| Action Date |
Action |
Description |
DEC Staff |
| 3/15/1993 |
Underground Storage Tank Site Characterization or Assessment |
SA1; HUNG: Received 11/93 draft of closure report involving UST removals 9/3 & 9/15 1993. |
Former Staff |
| 7/29/1993 |
Update or Other Action |
NOR; HUNG received phone call from ADCOE re- S.A. performed by Cal Science Engineering for GSA 5/91. S.A. indicates 10,000 gals. gasoline UST leaked and grd. water impacted. Plan on excavating UST end of 8/93 along with 500 gals. waste oil and 500 gals. propane USTs. All USTs have been inoperable for several years. |
Former Staff |
| 7/29/1993 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77952 ADD; Hung: File# 102.26.084 |
Former Staff |
| 7/29/1993 |
Site Added to Database |
|
Former Staff |
| 9/9/1993 |
Site Visit |
FI; Hung did on-site and took approx. 12 photos. There was a possibility of a 14 year old patch on the 10,000 gal. gasoline UST. After further inspection of the bottom of the UST, no patch could be detected. The area of the UST has been contaminated by gasoline and GW impacted. The 500 gal. waste oil UST did not apprear to have a leak. The 500 gal. propane UST was being prepared for burning off the gas prior to excavation. S&W, on-site w/ Knik Construction Co. doing the excavation and purging of all USTs. |
Former Staff |
| 9/15/1993 |
Underground Storage Tank Site Characterization or Assessment |
SA1; HUNG: Received final SA on 11/93 closure report dated May 1994. |
Former Staff |
| 6/6/1994 |
Update or Other Action |
CORR; Wingerter sent letter informing RP of their financial liability under new ADEC cost recovery policy. State is authorized, under Section 9003(h) of the Resource Conservation and Recovery Act to take action on this LUST facility. |
Former Staff |
| 4/25/1995 |
Site Visit |
LFI; 7/91 subsurface investig. rept. on in-place 10,000-gal gasoline UST,rec'd 8/3/93. Conducted/installed (4) SBs & (3) MWs. Soils indicate significant soil contam. around UST, w/in capillary fringe & upper portion of saturated zone. No contam. 50 ft. from UST. MW 1, SW of UST indicate low levels TPH & BTEX (<1 Mg/l). |
Former Staff |
| 4/26/1995 |
Underground Storage Tank Site Characterization or Assessment |
SA1R; 11/93 rept. rec'd 12/2/93 on removal of 10,000-gal gasoline, 500-gal w.o. & 500-gal propane USTs 9/3 & 9/15/93. RP determined to replace soil in pit due to lack of space to stockpile. Soils= DRO=2,600 ppm, GRO=13,000 ppm, Benzene= 29 ppm., w.o.-TPH=470ppm Benzene levels for MW 1=12 ppb, MW 3=750 ppb. |
Former Staff |
| 5/11/1995 |
Release Investigation |
RELR; 3/30/94 Scope svs. for RI, rec'd 5/16/94. RPCON to determine lateral & vertical extent of grd. water contam. in order to develop CAP. Will install (3) more MWs & sample all 6 MWs quarterly in order to gather adequate data for decisions. |
Former Staff |
| 5/12/1995 |
Release Investigation |
RELR; 4/22/94 rept.on sched. & contract submittals for RI on grd. water contam., rec'd 5/16/94. Describes sched. for measuring grd. water levels of (3) MWs, install (3) more MWs 8/15-26/94 and sampling/analyses of all 6 MWs. |
Former Staff |
| 6/6/1995 |
Release Investigation |
RELR; 8/24/94 rept. re-analytical results & prelim. assessmt., rec'd 6/2/95. Grd. water sampling results show Benzene in MW 1=18 ppb, MW 3=45 ppb & MW 2=ND |
Former Staff |
| 6/7/1995 |
Release Investigation |
RELR; 2/7/95 Status rept. & prelim. assessmt.,rec'd 6/2/95. Grd. water sampling shows Benzene exceeds MCLs in all MWs except MW 2. Depth to grd. water is 17-18 ft. bgs, water elevation has decreased 0.3 ft. since 11/94 & grd. water flow direction is to NW.11/28/94 Status rept. & prelim. assessmt.,rec'd 6/2/95. Grd. water sampling event of 11/3/94 shows MCLs are exceeded in MWs 1, 3, 4, 5 & 6. MW 2=ND. Toluene exceeds MCLs only in MW 4. |
Former Staff |
| 6/16/1995 |
Update or Other Action |
UPD; Reviews deferred due to consistent missing reports. |
Former Staff |
| 6/16/1995 |
Leaking Underground Storage Tank Emergency Response |
IA; 3/13/95 RI summary & remediation alternatives rept., rec'd 6/2/95. MW 5 Benzene migrated beyond NW property boundary & not defined. Former gasoline UST area & 20000-gal HOT suspected sources. Suggest SVE & bioventing for soils w/airsparging as mass transfer process. |
Former Staff |
| 10/19/1995 |
Site Visit |
FI; On-site to see removal of 20,000 gal HOT/emergency generator UST. Controversy over Anchorage RPCON sub-contracting w/AGRA and wanting AGRA to limit sampling to only 2 samples. DEC informs Anch. RPCON samples will be taken according to 18 AAC 78 and not limited to 2, but based on expertise of qual. AGRA sampler. |
Former Staff |
| 3/13/1996 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; Three additional MWs installed. Ground water being monitored quarterly. 10/19/95 removed 10,000-gal HOT/emerg. generator UST. Will remove 100+ ft. of piping in '96 or when money available. Planning on installing SVE & bioventing system to treat contam. soils and air sparging for ground water treatment. |
Former Staff |
| 9/27/1999 |
Document, Report, or Work plan Review - other |
ADEC received a report on the Ground Water Treatment System Evaluation. The consultant, Herrera, recommended shutting down the treatment system until the area around the wells is paved and the cracked pavement is repaired. They recommended the installation of two additional monitoring wells further downgradient from MW-5 and MW-3 to better characterize the leading edge of the gw cont. |
Deborah Williams |
| 3/27/2001 |
Document, Report, or Work plan Review - other |
ADEC received a report on the Groundwater monitoring at the site. Some of the conclusions at the site were the AS/SVE has been operated over a period of 5 years. Treatment system operation should be modified to focus cleanup efforts in the vicinity of wells MW-1 and MW-4. Dissolved lead analyses should be included with BTEX and GRO in the next sampling effort. |
Deborah Williams |
| 8/12/2003 |
Document, Report, or Work plan Review - other |
ADEC received the report entitled "Post Treatment System Shutdown Groundwater Monitoring." In the report, Herrera concludes the following: Approximately 25 cubic yards of contaminated soil (GRO and benzene) may remain beneath the former 10,000-gallon gasoline underground storage tank cavity. Measured soil concentrations do not indicate a significant continuing source of GRO or benzene; however, ADEC method two cleanup levels were exceeded. Water quality continues to improve and benzene concentrations did not spike upwards or rebound when the ground water treatment system was shut down in May 2001. Benzene was detected in gw samples collected two of the eight wells sampled in September 2002 at concentrations of 4.7 ug/L (MW-4), and 13 ug/L (VES-6). Both locations are near the former tank and dispenser and may result from residual contamination at the water table around these sources. |
Deborah Williams |
| 11/24/2003 |
Document, Report, or Work plan Review - other |
ADEC received a report entitled "Groundwater Monitoring and Site Closure Report." Herrera makes the following conclusions: Water quality continues to improve; benzene concentrations have not spiked upwards or rebounded since the ground water treatment system was shut down in May 2001. Benzene was detected in groundwater samples collected from two of the eight wells sampled in September 2003 at concentrations of 3.2 ug/L (MW-4), and 7.2 ug/L (VES-6). GRO was detected in ground water samples collected from two of the eight wells sampled in Sept. 2003 at concentrations of 110 ug/L (MW-4), and 7,900 ug/L (VES-6). Based on a limited door to door survey of businesses, apartment buildings, and residences (20 respondents), there was no indication of groundwater usage downgradient of the former Motor Pool. They recommend sampling VES-6 for benzene and GRO in September 2004 and 2005. Sampling for the seven other monitoring wells should be suspended. |
Deborah Williams |
| 1/28/2004 |
Update or Other Action |
Transferred DEC staff lead from John Carnahan |
Cynthia Pring-Ham |
| 2/9/2004 |
Document, Report, or Work plan Review - other |
Reviewed GW Monitoring and Site Closure Report for the Former Motor Pool Fairbanks Federal Building site. Contaminant levels were detected in two of the eight wells sampled in September 2003 at concentrations of 3.2 ppb benzene and 110 ppb GRO (MW-4) and 7.2 ppb benzene and 7,900 ppb GRO(VES-6). Water quality continues to improve; benzene concentrations have not spiked upwards or rebounded since the gw treatment system was shut down in May 2001.
A limited door to door survey of businesses, apartment buildings and residences (20 respondents) was conducted - no indication of gw usage downgradient of the former Motor Pool. |
Deborah Williams |
| 3/25/2008 |
Exposure Tracking Model Ranking |
Initial ranking complete. |
Sharon Richmond |
| 11/13/2008 |
Update or Other Action |
phone call with Miguel Ortega. Site was sampled this summer; report pending. |
Sharon Richmond |
| 4/17/2009 |
Meeting or Teleconference Held |
phone calls, teleconference, emails regarding 2009 field work |
Sharon Richmond |
| 7/24/2009 |
Update or Other Action |
Completed file review and review of recently submitted documents (historical site sumary and 2008 gw monitoring report. GW concentrations of benzene and GRO below DEC cleanup levels for 1st time. Lab was not DEC approved lab. DEC requested that GSA submit documentation of lab appproval and use DEC-approved labs in the future, include DEC QA/QC Checklists, and updated CSMs in future reports. Additional GW montioring required to confirm cleanup conditions met. Treatment system requires decomissioning before closure can be considered. Phone call with consultant to discuss these topics so they could develop a workplan for this field season. |
Sharon Richmond |
| 9/15/2010 |
Meeting or Teleconference Held |
Meeting with the consultant and the responsible party to discuss the site. Approved the proposed work plan for an additional round of groundwater monitoring at this site. Discussed options for decommissioning the remediation system and what documentation will be needed for site closure. |
Melody Debenham |
| 4/23/2012 |
Site Characterization Report Approved |
Approved the U.S. General Services Administration, Groundwater Assessment, Fairbanks Federal Building, Former Motor Pool report dated September 9, 2011 (received March 12,2012). Groundwater samples were collected from eight monitoring wells and analyzed for gasoline range organics, benzene, toluene, ethylbenzene, xylenes, and lead. Samples from two of the wells were also analyzed for diesel range organics and polynuclear aromatic hydrocarbons. Lead was detected above the cleanup level in all 8 wells. All other analytes were below their respective cleanup levels. An additional round of groundwater sampling to address the lead results was performed in 2011 and the results are presented in a separate report. |
Melody Debenham |
| 5/22/2012 |
Document, Report, or Work plan Review - other |
Approved the Decommissioning Plan for groundwater monitoring wells and air extraction wells. |
Melody Debenham |
| 5/30/2012 |
Site Visit |
Performed a site visit to observe well decommissioning. The 7 monitoring wells and 11 air injection/vapor extraction wells at this site are being decommissioned. |
Melody Debenham |
| 8/9/2012 |
Document, Report, or Work plan Review - other |
Approved the final report documenting the decommissioning of eighteen groundwater monitoring and vapor extraction wells. |
Melody Debenham |
| 8/9/2012 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77952 gasoline spill. |
Melody Debenham |
| 8/28/2012 |
Cleanup Complete Determination Issued |
|
Melody Debenham |
