| Action Date |
Action |
Description |
DEC Staff |
| 5/7/1981 |
Site Added to Database |
Date the "umbrella" site, Tatalina "umbrella" site, Tatalina LRRS Base Facilities, Reckey 198125X91270, was originally added to the database. |
Former Staff |
| 7/22/1988 |
Update or Other Action |
Final Technical Support Document for Record of Decision (dated February 29, 1988) received. Sites 1 (SS001), 2, 3, and 9 are spill/leak sites, sites 5, 7, 8, and 10 are previously used dumpsites or waste accumulation areas, site 6 is an area of Lower Camp road oiling, and sites 4 and 11 are the active landfill and waste accumulation area, respectively.
Road Oiling {Site 6}-Road oiling at the Tatalina site occurred from the 1950's to the 1980"s. Waste oils were applied to the roads as a dust palliative and for disposal purposes. Until recently, the practice of road oiling to control dust was an accepted practice throughout the United States. Oils used in this manner do not release hazardous materlals into the environment
because waste oils do not contain more than trace amounts of hazardous materials. Surface disposal of oil brings the oil into contact with organisms which readily biodegrade most petroleum hydrocarbons, leaving small amounts of weathered insoluble and immobile materials. There was no evidence of contamination found on or along the roads during the 1987 visit. No dark staining was apparent on or along the roadways.
2.3.6 Waste Accumulation Areas Nos. 3 (SS007) & 4 (SS008) - Lower Camp(Sites 7 and 8):
These two waste accumulation areas are contiguous and located in the Lower Camp area. Sites 7 and 8 are areas in the old station complex used to accumulate drummed wastes from the power plant and motor pool, respectively. These areas were in operation from the 1950's to 1984 and were demolished and covered with one meter of fill material in 1987. Sites 7 and 8 were used to store drummed waste oils and motor pool wastes. Although minor leaks and spills have been reported in the past, no evidence of contamination existed during the 1987 site visit. No further action is therefore recommended for this site.
Note attached to this document from ADEC project manager, Ray Burger, remarks that:USAF (David Paulsen Colonel March 7, 1988), USEPA (Jacques Gusmano February 21, 1988) and ADEC signed the ROD in 1988 (Bill Lamoreux July 22, 1988) , but the ROD was based on almost no sampling of some sites, therefore was deemed inadequate and a RI/FS was necessary. |
Bill Lamoreaux |
| 8/31/1992 |
Update or Other Action |
A SI was conducted at SS008 WAA No. 4 in 1992. During the 1992 SI, three surface and three collocated subsurface soil samples were collected from WAA No. 4 and analyzed for volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), pesticides/PCBs, and metals. Compounds detected in these samples included: toluene, ethylbenzene, xylenes, 1,2,4-trichlorobenzene, pesticides/ PCBs, and metals. |
Jennifer Roberts |
| 4/19/1993 |
CERCLA SI |
EPA letter to Patrick M. Coullahan (LTC), Commander U.S. Air Force, 11th CEOS. This letter is to inform you that EPA Region 10 has completed the review of the Site Inspection (SI) report for the US Air Force Tatalina Long Range Radar Site, Alaska. The SI has been evaluated in accordance with 40 CFR Part 300 Appendix A, which is EPA's Hazard Ranking System (HRS) used to evaluate federal facilities for inclusion on the National Prioritles List (NPL).
From our evaluation, EPA has determined that the site does not score high enough to be proposed for inclusion on the NPL. Therefore, a recommendation of no further remedial action planned (NFRAP) on the EPA's part will be included in our Federal Agency Hazardous Waste Compliance Docket tracking system. If new or additional information becomes available that suggests the facility may score high enough to be proposed for the NPL, EPA must reevaluate your facility accordingly.
EPA's NFRAP designation will NOT relieve your facility from complying with appropriate Alaska state regulations (i.e. A.S. 46.03, 18 AAC 75, 18 AAC 78, 18 AAC 60, 18 AAC 70, 18 AAC 80, 18 AAC 62). The Superfund Amendments and Reauthorization Act (SARA) of 1986*, Section 120(a) (4) requires federal facilities to comply with state cleanup requirements and standards when not listed on the NPL. All sources of contamination should be remediated to Alaska State clean-up standards.
An alternative water supply should be provided immediately to on site personnel, and the water gallery well should be resampled. Analytical results should be provided to both the EPA and the state of Alaska.
This facility will not be removed from the Federal Agency Hazardous Waste Compliance Docket, but as noted earlier, will be listed for no further action by EPA. If you have any questions regarding EPA's evaluatlon of the site, please contact me, at (206)553-1808.
NOTE to File: CHAPTER 103--COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION, AND LIABILITY
SUBCHAPTER I--HAZARDOUS SUBSTANCES RELEASES, LIABILITY, COMPENSATION
Sec. 9620. Federal facilities
(a) Application of chapter to Federal Government
(1) In general
Each department, agency, and instrumentality of the United States (including the executive, legislative, and judicial branches of government) shall be subject to, and comply with, this chapter in the same manner and to the same extent, both procedurally and substantively, as any nongovernmental entity, including liability under section 9607 of this title. Nothing in this section shall be construed to affect the liability of any person or entity under sections 9606 and 9607 of this title.
(2) Application of requirements to Federal facilities
All guidelines, rules, regulations, and criteria which are applicable to preliminary assessments carried out under this chapter for facilities at which hazardous substances are located, applicable to evaluations of such facilities under the National Contingency Plan, applicable to inclusion on the National Priorities List, or applicable to remedial actions at such facilities shall also be applicable to facilities which are owned or operated by a department, agency, or instrumentality of the United States in the same manner and to the extent as such guidelines, rules, regulations, and criteria are applicable to other facilities. No department, agency, or instrumentality of the United States may adopt or utilize any such guidelines, rules, regulations, or criteria which are inconsistent with the guidelines, rules, regulations, and criteria established by the Administrator under this chapter.
(3) Exceptions
This subsection shall not apply to the extent otherwise provided in this section with respect to applicable time periods. This subsection shall also not apply to any requirements relating to bonding, insurance, or financial responsibility. Nothing in this chapter shall be construed to require a State to comply with section 9604(c)(3) of this title in the case of a facility which is owned or operated by any department, agency, or instrumentality of the United States.
(4) State laws
State laws concerning removal and remedial action, including State laws regarding enforcement, shall apply to removal and remedial action at facilities owned or operated by a department, agency, or instrumentality of the United States or facilities that are the subject of a deferral under subsection (h)(3)(C) of this section when such facilities are not included on the National Priorities List. The preceding sentence shall not apply to the extent a State law would apply any standard or requirement to such facilities which is more stringent than the standards and requirements applicable to facilities which are not owned or operated by any such department, agency, or instrumentality. |
Jennifer Roberts |
| 7/15/1993 |
CERCLA PA |
Final Site Investigation Report (dated July 1993). Source 8: Waste Accumulation Area No. 4 is located on the same gravel pad as Waste Accumulation Area No. 3 (Source 7) near the site of the former motor pool. The WAA #4 was used from the 1950s until 1984 for storage of waste oil drums. The 1992 field team did not see any evidence of contamination.
Three surface and three co-located subsurface soil samples were collected for this source. No stains were seen. The samples were analyzed for TCL/TAL compounds. Sample TL-K005-A733 from 0.5 ft. depth detected (J flagged) 1.9 mg/kg Aroclor 1260 and sample TL-S030-A734 soil boring at 3.0 ft. detected 10 mg/kg Aroclor 1260. |
Ray Burger |
| 3/28/1995 |
Update or Other Action |
Management Action Plan (draft dated Febraruy 1995, received March 28, 1995, no final received). |
Ray Burger |
| 1/8/1997 |
Update or Other Action |
Final UST Release Investigation Report (dated December 1996) for the Water Gallery near Waste Accumulation Area Number 4 (SS08) and Truck Fill Stand (SS009). (NOTE: UST is in LUST DB as event ID 735 reckey 199325X030661)
Four soil borings were placed around the former UST location. Gasoline range organics (GRO), benzene, toluene, ethylbenzene, and xylenes and lead were used to analyze the soil at the site. 70 cubic yards of contaminated soil was stockpiled at the site and sampled in nine locations which were used to composite three samples (3 per sample). This was to allow for a "random" sampling to quantify the average level of contamination in the pile.
Soil stockpile samples were below method detection limits for GRO and lead levels were within the natural range of soil. Soil boring samples were below method detection limits for GRO in all but one sample which had GRO at 6.8 mg/kg. BTEX was below 10 mg/kg. Lead was not above normal for area soils. |
Gretchen Pikul |
| 2/13/1997 |
Update or Other Action |
Site added by Shannon and Wilson, Inc. this date. Site split off from the Tatalina "umbrella" site, Tatalina LRRS Base Facilities, Reckey 198125X912701. All relevant information from the "umbrella" site moved into subordinate sites 10/31/01 by Pikul and Petrik. |
S&W-Miner |
| 2/13/1997 |
Update or Other Action |
(Old R:Base Action Code = SI - Site Investigation). SI action added on 02/13/1997 by Shannon and Wilson, Inc. Based on Air Force Relative Risk Evaluation Worksheet dated 8/28/95, Site Investigation is the current phase. |
S&W-Miner |
| 3/7/1997 |
Site Characterization Workplan Approved |
Remedial Investigation Workplan and associated plans (draft dated August 1996; final dated June 1997 and received on January 13, 1997; ADEC comment letter dated February 4, 1997; comment resolution meeting on March 7, 1997; no final received following ADEC comment letter and comment resolution meeting. |
Gretchen Pikul |
| 1/12/1998 |
Update or Other Action |
Final Management Action Plan (dated and received in January 1998). |
Gretchen Pikul |
| 2/10/1998 |
Update or Other Action |
Draft Remedial investigation received. WAA No.4, Old Sanitary Sewer System, Former Sewage Lagoon, & Former Paint Shop (SS-008).
Analytical results from the soil samples collected from test pits & borings indicate the presence of POL contamination within the Lower Camp pad. Low levels of POL compounds were detected in soil samples from BH2/MW, BH3/MW, BH4, & BH6. Elevated GRO, DRO, & RRO concentrations were found in BH7, BH8, TP1, & TP2.
Maximum GRO levels (630 mg/kg) were found in surface soils at BH7, but decreased significantly to 95 mg/kg at 6 feet & to below reporting limits at the 15-foot depth in that boring. Maximum DRO levels (23,900 mg/kg) were found in soils at the 6-foot depth in BH8 but decreased significantly to 136 mg/kg at the 15-foot depth in the boring. RRO levels were also elevated in BH6 at the 6-foot depth but decreased at the 15-foot depth.
The source of the elevated POL soil concentrations is likely surface spills associated with refueling activities or drum storage & past fuel disposal activities along the edge of the Lower Camp pad. The analytical data & site observations indicate that a subsurface lens of petroleum hydrocarbon contamination at this location within the Lower Camp pad resulted from the past surface releases & disposal followed by filling & grading of the pad during Lower Camp building removal activities. Only one compound, DRO, was detected in groundwater at this source area & was reported at BH2/MW, BH3/MW, & the infiltration gallery at 55 ug/L, 153 ug/L, & 73 ug/L, respectively.
The presence of contamination in groundwater suggests that very limited infiltration of POL contaminants may have occurred from source areas on the Lower Camp pad. Contaminants from surface releases on the Lower Camp pad may have infiltrated to bedrock under the pad & migrated towards the creek along the bedrock. As the POL compounds migrated in the perched water table, they were likely sorbed to soil particles & diluted along the pathway. This reduction in concentrations by physical processes may explain why only low levels of POL contaminants in water were reported in downgradient water samples.
Analytical results from the sediment sample collected along the creek downgradient of the Lower Camp pad indicated low levels of pesticides & their breakdown products. 4,4'-DDD, 4,4'-DDE, & 4,4'-DDT were detected at 0.32, 0.24, & 2.5 mg/kg, respectively. The levels of these pesticides exceeded ecological risk levels developed in the baseline risk assessment. VOCs & PCBs were not detected in the sediment. VOCs detected in surface water were at very low levels & the majority of the results were qualified by lab as potentially biased because of matrix interference. No SVOCs, pesticides, or PCBs were detected m the surface water sample collected at this location.
4,4'DDT, 4,4'-DDD and 4,4'-DDE were detected m the one sediment sample at concentrations exceeding aquatic organism CTVs. For that reason, they were retained as COECs. These compounds were also detected in BH7, the two test pits, and in a sediment sample approximately 1,600 feet downgradient along the same creek. These concentrations are consistent with sampling results from the 1992 sampling program, are likely residual levels from past routine use of pesticides at the installation, and do not warrant remedial action.
The petroleum contamination at the BH8 location appears to be confined vertically within a subsurface lens. The full horizontal extent was not determined during the RI. Although additional subsurface information could be obtained on the pad, sampling downslope from BH8 may not be feasible because of the steep slope. The pad itself is acting as a potential cap and additional vertical migration of contaminants ts unlikely to be significant.
To verify that existing contamination at BH8 does not migrate to and affect surface water, monitoring of surface water and sediment downgradient BH8 is recommended. The monitoring should consist of surface water and sediment sample collection at the existing creek location and laboratory analysis for petroleum hydrocarbons. Annual monitoring for 3 years at this location is recommended. |
Gretchen Pikul |
| 6/2/1998 |
Update or Other Action |
ADEC participated in a facility-wide site visit. |
Gretchen Pikul |
| 10/13/1998 |
CERCLA RI Report Approved |
Remedial Investigation Report (draft dated February 1998, final dated & received in October 1998) includes a risk assessment; ADEC comment letter dated March 31, 1998; comment resolution meeting on May 15, 1998. Analytical results from the soil samples collected from test pits & borings indicate the presence of POL contamination within the Lower Camp pad. Low levels of POL compounds were detected in soil samples from BH2/MW, BH3/MW, BH4, & BH6.
Elevated GRO, DRO, & RRO were found in BH7, BH8, TP1, & TP2. Maximum GRO levels (630 mg/kg) were found in surface soils at BH7, but decreased significantly to 95 mg/kg at 6 feet & to below reporting limits at the 15-foot depth in that boring. Maximum DRO levels (23,900 mg/kg) were found in soils at the 6-foot depth in BH8 but decreased significantly to 136 mg/kg at the 15-foot depth in the boring. RRO levels were also elevated in BH6 at the 6-foot depth but decreased at the 15-foot depth.
Conclusions & Recommendations: No COCs or COECs were identified for the test pit & soil boring/monitoring well locations evaluated in the baseline risk assessments for SS-008, WAA No. 4. In the Lower Camp pad, the elevated POL compounds were found immediately around SS-009 & the eastern bank of the pad.
DRO levels in subsurface soil at the BH8 location exceed current ADEC non-UST guidance & proposed cleanup standards in draft 18 AAC 75 regulations (November 12, 1997). Analytical data from GW & from seep & sediment downgradient of the source area confirms that contaminants have not migrated through the pad to GW or to surface water pathways in the area. The fuel contamination originated from releases that occurred prior to the removal of Lower Camp structures in the mid-1980s; it is assumed that the petroleum hydrocarbon levels have been decreasing over the years & they are expected to continue to decrease in that area.
4,4'DDT, 4,4'-DDD & 4,4'-DDE were detected in the one sediment sample at concentrations exceeding aquatic organism CTVs. For that reason, they were retained as COECs. These compounds were also detected in BH7, the two test pits, & in a sediment sample approximately 1,600 feet downgradient along the same creek. These concentrations are consistent with sampling results from the 1992 sampling program, are likely residual levels from past routine use of pesticides at the installation, & do not warrant remedial action.
The petroleum contamination at the BH8 location appears to be confined vertically within a subsurface lens. The full horizontal extent was not determined during the RI. Although additional subsurface information could was not determined during the RI. Although additional subsurface information could be obtained on the pad, sampling downslope from BH8 may not be feasible because of the steep slope.
|
Gretchen Pikul |
| 10/13/1998 |
Risk Assessment Report Approved |
Risk Assessment, a part of the Remedial Investigation Report (draft dated February 1998, final dated October 1998); ADEC comment letter dated April 6,1998; comment resolution meetings on May 11, 1998; ADEC Memorandum on Response to Comments dated August 3, 1998. |
Gretchen Pikul |
| 6/17/1999 |
Update or Other Action |
Work Plan Underground Storage Tank Post Closure Investigations; draft dated and received on June 4, 1999; Internal meeting with STP project manager on and ADEC comment letter dated June 17, 1999; no final work plan received by ADEC. |
Gretchen Pikul |
| 8/3/1999 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (ADEC), DoD Oversight group, received the Remedial Investigation / Feasibilty Study Sampling and Analysis Plan Addendum(dated July
1999) on July 30, 1999. We have acknowledge the expedited review period to meet field work and public meeting deadlines, have completed our review, and provided comments below.
General comments
1. Based on this SAP, Sites LF-004, SS-008, and SS-002 wdl have follow-on investigations. It is the Department’s understanding through meetings and comment letters that the contamination
encountered at Sites SS-003 (POL Tank Farm) and SS-011 (Hardfill No.1 and Waste Accumulation Area No 1) will be addressed in the future, and prior to site closure.
2. Based on meetings, comment letters, and telephone conversations three borings at Site SS-008 were to be completed as monitoring wells if a productive groundwater zone was reached within a reasonable depth from the ground surface. If monitoring well installation were not possible, then seep and sediment samples would be collected downgradlent of the BH-8 area.
The soil and groundwater samples collected for laboratory analysis would be analyzed for the complete suite of analytical methods based on the contaminants of concerns within a drum storage area. This information needs to be incorporated into this workplan for ADEC concurrence. In addition, outfall areas were to be sampled. There appears to be 2 or 3 outfall locations within the Lower Camp area; these locations need to be sampled for the full suite of analyses as part of the remedial investigation. |
Gretchen Pikul |
| 8/4/1999 |
Meeting or Teleconference Held |
Takotna Public Meeting. Mr Steve Wilhelmi, of Elmendorf Air Force Base, introduced himself and Ms. Greta Myerchin, who would be taking minutes of the meeting Speakers and commumty members in attendance at the meeting included Gretchen Pikul,ADEC, Clinton Goods,Takotna, Samer Karmi, U.S. Air Force, Corey Rudd, Takotna High School, Steve Wilhelmi, 611 CES/CEVR Dick Newton, Takotna, Rob Crotty, CH2MrHill Jack Nichoh, Takotna High School, Greta Myerchm, Montgomery Watson, Kim Pollreis, Takotna High School, Carl Propes, McGrath, Takotna, Nikolai, and Chuck Gottschalk, Takotna, Tehda, Limited (MTNT) David Fox, Takotna High School, Judy Vanderpool,MTNT, Michael Fair, Takotaa High School, Sally Hooper,Takotna, Robert Mdler, Takotna Village Corporation (TVC), Nell Huffman,Takotna, Jan Newton,TVC, Chuck Gottschalk,Takotna and Jeff Ralston, Charter School.
Steve Wilhelrm introduced Gretchen Pikul, from the Alaska Department of Environmental Conservation (ADEC), Samer Karmi, with the Air Force Center of Environmental Excellence, and Rob Crotty, with CH2M Hill. The community members attending the meeting were asked to introduce themselves. Mr. Wilhelmi stated that the purpose of this meeting was to inform attendees of the 1999 activities at Tatalina and to get their input about the cleanup process. In addition, Mr Wilhelmi said that thrs meeting would address the basic steps for forming a RAB.
Mr. Karmi noted that the Air Force provides information to the community and solicits input from community members who may be aware of past activities at tbese locations. Providing a historical perspective helps the Air Force identify potentially contaminated sites.
Mr. Karrm said Air Force activities would begin around August 23, 1999. Efforts will be concentrated at Sterling Landing, a waste accumulation area near the base of the Air Force Station proper, and at the historic landfill.
Mr. Crotty stated three sites are currently being investigated. In 1997, an investigation of 18 potentially contaminated sites was begun at Tatalina, and action plans were developed for most of the sites based on existing information. He described the remaining three sites, and the information still needed for those sites. Ms. Pikul noted that there are actually five sites, but current work is limited to three due to funding limitations.
At Sterling landing, CH2M Hill will drill between 11 and 16 borings and sample the soil for petroleum contamination. They will also install some groundwater monitoring wells and sample the existing wells. Additional borings and sampling will be completed at Waste Accumulation Area SS008, located at Lower Camp. Sampling at this area will help in interpreting results of the prewous investigataon and determining if there is any soil contamination that may affect groundwater. If groundwater is encountered, three borings will be completed into momtoring wells and groundwater will be sampled. At the Lower Landfill, the AF will determine the depth and type of cover material that has been placed over the landfill, and sample any seeps for potential contamination. Work is planned to begin August 23, and an attempt will be made to minimize impact to the community.
Ms Pikul stated the Work Plan would be mailed to the library for anyone to examine before work begins. The plan shows where drilling is planned to occur; however, Mr. Crotty noted that exact locations may change due to new information and/or site specific conditions Mr. Karmi encouraged commumty members to come to the site if they are interested.
However, there will be some exclusion zones dunng drilling, based on health and safety concerns Mr. Karmi said it might be possthle for someone with proper training to get closer if they were appropriately prepared (e.g. proper safety gear and training). Mr. Karmi emphasized that the Work Plan was still a "draft", requirmg further review. Commumty input is welcome.
For additional information see site file. |
Gretchen Pikul |
| 10/14/1999 |
Site Ranked Using the AHRM |
Initial ranking. |
Gretchen Pikul |
| 11/3/1999 |
Update or Other Action |
Remedial Investigation / Feasibility Study Sampling Plan Addendum - follow-on Remedial Investigation at Sterling Landing, Lower Camp, and LF04 (draft dated July 1999, no final received); ADEC comment letter dated August 3, 1999; comment resolution meeting and public meeting dated August 4, 1999; preliminary results data meeting on November 3, 1999. |
Gretchen Pikul |
| 12/31/1999 |
Update or Other Action |
1999 Underground Storage Tank (UST) Closure Activities. During the 1987 demolition
activities at Lower Camp, five ADEC-registered USTs in the vicinity of SS008 were removed.
This removal did not include submittal of an application for tank closure with ADEC. In 1999,
the former footprints of the USTs were re-located, excavated, and field screened to determine if
contamination existed. Closure reports for all five USTs were submitted to ADEC in December
1999 (USAF, 1999a, 1999b, 1999c, and 1999d). The Air Force concluded that PHC contamination was present in soil around the former footprints of ADEC USTs 769-2, 769-5, and 769-6, located next to the truck fill stand. |
Gretchen Pikul |
| 2/25/2000 |
Update or Other Action |
Monitoring well BH37-MW was installed at site SS008 during the 1999 follow-on remedial investigation. Samples collected as part of the 1999 follow-on remedial investigation include one subsurface soil sample and one groundwater sample.
1999 Follow On RI.
Monitoring well BH37-MW was installed. A soil sample was collected at depths of 5 – 7 feet bgs. The sample was analyzed for GRO, DRO, RRO, VOCs, SVOCs, BTEX, metals, lead, and pesticides/PCBs. A 0.17 ft thick layer of free product was removed. groundwater sample was collected from monitoring well BH37-MW after the free product was removed. Groundwater sample was analyzed for GRO, DRO, RRO, VOCs, SVOCs, BTEX, metals, and pesticides/PCBs.
DRO was detected at 190 mg/L. |
Louis Howard |
| 3/1/2000 |
Update or Other Action |
1999 Follow-on RI received. The 1999 RI was intended to document the extent of DRO contamination
around boring location BH8, located near the truck fill stand at SS008. Sampling activities at
three borings (BH21, BH37, and BH38). BH37/MW was located northeast and downgradient of
the truck fill stand, were completed as monitoring wells. BH21 and BH38 were located southeast
of the truck fill stand. Two surface water and sediment samples were collected from within the
creek east and downgradient from the Lower Camp pad area (USAF, 2000b). This was the same
location compared to the 1997 RI.
Sampling results indicated the presence of DRO in surface soil from Boring BH21. Samples
from all other borings located near the truck fill station were non-detect for DRO, gasoline range organics (GRO), and residual range organics (RRO). Antimony, arsenic, chromium, nickel, and one PCB (Aroclor 1260) were also detected in the soil samples above ADEC cleanup levels. A
0.17-foot-thick layer of floating product with a petroleum odor was found on top of the
groundwater in BH37-MW. The product was removed during well development before groundwater was sampled. DRO, beryllium, cadmium, chromium, lead, nickel, and zinc were detected in the sample from Monitoring Well BH37-MW.
DRO, GRO, and RRO concentrations in the surface water and sediment samples in 1999 ranged
from very low to non-detect |
Gretchen Pikul |
| 4/12/2000 |
Document, Report, or Work plan Review - other |
ADEC received the Draft Results of 1999 Follow-on RI of SS-008/WAA No.4 (dated February 25, 2000) on March 1, 2000. We have completed our review, & provided comments below.
Pg. 9 2.3.1 WAA No.4: Please include that the pad near the former garage & vehicle storage building was a “gravel” pad. 2. Pg. 13 3.3.2 Soil Sampling: It is stated the samples were placed in a freezer held below 4 degrees C until they were packed for transportation to the lab in ice coolers, also held at a temperature below 4 degrees C. Please note that freezing soil samples is not the standard, approved sample preservation procedure. As required by 18 AAC 78 soil sample containers must immediately be cooled to 4 plus or minus 2 degrees C & this temperature must be maintained throughout delivery to lab & analysis until samples are analyzed.
This reference can be found in ADEC UST Procedures Manual, Guidance for Treatment of Petroleum-Contaminated Soil & Water & Standard Sampling Procedures (dated December 10, 1998), section 4.6 Collecting soil samples, & was adopted by reference in 18 AAC 75.355. Freezing the soil samples may bias the analytical results low, especially for the VOCs; this notation needs to be added to the appropriate text sections, figures, & tables. To ensure defensible lab data, all future samples need to be collected & preserved following approved methods & guidance.
Pg. 14 3.5.1 Surface Water Sampling: Please note the proper sampling procedure for surface water sampling containers with preservatives is to collect the sample in a clean, sampling container provided by the lab & transfer slowly (to prevent excess aeration) into the sampling container with the preservatives. If this procedure was not followed some of the preservatives may have been loss during sample collection, & the analytical results may be bias low. Please clarify how the surface water samples with preservatives were collected, & make the necessary clarifications to the appropriate text sections, figures, & tables.
Pg. 14 3.5.2 Sediment Sampling: Composite sampling is not an acceptable sampling procedure for the contaminants of concern & is a deviation from the approved workplan. Please address. Pg. 15 3.6.1 Analytical Program: It is stated that the potential contaminants included petroleum hydrocarbons & metals from diesel & mogas, & that there is no indication that other hazardous materials or hazardous wastes were used, stored, or disposed of at the site. The site also included a garage & vehicle storage area where solvents & other hazardous materials were most likely used, stored, & possibly disposed. The analytical methods performed on these site samples follows this line of investigation. Please correct these first two sentences.
|
Gretchen Pikul |
| 4/28/2000 |
Update or Other Action |
Underground Storage Tank Post-Closure Report; final report received December 21, 1999, no draft reports were received by ADEC for review and comment; ADEC STP comment letter dated April 28, 2000 noted decisions on facility tank sites. |
Gretchen Pikul |
| 5/22/2000 |
Update or Other Action |
Results of 1999 Tatalina LRRS Follow-on Remedial Investigation of Source Area SS-008 (draft dated 2-25-00; ADEC comment letter dated 4-12-00; final dated May 22, 2000).
Comparison of results to Method 2 Tables Bl & B2 soil cleanup standards revealed the following:
• Petroleum Hydrocarbon Results. Only surface soil in Boring BH21 contained DRO at 321 mg/kg which is above Method 2, Table B2 soil cleanup standards; fuel contaminants were ND in all other samples.
• Non-petroleum Hydrocarbon Results. Several metals-including antimony, arsenic, chromium & nickel, were above Method 2, Table B2 soil cleanup standards in soil samples collected. PCBs, expressed as Aroclor-1260, was above 1 mg/kg in surface soil collected from Boring BH21.
GW was sampled in BH37/MW.
• A 0.17-foot-thick layer of floating product was found on top of GW in BH37/MW. The source of this floating product & GW contamination at SS-008 appears to be subsequent horizontal migration from an offsite source. The product had a petroleum hydrocarbon odor & was removed during well development before GW was sampled & submitted for offsite analysis. Only DRO was above its Table C GW cleanup standard.
• Non-petroleum Hydrocarbon Results. Sampling results identified beryllium, cadmium, chromium, lead, nickel & vanadium above their respective 18 AAC 75.345 Table C GW cleanup standards.
Petroleum Hydrocarbon Surface Water & Sediment Results
Fuel constituents were not detected in surface water collected at either Station 1 or 2. DRO estimated at 32 mg/kg & RRO detected at 390 mg/kg were the only fuel constituents detected in underlying Station 1 sediment. The background levels for DRO in sediment in the Lower Camp area is 40 mg/kg. Fuel constituents found in sediment at Station 2 included 2,740 mg/kg DRO, 2 mg/kg GRO & 430 mg/kg RRO. A review of the raw data for TJSD02A1, however, indicates that a portion of the DRO result may be biogenic interference.
Contamination in the SS-008/WAA No.4 area includes elevated fuel constituents in soil & GW. Analytical results also confirm that diesel fuel is the source of contamination in the SS-008/WAA No.4 area & is found as follows:
• Soil. Overall, the highest levels of residual fuel in SS-008/W AA No.4 area are at the Lower Camp pad in surface & subsurface soil around the fuel dispenser of the former truck fill stand, which is east of the former garage, & in subsurface soil at a south of the former vehicle storage building. Both buildings were on the Lower Camp pad which is west of the area investigated during the 1999 RI.
Soil contamination generally increases with depth around the former fuel dispenser. Therefore, the source of the contamination is likely surface releases & possibly subsurface releases of diesel fuel from ADEC UST 769-2. Surface soil contamination was not found at BH8, nor are there records of USTs east of the vehicle storage facility. This suggests that, in light of past pad demolition practices, the surface releases were graded over & filled during demolition of Lower Camp structures in 1987.
GW. Floating product & elevated dissolved diesel constituents were found in GW around BH37/MW. By comparison, floating product was not found in any other wells sampled in SS-008/W AA No.4. The wells contained only limited or trace dissolved fuel constituents.
For additional information see site file.
|
Gretchen Pikul |
| 8/10/2000 |
Meeting or Teleconference Held |
Public meeting in Takotna, and site visit to Sterling Landing. |
Gretchen Pikul |
| 5/17/2001 |
Update or Other Action |
The Alaska Department of Environmental Conservation (ADEC), DoD Oversight group, received the final documents entitled the Results of 1999 Tatalina LRRS Follow-on Remedial Investigation
and Closure Evaluation of Source Areas LF-004 (dated February 25, 2000) and the Results of 1999 Tatalina LRRS Follow-on Remedial Investigation of Source Areas SS-008/WAA No.4 (dated May 22, 2000) on April 27, 2000 and May 26, 2000.
We provided comments on the draft documents within 2 separate comment letters on March 14, 2000 and April 12, 2000 The Air Force response to comments were provided on April 24, 2000 and May 11, 2000. Based on our review of the draft documents and the response to comments,
ADEC concurs with the follow-on investigation reports conclusions and recommendations, and therefore approves these documents based on resolution of the Department e-mail dated May 12, 2000 regarding Source Area SS-008.
-The response to AFCEE General Comment #5 point #2 includes "soil and groundwater samples should be submitted for a full analytical suite including fuel constituents (DRO and GRO)", etc. RRO should be included within the analytical suite, or information to support not including RRO should be reported.
-Response to ADEC Specific Comment# 2 is unclear. As stated in the comment and required by 18 AAC 78, soil sample containers must immediately be cooled to 4 + or - 2°C and this temperature
must be maintained throughout delivery to laboratory, until samples are analyzed. The response states below 4°C, which is not correct.
-The response to ADEC comment #5 is not completely accurate. Please review the following information taken from the Final RI, and adjust the response and final text.
SS-008 contains Waste Accumulation No.4 in which the Final RI figures (specifically Figure 8.8-1) encompass the garage, vehicle storage, and the power plant areas. SS-008 was used from the 1950s to 1984 to store waste oil drums from the former motor
pool SS-008 is located within 100 feet of SS-009 (Truck Fill Stand).
The same sample locations and sampling activities were conducted to supply RI information for both SS-008a nd SS-009. These areas are interrelated. Based on the WAA No. 4 and associated buildings, solvents and other hazardous materials were most likely used, stored, and possibly disposed within this IRP site.
-Response to ADEC Specific Comment #9 reports incorrect soil cleanup levels for lead and silver. Please adjust for the final response to comments. |
Gretchen Pikul |
| 6/20/2001 |
Update or Other Action |
ADEC received CD copy of Tatalina LRRS Administrative Record (dated April 2001) Disk 1. |
Gretchen Pikul |
| 6/20/2001 |
Meeting or Teleconference Held |
Public meeting in Takotna, site visits to all sites with new 611th project manager, and site-specific inspection for anticipated 2001 fieldwork. |
Gretchen Pikul |
| 10/10/2001 |
Update or Other Action |
Year 2000 Clean Sweep Environmental Survey Report (final dated September 5, 2001, received on October 10, 2001). |
Gretchen Pikul |
| 10/10/2001 |
Update or Other Action |
Air Force field visit and work (including land surveys for institutional controls required by Decision Documents) delayed until mid-September due to in-house crew work conflicts (August 9, 2001); delayed to October due to September 11th terrorist attacks (September 17, 2001); was cancelled for this field season due to bad weather and impassable road conditions (October 10, 2001); field work is scheduled for FY02. ADEC received final Clean Sweep Environmental Survey Report (dated September 2001). |
Gretchen Pikul |
| 10/19/2001 |
Meeting or Teleconference Held |
ADEC particpated in a community meeting in Takotna with Air Force. |
Gretchen Pikul |
| 1/29/2002 |
Meeting or Teleconference Held |
ADEC CS DoD Oversight and Air Force Environmental Restoration and Compliance meeting on 2002 field work. |
Gretchen Pikul |
| 3/4/2002 |
Update or Other Action |
Final Environmental Assessment for Property Disposal (dated August 1997, received on March 4, 2002). |
Gretchen Pikul |
| 3/11/2002 |
Update or Other Action |
The Alaska Department of Environmental Conservation (ADEC), DoD Oversight group, received your letter (dated February 20, 2002) requesting a waiver of 18 AAC 75.355(b) in order to use qualified Air Force personnel for the 2002 fieldwork at Tatalina LRRS. The site project objectives include USAFC ES/CEVO
employees obtaining soil and groundwater samples at Installation Restoration Program sites SS-002, SS-003, SS-008, and SS-011, as specified in the project’s forthcoming work plan that will be reviewed and approved, prior to field work, by this Department; the field work is currently scheduled from July through September,
2002.
Per your letter, the proposed qualified samplers are Mr. Joseph Millhouse, Mr. Carl Homlg, and Mr. James Linne of the USAF 611th CES/CEVO. These individuals are currently listed on the ADEC qualified persons website as qualified samplers, and were previously granted a waiver of the 18 AAC7 5.355(b) Impartial Third Party Requirements within ADEC letters dated August 29, 2001 and October 8, 2001.
A waiver of the Impartial Third Party requirement is granted and the 2002 fieldwork sampling by Mr.Millhouse, Mr. Homig, and Mr. Linne is approved. This waiver only applies to this specific project at Tatalina LRRS and does not extend to other projects or samplers. Signed Jennifer L. Roberts Section Manager. |
Jennifer Roberts |
| 4/24/2002 |
Document, Report, or Work plan Review - other |
ADEC comment letter Draft Work Plan Remedial Actions and Investigation which was received on April 19, 2002. 8.4 Site SS-008: The majority of this site description pertains to the portion of SS-008 across the roadway and southwest of the proposed field work; please revise.
It is stated that the RRO levels were also elevated in BH6 at the 6-foot depth, however, this is incorrect and should be reported as BH 8 at the 6-foot depth.
At the end of the first paragraph, BH2 ,MW should be corrected to BH2 /MW.
To provide a more complete picture of the contaminant extent and migration, the depth to groundwatear nd presence / absence of product should be recorded for the surrounding existing monitoring wells. Collection of groundwater samples from
these wells for analytical testing would aid in this investigation if funding allows.
Closure parentheses are needed within the first and second activities.
It is the Department’s understanding that a drill rig will be used to perform soil borings and to install monitoring wells within the # 2 activities, however, the field work description switches back and forth between test pits and drilling. In addition, the amount of soil samples, and the depth of soil sample collection and selection for analytical testing needs to be detailed. Please revise this section.
The north arrow on Figure 5 appears to be situated in a slightly different direction compared with previous investigations. Consider adjusting the proposed monitoring well located to the southeast of BH3 7/MWto a more downgradient and easterly position. |
Gretchen Pikul |
| 6/7/2002 |
Meeting or Teleconference Held |
Site visit, inspections, and meetings at facility with Air Force. Public meeting with Takotna community on June 3, 2002. |
Gretchen Pikul |
| 6/11/2002 |
Update or Other Action |
ADEC and Air Force meeting on 2002 field work and work plan; draft work plan dated April 2002 and received on April 19, 2002; comment resolution meeting on April 30, 2002; 2nd draft work plan received May 9 and 10, 2002; 3rd draft received May 28, 2002; 4th draft received on and comment resolution meeting on June 4, 2002; ADEC approval letter dated June 11, 2002. |
Gretchen Pikul |
| 11/29/2002 |
Update or Other Action |
2002 Follow-on RI
A total of 0.4 inches of free product was recovered from the monitoring well. Monitoring
wells within 100 feet did not contain any detectable levels of DRO, suggesting that the
free product might be localized in the area. |
Louis Howard |
| 12/9/2002 |
Update or Other Action |
Draft Annual Report received.
The Tatalina LRRS consists of three distinct areas: Upper Camp on Takotna Mountain, Lower Camp & the Airstrip, & Sterling Landing. Because they are so close, the Lower Camp & Airstrip areas are discussed as one overall area.
Site SS-08
This site was used from the 1950’s to 1984 to store waste oil drums from the former motor pool, & is shown on Figure 7. It is located on the northern side of the large flat gravel pad near the former garage & the former warm storage building, on the east side of the old Lower Camp pad. The 1998 RI compared soil, sediment, & surface water to values & rated ‘high risk’ in the baseline risk assessment. Analytical results from the soil samples collected from test pits & borings indicate the presence of POL contamination within the Lower Camp pad. Elevated GRO, DRO, & RRO were found in soil samples from BH 7, BH 8, TP 1, & TP 2. Maximum GRO levels (630 mg/kg) were found in surface soils at BH 7, maximum DRO levels (23,900 mg/kg) in soils at the 6-foot depth at BH 6, & RRO levels were also elevated in BH 8 at the 6-foot depth.
The source of the elevated soil concentrations is likely surface spills associated with refueling activities along the edge of the Lower Camp pad. DRO was detected in the GW at this source area & was reported at BH 2/MW, BH 3/MW, & infiltration gallery at 55 ?g/l, 153 ?g/l, & 73 ?g/l, respectively. The 1999 follow-on RI investigation recommended addition fieldwork at SS-008/WAA No. 4 & included the following activities.
Collect sediment (& water if present) samples from the same three culverts that were slated for sampling in 1999, but were found to be dry. Two of the three culverts were located & the third appears to have been excavated & destroyed. Another culvert was discovered adjacent to the northern most culvert however. The three culverts were dry & sediment samples were analyzed GRO, DRO, RRO, volatile organics (8021), SVOC (8270 SIM), total RCRA metals, & pesticides & PCBs (EPA methods 8081A & 8082).
All sediment samples from the three culverts contained concentrations of arsenic & chromium above ADEC clean up levels. Background samples collected & analyzed in 1993 contained concentrations of arsenic that ranged from 12.5 to 12.9 mg/Kg & chromium that ranged from 41.4 to 58.7 mg/Kg. Sample #52063028038 contained levels of Tetrachlorethane, Naphthalene, Benzo(a)Anthracene, Benzo(b)Fluoranthene, & Benzo(a)pyrene above ADEC clean up levels. Sample #52063028039 contained levels of Benzo(a)Anthracene &, Benzo(b)Fluoranthene above ADEC clean up levels.
Additional soil & GW sampling was conducted in order to evaluate the impact that floating petroliferous product has on GW & soil. Six monitoring wells & one borehole were drilled to GW to help delineate the extent of the plume. The February 2000 Follow-on RI (CH2MHill) recommended that one well should be placed between BH 2/MW & BH 37/MW. The other wells were placed north & east of BH 37/MW. The wells were placed between the stream to the north & the hill that housed the old power plant. The 6 new wells & the existing wells will provide a method of LTM to assess contaminant migration. Soil & GW samples were submitted for analysis for DRO, PCB/pesticide, & total metals (RCRA & lead).
A stream sample was collected down stream of all monitoring wells & this was additionally tested for GRO, RRO, 8260, & 8270. Water samples from BH/MW02-28, & 29 had detectable levels of DRO. The water sample from BH/MW02-28 had DRO that exceeds ADEC clean up levels. The water sample from the stream down gradient from the contaminant source area & monitoring wells contained trace amounts of 1,2-Dichlorethane. BH37/MW was not sampled because upon initial inspection, approximately 0.4 inches of free product was observed floating on the water.
Soil samples were collected at 5 foot intervals during well installation for PID. Samples were collected for laboratory analysis across the GW interface & when contamination is evident or suspected. Soil samples collected during monitoring well installation all had levels of arsenic & chromium that exceed ADEC clean up levels but the levels are consistent with levels at the site. Two soil samples from BH/MW02-28 had DRO levels that exceed ADEC clean up levels. Soil samples from BH/MW02-29, & 30 had detectable DRO concentrations.
The plume at SS-08 appears to be confined to the base or toe of the slope of the hill leading to the old motor pool. The stream & the wells farther away from the base of the hill are free of hydrocarbon contaminants. The new & existing monitoring wells will provide an excellent method for monitoring any migration or attenuation of the fuel plume. Sampling of the wells should be conducted every other year in order to assess contamination attenuation & migration.
|
Louis Howard |
| 2/5/2003 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (ADEC), DoD Oversight group, received the Draft Annual Report - Remedial Action and Monitoring Program (dated November 2002) on December 9, 2002. We appreciate the extended review period, have completed our review, and provided comments below.
8.4 Site SS-08: It is stated that the baseline risk assessment was rated a ‘high risk’; further clarification regarding this statement is necessary. Based on the RI report findings, the first paragraph has an error and should be corrected to ‘DRO levels (23,900J mg/kg) in soils at the 6-foot depth at BH 8, and RRO levels (13,200J mg/kg) were also elevated in BH 8 at the 6-foot depth.
Laboratory qualifiers are important to note when discussing sample results, especially in the infiltration gallery sample that also had DRO within the blank. Please revise BH2/MW to 55F µg/L and infiltration gallery sample to 73B µg/L.
The section describes 1998 RI report data, mentions the 1999 follow-on RI investigation recommended actions, and then describes the 2002 data; for completeness, a brief summary of the 1999 data should be included. The first complete paragraph on page 11 is unclear as to what timeframe these activities were performed; the activities need to be clearly noted as activities conducted in 2002.
A 1993 background sample study is noted; ADEC is not aware of this study. Further information is necessary before comparison to this data is deemed acceptable. Comparison to the 1997 RI and the baseline risk assessment is recommended. A February 2000 Follow-on Remedial Investigation is noted. To be consistent, the reference should remain as the 1999 follow-on remedial investigation, as used in previous paragraphs of this section.
The statement that the ‘plume at SS-08 appears to be confined to the base or toe of the slope of the hill leading to the old motor pool’ is unclear, when an earlier description states ‘the hill that housed the old power plant’; please revise. |
Gretchen Pikul |
| 4/9/2003 |
Update or Other Action |
2002 Follow-on RI received. To evaluate the extent of the floating product encountered in Monitoring Well BH37-MW, located northeast of the truck fill stand, additional groundwater monitoring was conducted during 2002. Six monitoring wells (BH/MW02-25 through BH/MW02-30) were
installed, along with one new borehole (BH02-31).
A total of 0.4 inches of free product was encountered in Monitoring Well BH37-MW. Wells
located within 100 feet of BH37-MW did not contain detectable levels of DRO, suggesting the
free product might be localized in this area. The 2002 RI report indicated that the fuel plume
appears to be confined to the base or toe of the slope of the hill that housed the old power plant and the new and existing monitoring wells. The stream north of the well adequately defined the contaminant plume and would provide an excellent method of monitoring any migration or attenuation of the fuel plume. |
Gretchen Pikul |
| 5/27/2003 |
Update or Other Action |
The Alaska Department of Environmental Conservation (ADEC), DoD Oversight group, received the Draft Follow-on Remedial Investigation at SS03, SS08, and SSll Work Plan (dated April 2003) on April 9, 2003, and the Air Force response to comments on May 27, 2003; the ADEC comment tetter was sent on May1 , 2003. Based on our review of the draft document and the Air Force response to comments, ADEC concurs with the work plan, and therefore approves this document based on the incorporation of these responses, as stated, within the final document.
The Air Force is responsible for the actions of contractors, agents, or other persons who perform work to accomplish the approved work plan. For any activity that significantly deviates from the approved plan, the Air Force shall notify the ADEC and obtain written approval in the form of a work plan amendment before beginning the activity. Any action taken by the Air Force, or an agent of the Air Force, that increases the project’s overall scope or that negates, alters, or minimizes the intent or effectiveness of any stipulation contained in this plan will be deemed a significant deviation from the approved plan. The final determination as to the significance of any deviation and the need for a permit amendment is the responsibility of the ADEC. Therefore, it is recommended that the ADEC be consulted immediately when a deviation from the approved plan is being considered.
Please note ADEC review and concurrence on this document is to ensure that the work is done in accordance with State of Alaska environmental conservation laws and regulations. While ADEC
may comment on other state and federal laws and regulations, our concurrence on this document does not relieve responsible persons from the need to comply with other applicable laws and
regulations. |
Gretchen Pikul |
| 5/29/2003 |
Update or Other Action |
Follow-on Remedial Investigation at SS03, SS08, and SS11 Work Plan; draft dated April 2003 and received on April 9, 2003; ADEC comment letter dated May 2, 2003; Air Force Comment Response received on May 27 and ADEC approval letter dated May 27, 2003; final received May 29, 2003. |
Gretchen Pikul |
| 5/31/2003 |
Meeting or Teleconference Held |
ADEC participated in a public meeting at Takotna and site visits for 2003 field work and general inspections. |
Gretchen Pikul |
| 10/29/2003 |
Update or Other Action |
Follow-on Remedial Investigation at SS03, SS08, and SS11 (draft dated October 2003 and received on October 21; ADEC comment letter dated October 29, 2003). |
Gretchen Pikul |
| 11/4/2003 |
Update or Other Action |
2002 Annual Report, Remedial Action and Monitoring Program; draft dated November 2002 and received December 9, 2002; ADEC comment letter dated February 5, 2003; Air Force response to comments received on February 19 and ADEC response sent on February 21; comment resolution meeting on March 17, 2003; draft final received on April 3, 2003; ADEC commented via e-mail on April 16, 2003; final dated April 2003 and received May 2, 2003; ADEC conditional approval letter dated September 25, 2003; final report received October 27, 2003 and CD on November 4, 2003. |
Gretchen Pikul |
| 8/9/2004 |
Update or Other Action |
Follow-on Remedial Investigation at SS03, SS08, and SS11 work plan - draft dated June 2004; ADEC received on June 14; ADEC comment letter dated June 16; Air Force Comment Response received on July 6, comment resolution teleconference and ADEC approval letter sent same day. On August 9, 2004, ADEC received 2 calls for field decisions by Air Force contractor. |
Gretchen Pikul |
| 8/27/2004 |
Update or Other Action |
Monitoring well BH37-MW was installed at site SS008 during the 1999 follow-on remedial investigation. Samples collected as part of the 1999 follow-on remedial investigation include one subsurface soil sample and one groundwater sample. The monitoring well was subsequently investigated in 2002, 2003, and 2004 as part of the follow-on remedial investigations for the site SS008. Although free product was removed from the monitoring well during the 2002, 2003, and 2004 follow-on remedial investigations, no groundwater samples were collected.
2004 Follow-on RI
Approximately 0.4 inches of free product was recovered from the monitoring well. A
groundwater sample was not collected from the well. |
Louis Howard |
| 3/25/2005 |
Update or Other Action |
2004 Follow-on RI received. Monitoring continued during the 2004 Follow-on RI. Groundwater samples were collected from the nine existing monitoring wells. The detection of DRO at BH/MW02-29 in 2004 was the first exceedence in this particular well, and most likely represented migration downgradient from Monitoring Well BH37-MW where free product was discovered. Similar to the previous Follow-on RIs, approximately 0.4 inches of free product was found in Monitoring
Well BH37-MW. |
Jeff Norberg |
| 5/20/2005 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (ADEC), Federal Facilities Oversight group, received the Draft Report - Follow-on Remedial Investigation at SS-003, SS-008, and SS-011 (dated March 2005) on March 25, 2005. We have completed our review, and have provided comments below. Thank you for the additional time afforded to review this document.
General Comments
1. The ADEC concurs with the conclusions and recommendations of this report. 2. Please submit a CD version of the entire final report within the final deliverable.
Specific Comments
1. (pg. 1-1) 1.0 Introduction: Please include reference that the work activities were performed in accordance with ADEC-approved Work Plan (USAF, 2004b). 2. (pg. 3-3) 3.1.2.3 Groundwater: According to the Final Work Plan (July 2004) a groundwater sample was scheduled to be collected from MW02-8 at Site SS03. Please indicate why this sample was not collected during the 2004 sampling event. Revise text to include the groundwater flow direction.
3. (pg. 3-3) 3.1.3.1 Liner Removal: Since the Work Plan addresses the potential for POL-contaminated water above the liner, please indicate if ponded water was observed during the removal. 4. (pg. 3-9) 3.4 Landfill Inspections: During the next scheduled landfill inspection, please take close-up photographs of potential compliance issues and include them in report (e.g., DP-005 – debris eroding through soil cap; SS-09 – collapsed utilidor; etc.). According to the solid waste permit the Air Force must maintain a protective soil cap and grade site contours to promote surface runoff without erosion.
Table 3-3: To facilitate the review process, please include the month when historical groundwater samples were collected, along with the well screen interval and depth to groundwater, if readily available. This evidence may provide indication as to why contaminant concentrations are fluctuating from year to year.
6. (pg. 3-21) Figure 3-2: Highlight the analytical result reported for benzene at TP2, 11.5 ft (Duplicate) as it exceeds soil cleanup level of 0.02 mg/kg. 7. (pg. 5-1) 5.0 References: Please update ADEC reference, most recent version of 18 AAC 75 is May 26, 2004. 8. Appendix A: Please provide copies of the Groundwater Sampling Field Note Forms completed during the 2004 field event (Appendix A of the Final Work Plan). Last page is a duplicate of Post-Closure Inspection Form (LF-010) also presented in Appendix B. |
Jeff Norberg |
| 7/18/2005 |
Update or Other Action |
The Alaska Department of Environmental Conservation (ADEC), Federal Facilities Oversight group, received the Draft Report - Follow-on Remedial Investigation at SS-003, SS-008, and SS-011 (dated March 2005) on March 25, 2005 and the Air Force Comment Response on July 18, 2005; the ADEC comment letter is dated May 20, 2005. Based on the inclusion of the Air Force Comment Responses within the final report, ADEC concurs with the contents of the document.
Please note that the ADEC review and concurrence on this document is to ensure that the work is done in accordance with State of Alaska environmental conservation laws and regulations. While the ADEC may comment on other state and federal laws and regulations, our concurrence on this document does not relieve responsible persons from the need to comply with other applicable laws and regulations.
|
Jeff Norberg |
| 8/29/2005 |
Meeting or Teleconference Held |
ADEC and Air Force project managers conducted a site visit to Tatalina LRRS from August 23 to August 26, 2005. The purpose of this visit was to provide an opportunity to view and to discuss the status of ongoing contaminated sites work being performed by the Air Force. |
Jeff Norberg |
| 8/31/2005 |
Document, Report, or Work plan Review - other |
Follow-on Remedial Investigation at SS03, SS08, and SS11; draft report dated March 2005 received on March 25; ADEC comment letter dated May 20; Air Force Comment Response and ADEC approval letter dated July 18; final dated August 2005 received August 31.
Groundwater-Five analytes were detected in nine groundwater samples collected from monitoring wells at SS08 at concentrations that exceeded ADEC Table C cleanup levels (Table 3-4 and Figure
3-3). These included: • DRO – detected in one of the nine samples at a concentration of 2.1 mg/L, above the ADEC Table C cleanup level of 1.5 mg/L. • Arsenic – detected in two of the nine samples at concentrations of 0.1 mg/L and 0.305 mg/L, above the ADEC Table C cleanup level of 0.05 mg/L. • Barium – detected in one of the nine samples at a concentration of 2.18 mg/L, above the
ADEC Table C cleanup level of 2.0 mg/L. • Chromium – detected in two of the nine samples at concentrations of 0.112 mg/L and 0.3
mg/L, above the ADEC Table C cleanup level of 0.1 mg/L. • Lead – detected in seven of the nine samples at concentrations ranging from 0.0152 mg/L to 0.0511 mg/L, above the ADEC Table C cleanup level of 0.015 mg/L.
Conclusions: DRO above the ADEC Table C cleanup level was found in Monitoring Well BH/MW02-29. This is the first regulatory exceedence of DRO in this well. However, this well lies at an
elevation downgradient from Monitoring Well BH37-MW, which has contained approximately 0.4 inches of free product since it was installed. Concentrations of metals in groundwater are considered representative of background conditions at the site, based on the similarity in concentrations of metals in groundwater
across the site. |
Jeff Norberg |
| 2/1/2006 |
Update or Other Action |
File number issued 2655.38.014. |
Aggie Blandford |
| 2/19/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Louis Howard |
| 8/17/2009 |
Document, Report, or Work plan Review - other |
Staff reviewed and commented on the Draft Focused Feasibility Study at SS003, SS008, and SS011, Draft Contract F41624-03-D-8608, Task Order 0214 Tatalina LRRS July 2009. Typically, following completion of the remedial investigation/feasibility study (RI/FS), the results of the detailed analyses, when combined with the risk management judgments made by the decision-maker, become the rationale for selecting a preferred alternative and preparing the Proposed Plan. Therefore, the results of the detailed analysis, or more specifically the comparative analysis, should serve to highlight the relative advantages and disadvantages of each alternative so that the key tradeoffs can be identified.
It will be these key tradeoffs coupled with risk management decisions that will serve as the basis for the rationale and provide a transition between the RI/FS report (or in this case the Focused Feasibility Study-FFS) and the development of a Proposed Plan (see EPA/540/G-89/004 OSWER Directive 9355.3-01 October 1988 Guidance for Conducting Remedial Investigations and Feasibility Studies Under CERCLA).
ADEC requests the Air Force remove of all text from the FFS regarding the preferred alternative selection for each site until the Proposed Plan stage where the preferred alternative is selected and presented (see EPA 540-R-98-031 OSWER 9200.1-23P PB98-963241 A Guide to Preparing Superfund Proposed Plans, Records of Decision, and other Remedy Selection Decision Documents July 1999).
ADEC interprets the phrase “subsurface water” to have the same meaning as groundwater. Specifically, 18 AAC 990(46) “groundwater” means: (A) water in the saturated zone, for purposes of evaluating whether the groundwater is a drinking water source under 18 AAC 75.350; or (B) water beneath the surface of the soil, for purposes of evaluating whether the water will act as a transport medium for hazardous substance migration. ADEC requests the Air Force change the text in the document to refer to groundwater instead of subsurface water.
Additionally, the seeps mentioned throughout the FFS are considered to be surface water by ADEC. As the groundwater emerges as surface water, the surface water quality standards apply. The document should point out this distinction and these seeps are regulated by 18 AAC 70 Water Quality Standards (as amended as of July 1, 2008) and the companion document Alaska Water Quality Criteria Manual for Toxic and Other Deleterious Organic and Inorganic Substances (as amended as of May 15, 2003). The word “seep” should be footnoted and defined as “surface water” at least once in the document and then footnotes are to be used for all of the tables where concentration ranges are listed for seeps.
ADEC has a global comment on arsenic risk through the document. Arsenic should not be discounted as a risk driver for a site on the basis that it is within background concentrations. ADEC requests the Air Force rework the text when discussing risk from arsenic to state that although arsenic risk exceeds acceptable risk levels, it is within background concentrations and therefore not considered a contaminant for remedial consideration.
ERP [Site] SS008 Results Page ES-3: The text refers to the HHERA results being used to establish RAOs for SS008. ADEC requests the Air Force change the text as follows-
• Prevent current and future human and ecological receptor exposure to contaminated surface soil on the eastern side of the pad where the old Lower Camp once stood.
• Prevent future human exposure to contaminated subsurface water and mallard exposure to contaminated sediment downgradient of the old Lower Camp pad.
2.2.2 ERP Site SS008 Page 2-6: ADEC requests the Air Force change the bullets to the following-
• Prevent current and future human and ecological receptor exposure to petroleum, pesticide, and PCB contaminated surface soil on the eastern side of the pad where the old Lower Camp once stood (Figure 2-2).
• Prevent future human exposure to petroleum and pesticide contaminated subsurface water and mallard exposure to contaminated sediment downgradient of the old Lower Camp pad (Figure 2-2).
2.3.2 ERP Site SS008 Page 2-15-The text states: “A series of site-specific cleanup levels have been calculated using the results of the updated HHERA (USAF, 2009), and are provided in Appendix A. Those RBCLs have been adopted as the quantitative PRGs for SS008 and are summarized in Table 2-3 for human and ecological receptors.” ADEC requests the Air Force provide clarification in the text of the report on what exposure group their RBCLs are protective of. It is not spelled out in the text of the report and only found in the Appendix RBCL tables. |
Louis Howard |
| 8/20/2009 |
Update or Other Action |
Final Risk Assessment for SS03, SS08, & SS11 received. SS08 consists of WAA No. 4, the old sanitary sewer system, the former sewage lagoon, & former paint shop. WAA No. 4 was used to store oil drums for the former motor pool from the 1950s to 1984. The old sanitary sewer system, constructed in the 1950s, received all drains from the Lower Camp. Neutralized battery acid, ethylene glycol & water, & possibly oil, fuels, & solvents, were disposed into the system. There have been reported releases of neutralized battery acid, as well as ethylene glycol & water discharges, into the former sewage lagoon. Primary contaminant sources at SS08 are related to waste oil drums storage at WAA No. 4 (located on the Eastern side of a large flat gravel pad), all drains from the Lower Camp Facility that are connected to the old septic tank (located downhill from SS03), & maybe some contaminants released onto the large flat gravel pad.
COPCs identified for SS08 include: Surface soil – inorganics, 1,3,5-trimethylbenzene, trichloroethene, SVOCs, Benzo(a)pyrene, DDT, & Arochlor 1260. Subsurface soil - inorganics, benzo(a)pyrene, dieldrin, Arochlor 1260, DRO, & RRO. Sediment - inorganics, benzo(a)pyrene, DDT, & Arochlor 1260. Sludge - aluminum, arsenic, chromium, cobalt, copper, manganese, titanium, & vanadium. Surface water - copper, lead, titanium, 1-chlorohexane, 2-chloroethyl vinyl ether, & vinyl chloride.
Subsurface water - inorganics, VOCs, 2-methylnaphthalene, naphthalene, & DRO.
COPECs identified for SS08 include: Surface soil - inorganics, 1,3,5-trimethylbenzene, carbon disulfide,trichlorofluoromethane, 2-nitroaniline, 3,3’-dichlorobenzidine, DDT, Arochlor 1260, DRO, GRO, & RRO. Sediment - inorganics, methylene chloride, m,p-xylenes, 3,3-dichlorobenzidine, 4-chloroaniline, PAHs, pesticides, Arochlor 1260, DRO, GRO, & RRO. Surface water - inorganics, VOCs, & pesticides.
Cumulative carcinogenic risk & noncarcinogenic HI estimates for a current site worker across all exposure media were 4 x 10-5 & 0.9, respectively, for non-PHC COPCs. Primary contributors to a carcinogenic risk estimate in excess of ADEC’s acceptable risk criterion of 1 x 10-5 were arsenic (EPC = 19 mg/kg) & Arochlor 1260 (EPC = 12 mg/kg) in surface soil; arsenic (EPC = 16 mg/kg) in subsurface soil; & arsenic (EPC = 21 mg/kg) in sediment. The noncarcinogenic HI is below ADEC’s acceptable HI criterion of 1. The cumulative noncarcinogenic HI estimate for a current site worker exposed to PHC-related COPCs was 0.2, which is below ADEC’s acceptable HI criterion of 1.
Cumulative carcinogenic risk & noncarcinogenic HI estimates for a current site visitor across all exposure media were 2 x 10-6 & 0.05, respectively, for non-PHC COPCs. The cumulative carcinogenic risk estimate is below ADEC’s acceptable risk criterion of 1 x 10-5, & the cumulative noncarcinogenic HI estimate is below ADEC’s acceptable HI criterion of 1. The cumulative noncarcinogenic HI estimate for a current site visitor worker exposed to PHC-related COPCs was 0.009. This noncarcinogenic HI is below ADEC’s acceptable HI criterion of 1.
Subsurface water beneath SS08 is not currently used for potable purposes. Furthermore, it is unlikely that subsurface water beneath SS08 would be used as a potable supply in the future, given that all potable water is supplied from potable supply wells located at the infiltration gallery.
Ecological HQ & HI estimates were calculated for receptors exposed to COPECs in soil: tundra vole (herbivore), masked shrew (invertivore), & least weasel (carnivore). Ecological HQ estimates in excess of 1.0 were calculated for the tundra vole, masked shrew, & least weasel exposed to soil. The highest HQ estimate (30) was calculated for the masked shrew & was attributable to Arochlor 1260 in soil (EPC = 12 mg/kg). Other COPECs with HQ estimates in excess of 1.0 include: antimony, arsenic, barium, 4,4’-DDT, DRO, & GRO. An ecological HQ estimate in excess of 1.0 was calculated for the mink exposed to barium in sediment (EPC = 240 mg/kg).
The different sources of uncertainty are incorporated in the risk estimate. Because the majority of these uncertainties err on the conservative side, the estimated risks presented in the HHERA for ERP Sites SS03, SS08, & SS11 most likely represent upper bound estimates of site risk. ADEC currently considers a cumulative cancer risk estimate of 1 x 10-5 & a noncancer HI of 1 as the point of departure for making risk mgt. decisions concerning a site. It should be noted, however, according to State of Alaska (AAC 75.325(h)) & EPA (USEPA, 1991) guidance, sites with a cumulative cancer risk estimate between 1 x 10- 6 & 1 x 10-4, & a noncancer HI of less than 1, may be appropriate for cleanup complete with institutional controls (or Air Force classification, NFRAP following an evaluation of site-specific issues related to future land uses, technical feasibility of remediation, & related considerations. |
Louis Howard |
| 10/15/2009 |
Meeting or Teleconference Held |
Meeting minutes from October 15, 1999 meeting. Project: Tatalina Feasibility Study,
Sites SS03, SS008, and SS011, Job Number 1851216. Participants: Louis Howard, ADEC, Marty Brewer, ADEC, Earl Crapps, ADEC, Robert Johnston, 611th CES/CEAR, Michael McCrum, MWH and Aseem Telang, MWH.
Robert indicated that he called the meeting to discuss the next phase of work at Sites SS003,
SS008 and SS011 at Tatalina LRRS. Robert wanted to get ADEC input on appropriate remedial
action at each of these three sites so he can program next year’s work.
The first several minutes of the meeting focused on bringing the ADEC representatives up to
speed on previous characterization efforts, with emphasis on the nature and extent of chemicals
of potential concern (COPCs) at each site. This portion of the discussion led to the
understanding that the primary COPCs at all three sites were petroleum hydrocarbons (and
related organic compounds). There is one location where sampling results indicated a PCB
concentration of approximately 17 mg/kg in surface soils at SS008. ADEC indicated that there
may be some flexibility in remedial action if the concentration is between 1 and 10 mg/kg, but
concentrations above 10 mg/kg require active remedial action.
Site SS008:
MWH briefed ADEC on general site boundaries, locations of key features within site boundaries
such as included portions of the lower pad, locations of culverts that route runoff from the pad, location of sediment relative to culverts, location of monitoring wells and surface water. The connection between sediment adjacent to the culverts and surface soil at SS008 was discussed.
There were questions regarding monitoring results for one well downgradient of the lower pad
that had at least one concentration exceeding Method 2 levels. Although questions regarding
groundwater could not be addressed during the course of the meeting, the ADEC indicated that
they would like the Air Force to:
• Actively remediate the area with PCB concentrations exceeding cleanup levels.
• Actively treat sediment near the culvert(s) that contain pesticides.
• Evaluate potential for active remedial action regarding groundwater based on summary of
results for the monitoring well with at least one concentration exceeding Method 2 levels.
The key issue with regard to groundwater monitoring results is consistency in the historical data. If review of historical data indicates that only one sample contained a small number of
parameters exceeding cleanup levels, there may not be justification for active groundwater
treatment. However, if historical data indicate a record of consistently elevated concentrations, then we expect that the ADEC will want to see more aggressive action. It is possible that more aggressive action could include additional data collection in the nearby stream to better characterize potential migration.
|
Louis Howard |
| 5/7/2010 |
Document, Report, or Work plan Review - other |
Staff reviewed and commented on the October 15, 2009 Meeting Minutes SS003, SS008, and SS011, Tatalina LRRS. ADEC concurs with the conceptual preferred remedies which will be incorporated in a future Proposed Plan and Record of Decision for these three source areas (SS003, SS008, SS011).
Site SS003:
* Institutional Controls with Long Term Monitoring as a remedial alternative for groundwater at site SS003.
* Vegetative cap consisting of grasses and/or plants native to Alaska will be used to address stained [petroleum constituents only] surface soil in the areas were analytical results indicate the presence of remnant petroleum hydrocarbons (predominantly within the bermed areas where the former storage tanks were located).
Site SS008:
* Actively remediate the area with PCB concentrations exceeding cleanup levels.
* Actively treat sediment near the culvert(s) that contain pesticides.
* Evaluate potential for active remedial action regarding groundwater based on summary of results for the monitoring well with at least one concentration exceeding Method 2 levels
Site SS011:
* Remove any existing visible drums within the area investigated in 2008
* Vegetative cap consisting of grasses and/or plants native to Alaska will be used to address stained [petroleum constituents only] soil associated with the visible drum
While ADEC may comment on other state and federal laws and regulations, our comments do not relieve responsible persons from the need to comply with other applicable laws and regulations.
|
Louis Howard |
| 8/31/2011 |
Update or Other Action |
Draft Proposed Plan received for SS003, SS008, SS011 & LF004. SS003. CERCLA Section 101 (14) excludes certain substances from the definition of hazardous substance, thus exempting them from CERCLA. These substances include petroleum, meaning "crude oil or any fraction thereof." The EPA interprets this to include hazardous substances that are normally mixed with or added to crude oil or crude oil fractions during the refining process. Contamination resulting from spills of heating oil, diesel fuel, jet fuel, & gasoline are exempt from CERCLA. However, contamination caused by petroleum spills are regulated under Alaska Administrative Code, Title 18, Chapter 75 (18 MC 75), Oil & Other Hazardous Substances Pollution Control.
The primary area of SS008 consists of Waste Accumulation Area (WAA) Number 4 & the area of targeted remediation is approximately 10,000 square feet. This site is located at Lower Camp. PCB detection above ADEC cleanup levels, collected from the surface soil of a boring. Most notably, one monitoring well had free product during the 2002, 2003, & 2004 investigations. The 2002 & 2003 reports concluded that the free product was isolated, & confined to the base or toe of the slope of the hill.
In 2004, DRO was detected in a monitoring well downgradient from the well with free product, most likely representing migration of contaminants. DRO results ranged from not detected to 2.1 mg/L. The petroleum contamination at this site is not subject to CERCLA reporting, response, or liability requirements; therefore, no action is proposed under CERCLA. Treatment of PCB contaminated soil is subject to CERCLA requirements.
The risk assessment found that exposure pathways were complete for both current & future site workers, trench workers, & recreational hunters for surface soil (SS003, SS008, & SS011) & GW (SS003 & SS008). Results of the ADEC-approved human health risk assessment indicate there is a risk to site workers from Aroclor 1260 (SS008).
The COPCs identified in surface soil at SS008 consist of PHCs & associated compounds, as well as PCBs at one sampling location. Given the very different nature of the two types of COPCs, separate detailed analysis of the PHC & PCB remedial technologies was performed. In keeping with that approach, separate evaluation of alternative for PHCs & PCBs are presented below.
For SS008, the preferred surface soil remedial alternative for PHCs is Bioremediation through in situ landfarming. Given the limited amount of soil impacted by PCBs, the preferred surface soil remedial alternative for PCBs is Excavation with Off-site Landfilling at a TSCA Facility. Excavation is considered high for overall protection of human health & the environment by eliminating PCB concentrations at the site. Off-site Disposal removes PCBs from the site & was ranked high for compliance with ARARs. PCB-contaminated soil would be excavated until remaining concentrations are below the site-specific RBCL of 1 mg/Kg. The amount of soil contaminated with PCBs above 1 mg/Kg is estimated at 10 tons. The excavated material would be placed into drums or supersacks for transport off-site. Removal of the contaminated soil would be confirmed by sampling. Clean fill (soil) from a local source would be used to backfill the excavated area.
For SS008, the preferred GW remedial alternative is ICs with Long-term Monitoring. ICs would serve to effectively reduce human exposure to GW by preventing future development of the GW resource in the area; therefore, it is rated high for overall protection of human health & the environment. There are no known Location-Specific or Action-Specific requirements applicable to the remedial alternatives evaluated for SS008. ICs were rated high for compliance with chemical-specific applicable requirements.
In addition to the above ICs, the following proposed activities would be conducted:
A land survey would be conducted at ERP Sites SS003, 8S008, SS011, and LF004 to identify site boundaries. This information would be used to update land records and the Tatalina LRRS comprehensive map and Base Master Plan. Any activity that is inconsistent with IC requirements, objectives, or controls, or any action that might interfere with protectiveness of the ICs, would be addressed by the Air Force as soon as practicable after discovery. In no instance would ADEC be notified later than 10 days after the Air Force becomes aware of a deficiency.
The ICs at a site would extend indefinitely, to ensure that human and ecological receptors are protected from potential exposures. Periodic reports of IC monitoring would be prepared at a frequency of at least once every 5 years and provided to ADEC on an informational basis only with copies filed in the Administrative Record. |
Louis Howard |
| 12/22/2011 |
Document, Report, or Work plan Review - other |
Air Force responses to ADEC comments received.
General Comments:The number of acronyms will be reduced. Acronyms that are not used multiple times will be eliminated. A glossary will be added to the end of the document.
Page 2 and 3: Disagree. The PRGs, which based on risk –based cleanup levels (RBCLs) calculated according to ADEC methods, were not part of the baseline risk assessment, but were presented in the FS (RBCLs calculated in Appendix A of the final FS). The PRGs are considered preliminary until they are finalized as cleanup standards in the Record of Decision.
Page 8: A. The following sentence will be inserted to describe the depth to groundwater: “Depth to groundwater at this site ranged from 12.85 ft bgs to 7.70 ft bgs in 2003” The text will be modified to indicate the subsurface soil pathway is incomplete and will not be considered further.
Figure 3: A note will be placed in the legend that all results exceed PRGs and the PRG table will be referenced.
The following text will be added: “The source of this DRO contamination is unknown, but was evident by the petroleum odor and staining found in 1997. No further delineation or surface water samples were collected.”
Figure 4: A. Investigations into PCE and PCB contamination indicated that these contaminants were not found throughout the site. These individual locations were not well delineated and will need to be field screened and/or laboratory tested during remedial action.
With respect to PCE, the sediment sampling location was at the outlet of a drain pipe. The following text will be added: “Surrounding boreholes to the sediment sample did not encounter groundwater, but there was no PCE present in the soil samples.”
BH-21: The following text will be added: “Eleven boreholes were completed in 1997 and 1999. Only one had PCB contamination. This is likely an isolated occurrence due to the borehole’s isolated location in a small clearing.”
Page 12 LF004: The text will be corrected to say: “No contaminants of concern were detected above ADEC method two cleanup levels for surface soil, subsurface soil, groundwater, or downgradient surface water and sediment samples.”
Page 13: E. The RAOs section will be modified to more accurately summarize the RAOs that were included in the final FS.
Table 2: The tables will be modified to reflect use of TSCA-permitted facilities for PCBs in soil and non-TSCA permitted facilities for petroleum-impacted soil.
Page 15: Details of soil treatment methods will be specified in Remedial Action Work Plans, to be developed after the alternatives are selected and the Record of Decision is finalized.
Page 16: The cited sentence will be modified to read: “This would result in a reduction of COPC concentrations through volatilization and enhanced microbial metabolization of hydrocarbons adsorbed to soil.”
Page 17: C. The cited sentences will be modified to read: “…community acceptance will be evaluated after the comment period, and public comments will be addressed in the ROD. The preferred alternatives may change in response to public comment or new information.”
Table 3: A. Tables for comparative analysis of groundwater will be added for sites SS003 and SS008.
Table 3 Natural Attenuation: Natural attenuation is a passive remedy that utilizes naturally-occurring treatment mechanisms to degrade contaminants and decrease concentrations. Although it is not an active treatment method, it does include treatment as well as monitoring. The scoring for natural attenuation will not be modified, consistent with the Final FS, although a footnote will be added to the scoring for “Reduction of Toxicity…” noting that passive treatment mechanisms are utilized.
Table 4: A. The basis of PRGs is listed in the key “PRG – preliminary remediation goal, based on the risk-based cleanup level.” There is no reference to Table C because the PRGs for groundwater are based on the risk based cleanup levels.
See response to comment 2, part D. PRGs will be finalized as cleanup levels to be specified in the ROD. The values in the Proposed Plan are “Preliminary” because they have not been finalized, and because this is the opportunity for state and public comment on these values.
Table 7: B. PCE was not carried through as a COPC/COPEC during the HHERA because the screening benchmarks were not exceeded. PCE results will be removed from Figure 4. Lead will be added to Table 7 with ADEC Method 2, Table C cleanup goal of 0.015 mg/L.
Page 22 LF004: Text will be modified to say “The landfill is not lined; therefore, ICs alone do not meet the long-term effectiveness criteria as a potential leachate problem would go undetected.” |
Louis Howard |
| 6/13/2012 |
Update or Other Action |
Pre-Draft ROD for SS003, SS008, SS011, LF004 received via electronic mail. Sites SS003, SS008, SS011, and LF004 at Tatalina LRRS cannot support unlimited use and unrestricted exposure due to hazardous substances and contaminants remaining in place after implementation of the selected remedy. Land use restrictions are required as part of this response action and will be achieved through imposition of LUCs that limit the use and/or exposure to those areas of the propery, including water resources, that are contaminated.
At ERP Site SS008, surface soil will undergo Bioremediation through In-situ Landfarming
(down to 2 feet bgs). This will be accomplished over a 2-year period, including application of
nutrients and routine tilling and sampling. A detailed delineation will be completed to determine the extent of light non-aqueous phase liquid (LNAPL) contamination present in the vicinity of Monitoring Well BH37/MW.
To restrict current and future access or exposure to soil and groundwater at all four ERP Sites,
the following proposed ICs would be implemented:
- The Tatalina LRRS comprehensive map and Base Master Plan would be updated to show the boundaries of each site to restrict excavation of soil and disturbance of soil covers, as
well as to prevent access to groundwater. The Base master Plan would contain a map indicating site location, with restrictions on any invasive activities that could potentially expose contaminants. Dig permits issued by the Base Operating Contractor are required for any excavation at Tatalina LRRS. Excavation, disturbance, or relocation of contaminated soil and groundwater; and excavation or drilling in areas of groundwater contamination, will be restricted by the ICs. Relocation of petroleum-contaminated soil will require prior ADEC approval. Use or removal of petroleum-contaminated groundwater will require characterization and be managed by the applicable regulations.
Prior to approving a permit, the Tatalina LRRS comprehensive map and Base Master Plan would be reviewed to ensure that invasive activities are not taking place within the boundary of the sites where land use has been restricted. A Notice of Environmental Contamination will be placed on State (Alaska Department of Natural Resources) land records.
- The ICs will be documented in the Air Force Real Property Records, Tatalina LRRS
General Plan, and 611th IRP Records. This will include: information about current land
uses and allowed uses (prohibiting future residential land use), geographic boundaries of
the ICs, an inspection of the site and submittal of a performance report on ICs to ADEC
at least once every 5 years after the date of the signed decision document, submittal of a
long-term monitoring sampling plan and subsequent sampling reports to ADEC for
approval prior to removal of ICs.
- Long-term monitoring and IC management of soil and groundwater conditions will be
discontinued once the cleanup levels for petroleum have been met for two consecutive
sampling events. ICs will remain in effect until it is demonstrated the sites are suitable for
unrestricted use/unlimited exposure per ADEC concurrence.
- The Air Force would notify ADEC prior to making any major changes to the Base Master
Plan that could affect the ICs.
- The Air Force would obtain prior concurrence from ADEC to terminate the ICs, modify
current land use, or allow anticipated actions that might disrupt the protectiveness of the
ICs. In the unlikely event that the property is to be transferred, the Air Force would notify
ADEC prior to any transfer taking place and would ensure any ICs are incorporated into
the land transfer documents.
- 5-year reviews would be conducted to evaluate the effectiveness of the remedies.
In addition to the above ICs, the following proposed activities would be conducted:
- A land survey would be conducted at ERP Sites SS003, SS008, SS011, and LF004 to identify site boundaries. This information would be used to update land records and the Tatalina LRRS comprehensive map and Base Master Plan. Any activity that is inconsistent with IC requirements, objectives, or controls, or any action that might interfere with protectiveness of the ICs, would be addressed by the Air Force as soon as practicable after discovery. In no instance would ADEC be notified later than 10 days after the Air Force becomes aware of a deficiency.
- The ICs at each site would extend indefinitely, to ensure that human and ecological receptors are protected from potential exposures. Periodic reports of IC monitoring would be prepared at a frequency of at least once every 5 years and provided to ADEC, with copies filed in the Administrative Record. |
Louis Howard |
| 1/24/2013 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 73827 name: Former drum dump. This is an auto action that was triggered by an administrative fix to correct reporting problems in the Unranked Sites Report. This is not an actual ETM ranking and no answers were altered within the ETM. The only part of the record affected by this fix may be the ranking dates. (Reese) |
Kristin Thompson |
| 1/31/2013 |
CERCLA ROD Approved |
John Halverson (ADEC) signed Record of Decision.
Based on the results of the FS, the Air Force selected Off-site Disposal through Landfilling for polychlorinated biphenyl (PCB) and tetrachloroethene (PCE) soil contamination at SS008, Long-term Monitoring with ICs for groundwater at SS008 as the selected remedy.
At SS008, an estimated 25 cubic yards of PCB and PCE contaminated soil will be excavated and
disposed of off-site in drums or Super Sacks®. Confirmation sampling will be conducted and
clean fill (soil) from a local source will be used to backfill the excavated areas. A detailed
delineation will be performed near the sediment sample that contained PCE, including
installation of a new monitoring well. Long-term monitoring will be conducted for groundwater
every 5 years until contaminants are below ADEC Table C cleanup levels for two consecutive
sampling events.
The RAOs for SS008 are:
Prevent current and future human and ecological receptor exposure through the ingestion and dermal contact pathways to surface and subsurface soil contaminated with PCBs that exceed 1 mg/Kg.
Prevent current and future site workers, trench workers, and recreational visitors exposure through the ingestion pathway to groundwater contaminated with 2-methylnaphthalene, lead, and DRO that exceed ADEC Table C cleanup levels.
Prevent mammalian and avian species exposure through the ingestion pathway to surface soil contaminated with DRO, GRO, and RRO that exceed 1,000 mg/Kg, 323 mg/Kg, and 11,000 mg/Kg, respectively.
Prevent mammalian and avian species exposure through the ingestion pathway to sediment contaminated with PCE, DRO, and RRO that exceed 0.024 mg/Kg, 265 mg/Kg, and 22 mg/Kg, respectively. |
John Halverson |
| 1/31/2013 |
Cleanup Plan Approved |
John Halverson signed the Record of Decision for SS008.
At SS008, surface soil will undergo Bioremediation through In-situ Landfarming (down to 2 feet
bgs). This will be accomplished over a 2-year period, including application of nutrients and
routine tilling and sampling. A detailed delineation will be completed to determine the extent of light non-aqueous phase liquid (LNAPL) contamination present in the vicinity of Monitoring
Well BH37/MW through characterization of the product and product skimming. The major
components of the selected response action will be implemented to restrict current and future
access or exposure to soil and groundwater at SS003 and SS008.
The RAOs for SS008 are:
? Prevent current and future human and ecological receptor exposure through the ingestion
and dermal contact pathways to surface and subsurface soil contaminated with PCBs that
exceed 1 mg/Kg.
? Prevent current and future site workers, trench workers, and recreational visitors
exposure through the ingestion pathway to groundwater contaminated with 2-
methylnaphthalene, lead, and DRO that exceed ADEC Table C cleanup levels.
? Prevent mammalian and avian species exposure through the ingestion pathway to surface
soil contaminated with DRO, GRO, and RRO that exceed 1,000 mg/Kg, 323 mg/Kg, and
11,000 mg/Kg, respectively.
? Prevent mammalian and avian species exposure through the ingestion pathway to
sediment contaminated with PCE, DRO, and RRO that exceed 0.024 mg/Kg, 265 mg/Kg,
and 22 mg/Kg, respectively.
|
John Halverson |
| 1/31/2013 |
Long Term Monitoring Established |
The remedies for SS008 include: Excavation of PCB/PCE-contaminated soil with Offsite Disposal; Bioremediation (through in-situ landfarming) of PHC-contaminated surface soil, long-term monitoring of groundwater, and ICs for all media. The presence of LNAPL contamination in BH37/MW will be documented during the remedial design and implementation phase through characterization of the product and product skimming. After additional information is collected, a determination will be made about the migration of contamination and an appropriate remedial action will be completed with the approval of ADEC, if necessary.
In addition, at SS008, a detailed delineation will be done for the occurrence of free product in
Monitoring Well BH37/MW. A new monitoring well will be installed in the vicinity of the PCE
contamination in the southwest area of the site to determine potential groundwater impacts from
PCE. Due to the uncertainty that free product will remain present in Monitoring Well BH37/MW
and the potential impact to groundwater from PCE, a remedy cannot be selected at this time.
However, after additional information is collected, a determination will be made about the
migration of contamination and an appropriate remedial action will be completed with the
approval of ADEC, if necessary. The actual technologies and sequence of technologies used for
the treatment system will be determined during the remedial design. Final selection of these
technologies will be based on additional site information to be collected during the remedial
design. Based on this additional information and sound |
John Halverson |
| 1/31/2013 |
Institutional Control Record Established |
The ICs at SS003, SS008, SS011, and LF004 will reduce human or environmental exposure to
contamination, and prevent activities that may result in increased exposure or spread the extent
of contamination. The principal threat waste at SS008 is soil contaminated with PCB and PCE.
ICs will reduce human and ecological exposure to groundwater at SS003, SS008, and LF004 by
preventing future development of groundwater resources in the area
The Air Force will implement, monitor, maintain, and enforce the ICs identified below in
accordance with State of Alaska 18 Alaska Administrative Code (AAC) 75.375 Institutional
Controls. The 611th Civil Engineering Squadron will be the point of contact for ICs. The major
components of the selected response action will be implemented to restrict current and future
access or exposure to soil and groundwater at these four ERP Sites. |
John Halverson |
| 3/20/2013 |
Update or Other Action |
This Technical Project Report details the implementation of Environmental Long Term Management (LTM) actions for Sites LF004, SS002, SS003, and SS008, Tatalina Long Range Radar Station (LRRS) in Sterling Landing, Alaska.
The SS008 land survey performed 6 August 2012 includes limited results because the site entrance from the access road leading to SS008, along with the site itself, were found to be
densely overgrown with vegetation, and the field crew was unable to get through the vegetation
and brush to access site. The SS008 land survey results included the outline of the SS008 well
building along the access road, and the centerline of the Sterling Landing Access Road leading
from SS008 to SS002. There were 34 coordinate points collected at SS008.
Photos 8 and 9 were taken at SS008. Photo 8 is a view of the access road leading to SS008, and
the SS08 well building adjacent to the densely overgrown SS008. Photo 9 shows SS008, facing
east, and the heavy vegetation which has occurred at the site, making any distinguishable site
features non-discernable. |
Louis Howard |
| 3/18/2015 |
Update or Other Action |
One of several sites with Land Use Controls in effect (LUC Mgt Plan 2015 Pacific Air Forces Regional Support Center Installations, JBER, AK) March 13, 2015.
In addition to ICs established as part of LUCs of the ERP for landfill sites with LUCs in effect, both ERP landfill & non-ERP landfill sites in Alaska under the management of PRSC must also comply with regulations set forth by the ADEC solid waste regulations in 18 AAC 60. Furthermore, landfill sites under the management of PRSC but not categorized as an ERP site must also comply with ADEC 18 AAC 60. Table 1-3 describes PRSC non-ERP landfill sites.
Landfills are defined in 18 AAC 60 as “an area of land, or an excavation in which solid wastes are placed for permanent disposal, & that is not an application site, injection well, reserve pit, or waste pile.” This definition applies to most PRSC ERP & non-ERP sites in Alaska designated as landfills, dumps, or caches. Small PRSC ERP & non-ERP landfill sites at remote installations, such as the long-range radar stations, are regulated as Class III landfills as defined by ADEC.
General requirements to manage landfills in place are established by ADEC & included in Table 2-2. However, alternative criteria can & often are adopted through negotiation with ADEC (see 18 AAC 60.900, Waivers). Post-closure notification requirements for Class III landfills, including notifications to ADEC & to potential future landowners, are summarized in Table 2-3. Tables 2-2 & 2-3 both generally assume the subject landfill is closed, has been reasonably well characterized, & a monitoring program for media of concern has been established & approved by ADEC.
Tatalina LRRS Hardfill No. 2, Morrison-Knudsen Debris Area, Northeast Landfill DP005
Tatalina LRRS Landfill No. 2 LF004
Tatalina LRRS WAA No. 2 & Upper Landfill No. 1 LF010
Tatalina LRRS Former WACS Facility OT012
Tatalina LRRS Minimally Attended Radar Site SS001
Tatalina LRRS Barge Landing & Fuel Storage Area SS002
Tatalina LRRS Spill/Leak No. 1, 2 ,3, 4, Lower Camp Former T/F SS003
Tatalina LRRS WAA No. 3 SS007
Tatalina LRRS WAA No. 4 SS008
Tatalina LRRS Former Truck Fill Station SS009
Tatalina LRRS WAA No. 1 SS011
LUC_RESTRICTION a) The site well permitting system will prevent any use of groundwater for drinking water.
b) The site construction review process will prevent damage to existing monitoring wells.
c) All ROD use limitations and exposure restrictions will be entered in the Base Master Plan and the Geographical Information System.
d) The site construction review process will be used to avoid ground-disturbing construction activities and to ensure safe soil management procedures in areas with residual contamination.
e) The site digging permit system will be used to avoid activities that could breach the landfill cover.
f) The site Environmental Impact Analysis Process will be used to assess the potential environmental impact of any action proposed at the site |
Louis Howard |
| 9/4/2015 |
Update or Other Action |
Draft SC & Delineation work plan received for review & comment.
The site characterization & delineation efforts to be performed at SS008 are described below.
Tetrachloroethylene (PCE) Impacted Sediment
Ten (10) soil borings will be installed to a depth of 12 feet to delineate the extent of PCE impacted soil as shown on Figure 3. Two (2) soil samples will be collected from each boring for analysis of VOC concentrations.
One (1) monitoring well will be installed to a total depth of twenty (20) feet below ground surface (bgs) in a down-gradient location of the PCE impacted sediment. GW samples will be collected from the well for analysis of VOC concentrations to determine potential GW impacts from the known PCE contamination.
Light Non-Aqueous Phase Liquid (LNAPL) Petroleum Contamination Near Monitoring Well BH37/MW
Ten (10) soil borings will be installed to a depth of ten (10) feet bgs in vicinity of well BH37/MW to enable a detailed delineation of the extent of the free product LNAPL through product characterization & product skimming (Figure 3). Soil samples will be collected from the borings at the GW interface for analysis of DRO concentrations.
Soil boring cores will be continuously field screened utilizing a photoionization detector (PID), as well as visual & olfactory observations. The collection of soil samples for the PCE delineation will be determined based on an understanding of site conditions & the contaminant detection history, combined with visual & olfactory observations. Soil samples for the DRO investigation will be collected from the GW interface in the borings.
One GW sample will be collected from the newly-installed well down-gradient of the PCE contamination (Figure 3). The GW sample will be submitted for analysis of VOCs. Analytical samples for soil & GW will be collected & sent to an ADEC & Department of Defense (DoD) Environmental Laboratory Accreditation Program (ELAP) approved analytical laboratory.
See site file for additional information. |
Louis Howard |
| 9/24/2015 |
Document, Report, or Work plan Review - other |
Staff provided comments on the draft work plan. Main comments were not to sample groundwater for volatile compounds with a bailer or peristaltic pump since this would bias the sample results low and to update references to qualified environmental professional and qualified sampler instead of the outdated reference to a qualified person. |
Louis Howard |
| 10/8/2015 |
Document, Report, or Work plan Review - other |
Staff approved the work plan for SS008. |
Louis Howard |
| 1/5/2016 |
Update or Other Action |
Report for Environmental Long Term Monitoring at Tatalina LRRS Sites received for review and comment.
SS008
The IC inspection at Site SS008 noted that the area is accessed annually to maintain the vegetation growth. Materials are stored long term adjacent to the site. No warning or restriction signs were present. No intrusive activities were observed that would expose contaminated waste.
Monitoring well BH37/MW was found to be damaged. BH/MW02-29 appears to have been decommissioned. Both of these wells could not be sampled as planned due to their condition. Two alternative monitoring wells (BH/MW02-27 and BH/MW02-28) were located near the planned wells and were sampled in their place.
Results of the groundwater monitoring conducted at Site SS008 indicated that DRO was not detected or was detected at concentrations below the ADEC Cleanup Level at all locations sampled. If DRO results from the next LTM event show that concentrations in groundwater at SS008 are below the applicable cleanup level and ROD objective, it is recommended that sampling for DRO be discontinued at this Site. |
Louis Howard |
| 2/4/2016 |
Document, Report, or Work plan Review - other |
Staff provided comments on the draft report for environmental long-term monitoring at several sites which includes this one. After reviewing the information presented, it appears the institutional controls at LF004, SS002, SS003, SS008, and SS011 are working as designed. See site file for additional information.
Staff requested analysis of DRO, lead, 2-methylnaphthalene, EDB, and PCE for the next groundwater sampling round since these were mentioned in the ROD as contaminants of concern.
See site file for additional information. |
Louis Howard |
| 4/5/2016 |
Update or Other Action |
Draft RA Construction Activities SC Delineation Report received for SS008. The field team advanced 9 soil borings at the LNAPL investigation, collecting one soil sample from each boring at the GW interface. The results of the LNAPL measurements in the soil boreholes indicate that the lateral extent of the petroleum LNAPL in vicinity of monitoring well BH37/MW was adequately defined. Free product LNAPL was measured in only BH106 & BH107, the two borings immediately downgradient of the monitoring well. In addition, the analytical results for the samples from borings BH102 & BH103 also present evidence that the soil investigation delineated the down-gradient extent of the DRO-impacted soil. The analysis of the GW samples at BH37R/MW verifies that DRO is the contaminant of concern for the free product LNAPL contamination.
A total of 13 soil borings were advanced in the PCE characterization area in order to delineate the extent of impacted soil around the contaminated sediment sample. The presence of the sediment contamination immediately below the drainage pipe outfall necessitated investigation of the area up-gradient of the contamination in the area of the former WAA No. 4. As a result, the field team advanced 4 investigative borings upgradient in the former WAA & 9 borings in vicinity of & surrounding the impacted sediment area.
PCE contamination was detected in borings BH52, BH53, & BH54. Borings BH53 & BH54 were located down the 4-wheel drive trail from BH52 & the impacted sediment area. The contaminant & the subsequent degradation products were not detected in any of the borings further down-gradient of those three borings. The results provide evidence that the extent of the PCE contamination is limited to the top 6 to 8 ft of soil within approximately 100 ft down-gradient of BH52.
In addition to the PCE contamination, the expedited PID screenings & field observations of the soil cores from the PCE delineation effort indicate areas of petroleum hydrocarbon impact in the investigation area. Analysis of the soil samples detected several petroleum VOC compounds in the soil, including benzene contamination at borings BH50 & BH55. In accordance with the investigation strategy, the soil samples collected from the borings in this area were submitted for analysis of VOC concentrations, as the objective was to characterize & define the extent of the PCE impact. However, the results of the laboratory analysis indicate that the soil has also been adversely impacted with petroleum hydrocarbon compounds.
The selected remedy in the 2013 ROD for this PCE area was to perform this delineate & then remediate the PCE contamination. A statutory review is planned to be conducted within 5 years of the 2015 remedial action to ensure that the remedy continues to be protective of human health & the environment. Subsequent 5 year reviews are planned to be conducted at the site until sample results indicate that cleanup levels are met.
See site file for additional information. |
Louis Howard |
| 4/7/2016 |
Document, Report, or Work plan Review - other |
Staff reviewed and approved the Draft 2015 Site Characterization and Delineation Report – SS008 Remedial Action-Construction Activities At Tatalina LRRS dated March 2016. However, the were contaminants detected in several borings: BH55 which exceeded cleanup criteria (benzene, ethylbenzene, xylenes and 1,2,4-trimethylbenzene), BH50 (benzene) and BH52 (hexachlorobutadiene). ADEC believes these contaminants will need to be characterized further since the 2013 ROD did not establish a cleanup criterion for these VOCs at SS008. Please provide additional clarification on how you will address these non-ROD contaminants. |
Louis Howard |
| 4/8/2016 |
Update or Other Action |
Draft UFP-QAPP WP for implementing remedial actions at SS003, SS008, SS011, SR001.
ROD text for selected remedy: "The remedies for SS008 include: Excavation of PCB/PCE-contaminated soil with Offsite Disposal; Bioremediation (through in-situ landfarming) of PHC-contaminated surface soil, long-term monitoring of groundwater, and ICs for all media. The presence of LNAPL contamination in BH37/MW will be documented during the remedial design and implementation phase through characterization of the product and product skimming.
After additional information is collected, a determination will be made about the migration of contamination and an appropriate remedial action will be completed with the approval of ADEC, if necessary. These remedial actions were selected based upon their ability to protect human health and the environment and compliance with applicable requirements and ARARs These remedies provide the best balance among the balancing criteria and appear consistent with comments received from the public and ADEC. The remedies are easily implemented, are cost effective, and are both a short and long-term solution for contamination at the site."
WP: Approximately 20,000 square feet of surface soil excavated from previously-identified POL hot
spot locations will undergo bioremediation through in-situ landfarming to 2 feet below bgs.
Landfarming will occur over a 2-year period, including application of nutrients and routine
tilling and sampling. The analytical results from soil samples collected throughout this 2-year
period will be used to monitor the performance of the landfarming effort and to verify when the
concentrations of the COCs are below their respective site-specific cleanup levels (see
Worksheet #15). Landfarm soil samples will be submitted for the following analyses: GRO and
DRO.
Approximately 50 cubic yards of PCB- and PCE-contaminated soil will be excavated, placed in
drums or Super Sacks®, and transported off-site for disposal at a permitted Toxic Substances
Control Act (TSCA) treatment, storage, and disposal (TSD) facility. Excavation will continue
until analytical results from confirmation soil samples collected from the floor and sidewalls of
each excavation indicate remaining concentrations of PCB and PCE are below their respective
site-specific cleanup levels (see Worksheet #15) or until the proposed soil volume of 50 cubic
yards has been removed (whichever is completed first).
The excavations will then be backfilled with locally-available clean soil and re-contoured and re-vegetated to match surrounding natural conditions. Confirmation soil samples will be submitted for the following analyses: PCB (Aroclor 1260 only) and VOC (PCE only). Drums or Super Sacks® containing PCB- and PCE contaminated soil will be transported to Sterling Landing and staged in a lined containment area prior to being loaded onto barges for transportation to the disposal facility.
See site file for additional information. |
Louis Howard |
| 6/26/2017 |
Update or Other Action |
RA Construction report received for review & comment. At all landfarming cells located in sites SS003 & SS008, the work plan specifies landfarming will be conducted over a 2-year period, including application of nutrients. Analytical results from baseline samples collected after the initial tilling event indicated site-specific cleanup levels have been achieved, & further tilling (& the application of nutrients) will not be necessary.
At site SS008, the 2016 Work Plan specified 50 cubic yards of PCB-contaminated soil will be excavated. The final amount of soil removed was 58 cubic yards. The 2016 Work Plan specified sampling for only PCBs in the floors & sidewalls of the PCB soil excavations. Based on review of the 2013 ROD, & conversations with the ADEC about historical POL contamination at this site, DRO & RRO analyses were added to the sampling protocol.
Concentrations of COCs continue to be above their respective site-specific and ADEC Table B1 Method 2 Soil Cleanup Levels in both excavations (BH-8 and BH-21) in SS008, as well as in the excavation in SS011. Further action is therefore required at locations SS008 and SS011.
See site file for additional information. |
Louis Howard |
| 8/14/2017 |
Update or Other Action |
Draft 2017 Supplemental Work Plan W911KB-14-D-0007-0008 Remedial Action Operations, Land Use/Institutional Control received for review and comment. Conduct and document a visual inspection of ICs as specified LF004 in Section 1.2.1. Collect groundwater samples at five monitoring wells and analyze for DRO by Alaska Method (AK) 102. Monitoring Wells BH3/MW, BH54MW, BH11/MW, BH29R/MW and BHMW37R/MW will be sampled. Sampling will be conducted in accordance with the 2012 Work Plan as specified for Site SS002.
See site file for additional information. |
Louis Howard |
| 2/12/2019 |
Document, Report, or Work plan Review - other |
Staff approved the draft project report and requested future sampling of groundwater for volatile organic compounds (VOCs) not use a peristaltic pump or bailer which would bias the results low. |
Louis Howard |
| 2/3/2021 |
Update or Other Action |
Bulk action entry - all Tatalina LRRS sites x-referenced with the general file, 2655.38.001, on this date. |
Cascade Galasso-Irish |
| 4/9/2021 |
Document, Report, or Work plan Review - other |
Staff reviewed "Draft Project Activities Management Plan For Remedial Action - Construction at SS008 and SS011, March 2021." The draft was returned to USAF with comments for review and correction. The plan for SS008 detailed the plan for two PCB excavations and confirmation sampling/backfilling of site after removal below the 1 mg/kg cleanup level. The plan for SS011 detailed a removal of DRO contaminated soil and landfarming based treatment. |
Axl LeVan |
| 5/3/2021 |
Document, Report, or Work plan Review - other |
Staff provided comments on the Draft 2021 Remedial Action-Operation and Long-Term Management Work Plan, Tatalina Long Range Radar Station, Sites LF004, SS002, SS003, SS008, and SS011, March 2021. The Work Plan described the approach and procedures for site-specific long-term management and remedial action-operation activities at Tatalina long-range radar site, including annual groundwater sampling for sites SS002 and SS008. The Work Plan covers work being performed over a 5-year period and will be reviewed on an annual basis between field seasons. |
Axl LeVan |
| 5/11/2021 |
Document, Report, or Work plan Review - other |
Staff backchecked the "Draft-Final Project Activities Management Plan For Remedial Action - Construction at SS008 and SS011, April 2021." The majority of the Airforce responses to comments were accepted. The revised document was returned to USAF with additional comments for review and correction. The plan for SS008 detailed the plan for two PCB excavations and confirmation sampling/backfilling of site after removal below the 1 mg/kg cleanup level. The plan for SS011 detailed a removal of DRO contaminated soil and landfarming based treatment. |
Axl LeVan |
| 5/19/2021 |
Meeting or Teleconference Held |
Staff attended a comment resolution meeting with USAF regarding the DEC Backcheck of the 2021 Draft-Final Project Activities Management Plan, Remedial Action - Construction, Tatalina Long Range Radar Station, Sites SS008, and SS011, March 2021. The meeting primarily focused on adding appropriate Chemical of Concern including PAHs and DRO to final confirmation sampling at the site. DEC and USAF came to an agreement about the comments and a final version of the document will be sent for regulator review. |
Axl LeVan |
| 5/26/2021 |
CERCLA Removal Action Plan |
Staff reviewed and sent approval letter for the "Final Project Activities Management Plan For Remedial Action - Construction at SS008 and SS011, May 2021." All DEC comments were addressed by the Final document. The plan for SS008 detailed the plan for two PCB excavations and confirmation sampling/backfilling of site after removal below the 1 mg/kg cleanup level. The plan for SS011 detailed a removal of DRO contaminated soil and landfarming based treatment. |
Axl LeVan |
| 6/22/2021 |
Document, Report, or Work plan Review - other |
DEC provided comments for the Draft 2020 Remedial Action-Operation, Institutional Control/Land Use Control Report, Tatalina Long Range Radar Station, Alaska, Sites LF004, SS002, SS003, SS008, and SS011, March 2011. The Alaska Department of Environmental Conservation Contaminated Sites Program received a copy of the above referenced document on May 24, 2021. The report presents the results and recommendations of the 2020 Environmental Long-Term Management (LTM) program at the Tatalina Long Range Radar Station (LRRS). The 2020 LTM activities included annual visual inspection of site intuitional controls/land use controls at Sites SS002, SS003, LF004, SS008, and SS011. Annual groundwater sampling also took place at Site SS002 and Site SS008. All efforts took place in August of 2020. |
Axl LeVan |
| 8/20/2021 |
Update or Other Action |
DEC reviewed and approved "Contaminated Media Transport and Treatment or Disposal Approval Forms" for SS008 and SS011 soil waste and SS011 liquid. Soil will be disposed of at the Chemical Waste Management of the Northwest. |
Axl LeVan |
| 8/23/2021 |
Update or Other Action |
DEC reviewed and approved a field change form for the "Final Remedial Action-Construction Project Activities Management Plan, Sites SS008 and SS011, Tatalina Long Range Radar Station, Alaska, May 2021". The Field Change Form outlined a plan for additional sampling at 10, 25, and 50 foot intervals from sidewalls of the SS008 excavation still containing PCB contamination. DEC noted that the samples depth (0-0.5 feet below ground surface) will not capture the true vertical delineation and that the samples would not be considered a full characterization of the remaining contamination regardless of the results. However, DEC recognizes that the additional information may inform USAF regarding future estimates for additional removals and approved of the sampling for this purpose. |
Axl LeVan |
| 9/8/2021 |
Document, Report, or Work plan Review - other |
DEC approved the Final 2020 Remedial Action-Operation, Institutional Control/Land Use Control Report, Tatalina Long Range Radar Station, Alaska, Sites LF004, SS002, SS003, SS008, and SS011, September 2021. The Alaska Department of Environmental Conservation Contaminated Sites Program received a copy of the above referenced document on September 7, 2021. The report presents the results and recommendations of the 2020 Environmental Long-Term Management (LTM) program at the Tatalina Long Range Radar Station (LRRS). The 2020 LTM activities included annual visual inspection of site intuitional controls/land use controls at Sites SS002, SS003, LF004, SS008, and SS011. Annual groundwater sampling also took place at Site SS002 and Site SS008. All efforts took place in August of 2020. |
Axl LeVan |
| 5/12/2022 |
CERCLA Remedial Action Completion Report |
DEC received the "Draft Remedial Action – Construction Report Sites SS008 and SS011, Tatalina Long Range Radar Station, April 2022" on April 4, 2022. DEC reviewed the documented and provided comments to USAF on May 12, 2022. The report summarized remedial action (RA) activities conducted at Sites SS008 and SS011 located at the Tatalina Long Range Radar Station (LRRS), Alaska. RA activities included the removal of PCB contaminated soil at two SS008 locations. At SS011, RA activities were focused on removal of waste containing buried drums and petroleum contaminated soil. |
Axl LeVan |
| 7/26/2022 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (DEC) Contaminated Sites Program received a copy of Draft-Final 2021 Remedial Action-Operation and Long-Term Management Report, Tatalina LRRS Sites LF004, SS002, SS003, SS008, and SS011, Alaska, June 2022 on June 30, 2022. This report presents the long-term management and remedial action-operation (RA-O) activities performed at sites LF004, SS002, SS003, SS008, and SS011 at Tatalina long range radar site (LRRS) between 13 September and 15 September 2021.
|
Axl LeVan |
| 8/24/2022 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (DEC) Contaminated Sites Program received and approved a copy of Final 2021 Remedial Action-Operation and Long-Term Management Report, Tatalina LRRS Sites LF004, SS002, SS003, SS008, and SS011, Alaska, August 2022 on August 23, 2022. This report presents the long-term management and remedial action-operation (RA-O) activities performed at sites LF004, SS002, SS003, SS008, and SS011 at Tatalina long range radar site (LRRS) between 13 September and 15 September 2021. All DEC comments were addressed and appropriate changes were integrated into the document. In the approval letter DEC noted that landfill ponding, an unidentified well at SS003, and riverside erosion near SS002 should be closely monitored moving forward. |
Axl LeVan |
| 10/6/2022 |
Document, Report, or Work plan Review - other |
DEC approved the "Final Remedial Action – Construction Report Sites SS008 and SS011, Tatalina Long Range Radar Station, September 2022" received on October 3, 2022. The report summarized remedial action (RA) activities conducted at Sites SS008 and SS011 located at the Tatalina Long Range Radar Station (LRRS), Alaska. RA activities included the removal of PCB contaminated soil at two SS008 locations. At SS011, RA activities were focused on removal of waste containing buried drums and petroleum contaminated soil |
Axl LeVan |
| 10/28/2022 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 73827 Former drum dump. |
Axl LeVan |
| 8/17/2023 |
Document, Report, or Work plan Review - other |
DEC approved the Final 2022 Five-Year Review for Sites LF004, SS002, SS003, SS008, and SS011 at Tatalina Long Range Radar Station, Alaska, June 2023. The Five-Year review describes the progress since the last Five-Year Review and documents issues and recommendations for the five sites. |
Axl LeVan |
| 8/22/2023 |
Document, Report, or Work plan Review - other |
DEC provided comments on the "Draft-Final 2022 Remedial Action-Operation and Long-Term Management Report, Tatalina LRRS". The report presents the long-term management and remedial action-operation (RA-O) activities performed at sites LF004, SS002, SS003, SS008, and SS011 between 11 August and 13 August 2022. |
Axl LeVan |
| 1/18/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved the "Final 2022 Remedial Action-Operation and Long-Term Management Report, Tatalina LRRS Sites LF004, SS002, SS003, SS008, and SS011, Alaska, January 2024". The report presents the long-term management and remedial action operation (RA-O) activities performed at sites LF004, SS002, SS003, SS008, and SS011 at Tatalina Long Range Radar Site (LRRS) between 11 August and 13 August 2022. |
Axl LeVan |
| 7/3/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comments on the "Draft-Final Environmental Services to Conduct Phase 1 Remedial Investigation of Per- and Polyfluoroalkyl Substances, AT016P – Fire Training Area, Tatalina LRRS Sites, Alaska, May 2024". The work plan outlines the field and laboratory work associated with a Per- and Polyfluoroalkyl Substances (PFAS) Remedial Investigation (RI) and Tatalina Long Ranger Radar Station (LRRS) following recommendations from a previous site inspection. |
Axl LeVan |
| 7/9/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved the "Draft-Final 2023 Remedial Action-Operation and Long-Term Management Report, Tatalina LRRS Sites LF004, SS002, SS003, SS008, and SS011, Alaska, April 2024." The report presents the long-term management and remedial action-operation (RA-O) activities performed at sites LF004, SS002, SS003, SS008, and SS011 at Tatalina Long Range Radar Site (LRRS) between the 4th and 5th of September 2023. |
Axl LeVan |
| 7/31/2024 |
CERCLA RI Plan Approved |
DEC reviewed and approved the "Draft-Final Environmental Services to Conduct Phase 1 Remedial Investigation of Per- and Polyfluoroalkyl Substances, AT016P – Fire Training Area, Tatalina LRRS Sites, Alaska, July 2024". The work plan outlines the field and laboratory work associated with a Per- and Polyfluoroalkyl Substances (PFAS) Remedial Investigation (RI) and Tatalina Long Ranger Radar Station (LRRS). |
Axl LeVan |
| 4/15/2025 |
Document, Report, or Work plan Review - other |
DEC reviewed and provided comment on the "Draft 2024 Remedial Action-Operation and Long-Term Management Report, Tatalina LRRS Sites LF004, SS002, SS003, SS008, and SS011, Alaska, April 2025." The report included groundwater sampling at SS008 and SS002. |
Axl LeVan |
| 4/24/2025 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved the "Final 2024 Remedial Action-Operation and Long-Term Management Report, Tatalina LRRS Sites LF004, SS002, SS003, SS008, and SS011, Alaska, April 2025." |
Axl LeVan |
