| Action Date |
Action |
Description |
DEC Staff |
| 11/13/1989 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77861. Spill Report received this date. Action entered on 10/21/91. |
Ron Klein |
| 11/13/1989 |
Site Added to Database |
|
Ron Klein |
| 10/19/1991 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
A 1,000-gallon unleaded gasoline, 500-gallon diesel, and a 300-gallon waste oil regulated tanks were removed this date. Gasoline and diesel contamination resulting from the tanks was documented. |
Robert Weimer |
| 11/27/1991 |
Update or Other Action |
Sent a letter to Mr. Brown indicating that the department received a report of a petroleum release from an UST system and confirms the report of the release. The letter also requested site characterization and corrective action. |
Robert Weimer |
| 6/15/1992 |
Update or Other Action |
Excavated dirt in a pile on double reinforced visquene above and below. The RP is looking to dispose of dirt pile with the MOA or dirt burmer and was informed by the ADEC that he requires approval before dirt piles can be moving or disposal. |
Robert Weimer |
| 12/5/1996 |
Update or Other Action |
Spoke with Tom Brown via telephone who said that he will send over a copy of the S&S Engineering report. No sludge was present in the removed tanks which were subsequently disposed of at Alaska Metals Recycling. Stockpile is still on site and it has been turned over twice per year and there was no odor was observed after last turn over. |
Robert Weimer |
| 7/28/1997 |
Underground Storage Tank Site Characterization or Assessment |
Reviewed the S & S Engineering, Inc. UST Closure / Site Assessment report “Lot 5; Tract D; Mindoro Subdivision, 775 E. 100th Avenue, Anchorage, AK” dated 11/27/91 and received by the department on 12/10/96.
A 1,000-gallon unleaded gasoline and 500-gallon diesel regulated underground storage tanks (UST) were removed from the east side of the building on October 19, 1991. Gasoline and diesel contamination resulting from the tanks was documented. Dispensers were a part of the tank system. Soil stains and odor observed in the area of the gasoline and diesel USTs. A 300-gallon waste oil regulated tank was removed from the west side of the building on October 31, 1991. The dimensions of the final combined diesel and gasoline USTs excavation was approximately 7' D x 12' W x 17' L while the final dimensions of the waste oil excavation was 7' D x 5' W x 11' L. The volume of soil excavated from the combined diesel and gasoline USTs (53 cy) less the volume occupied by the USTs (7.4 cy) approximately equals (45 cy) the volume of the stockpile (47 cy).
Analytical laboratory results for samples taken at the gasoline and diesel USTs detected exceedances of the 2010 18 AAC 75.341 Method Two Migration to Groundwater cleanup levels in soil for diesel-range organics (DRO); gasoline-range organics (GRO); and benzene, toluene, ethylbenzene, and total xylenes (collectively referred to as BTEX). These cleanup levels in milligrams per kilogram (mg/kg) are 250, 300, 0.025, 6.5, 6.9, and 63. The maximum contaminant results were DRO to 6,360 mg/kg under the south end of the diesel tank; GRO to 2,360 mg/kg, benzene to 36.2 mg/kg, toluene to 422 mg/kg, ethylbenzene to 106 mg/kg, and total xylenes to 567 mg/kg at the south end of the gasoline tank.
The gasoline and diesel stockpiles were not separated. The maximum stockpile sampling results were DRO to 3,350 mg/kg, GRO to 1,120 mg/kg, benzene to 1.9 mg/kg, toluene to 54.4 mg/kg, ethylbenzene to 13.4 mg/kg, and total xylenes to 225.9 mg/kg. The diesel UST samples were not submitted for GRO and BTEX analysis. There is confusion regarding the fate of the stockpiles as the report indicated that the excavator refused to return the grey soil to the excavated hole but the tenant did so later so that business could continue as usual. CSP notes dated 6/15/92 indicated that the excavation was backfilled with approximately 40 cubic yards of clean gravel in the fall of 1991.
Samples from the waste oil tank excavation and removal were submitted for analysis for halogenated volatile organics (HVO), total petroleum hydrocarbons (TPH), total chromium, lead, arsenic, and cadmium. Four soil samples were taken for the waste oil tank. The total lead results ranged from 2.4 to 3.3 mg/kg; arsenic ranged from 3.7 to 4.2 mg/kg; cadmium ranged from non-detectable (0.012 mg/kg) to non-detectable (0.014 mg/kg); and total chromium ranged from 22 to 26 mg/kg. The maximum detected results that exceeded soil cleanup levels were for DRO (TPH) at 1,020 mg/kg, total chromium at 26 mg/kg, and arsenic at 4.2 mg/kg, all in stockpile samples.
GW was not encountered, not investigated, and estimated to be 10-12’ bgs.
Sent a letter to Mr. Brown requesting that a Release Investigation be performed and a long-term stockpiling plan or a corrective action plan be submitted to the CSP by 10/1/97.
Action appended by Petrik on 7/29/09. |
Robert Weimer |
| 12/14/1998 |
Update or Other Action |
A letter was sent to Mr. Brown informing him that he was eligible for funds from the FY99 Tank Closure Grant Program. |
Teresa Boston |
| 1/7/1999 |
Update or Other Action |
Received a letter from Mr. Brown indicating that RLN Environmental was contracted to conduct additional site assessment work at the site in the spring of 1999 as weather permits. Mr. Nadeau of RLN Environmental is also developing a release investigation, soil storage and corrective action plan for submittal to the department. |
David Allen |
| 1/14/1999 |
Update or Other Action |
The CSP received a"Soil Stockpile, Corrective Action Plan, and Independent-Third-Party Release Investigation" dated 1/8/99 by RLN Environmental. |
Bill Petrik |
| 4/6/1999 |
Release Investigation |
Conditional Approval of "Soil Stockpile, Corrective Action Plan, and Independent-Third-Party Release Investigation" dated 1/8/99 by RLN Environmental. |
Robert Weimer |
| 10/23/2000 |
Update or Other Action |
Requested R.I and C.A.P. results. |
Mike Mooney |
| 12/5/2000 |
Release Investigation |
On April 6, 1999 a RI & CAP was approved. On October 23, 2001 the department requested the RI & CAP results be submitted by Nov 27, 2000. There was no response to that request. On Dec. 5, 2000, the RP agreed to begin work in spring of 2001, with work completed by May 30, 2001. |
Mike Mooney |
| 2/23/2001 |
Release Investigation |
Sent a reminder letter to the RP - that as agreed the RI & CAP work would begin in the spring of 2001 and be completed by May 30 of 2001. |
Mike Mooney |
| 12/21/2001 |
Update or Other Action |
Staff changed from Bush to Sundet. |
Lynne Bush |
| 3/14/2006 |
Update or Other Action |
Staff changed from Sundet to Petrik. |
Bill Petrik |
| 10/12/2006 |
Update or Other Action |
Based on an inquiry of the zipcode with the USPS on-line resoucres for the address of 6880 Round Tree Drive, Anchorage, it was indicated to be a Non-Deliverable address. Mail sent to this address will be returned. Therefore, mail will be attempted to be sent to the business. |
Bill Petrik |
| 10/13/2006 |
Update or Other Action |
Mailed a letter to Mike Pawloski of Northern Powerline Constructors, Inc. (NPC) after review by Pam Post of the AG's Office. NPC purchased certain tangible assets from the TAB Electric business in an "Asset Purchase and Sale Agreement" dated 4/1/06 but not the land and Mr. Pawloski expressed interest in cleaning up the property. They moved a contaminated stockpile to a different location and placed it on a liner and covered it. The letter proposed a cost recovery/financial responsibility scenario to Mr. Pawloski. Requested a revised cleanup workplan if subsequent planned cleanup work is a deviation from the 4/6/99 ADEC-conditionally approved work plan. In addition, requested a CSM and a Laboratory Data Review Checklist, and reiterated the program's cost recovery policy. |
Bill Petrik |
| 6/12/2007 |
Update or Other Action |
Received a letter from Northern Powerline Constructors, Inc. (NPC) this date dated 6/11/07 in response to the CSP letter dated 10/13/06. The intent of the letter is to inform the CSP that NPC is not amenable with and disclaims any liability for cost recovery because: 1. NPC does not own the Property; 2. NPC did not assume any liabilities (environmental or otherwise) of Seller when it purchased certain tangible assets of Seller; and 3. NPC has not caused any environmental contamination on the Property. NPC has a Lease Agreement between Mindoro Partners dated 3/31/06. The letter also indicated that Mr. Pawloski has no authority to represent NPC in these matters. |
Bill Petrik |
| 3/5/2008 |
Exposure Tracking Model Ranking |
Initial ranking. |
Bill Petrik |
| 3/10/2009 |
Update or Other Action |
This site was dicussed as a potential LUST site eligible for stimuli funds with Greg Light and Linda Nuecterlein. It was concluded that this site would not rank as eligible for the stimuli funds unless a much more detailed review of the file occurred or even having to contact (or try to) the current operator or Mr. Brown himself. |
Bill Janes |
| 8/20/2009 |
Update or Other Action |
BGES viewed an UST on 8/19/09 at the site located beneath the northeast corner of the structure (end of the garage). The outside edge of the UST was flush with the outside of the structure and the rest of the UST beneath a building addition. BGES dug down to expose the base of the tank and then dug as far as possible horizontally underneath the tank with a hand auger. A soil sample was collected from about 21" beyond the outside edge of the tank and about 9 inches beneath the bottom level of the tank. The sample was submitted for laboratory analysis for RRO, DRO, GRO, BTEX, HVOs, PAHs, PCBs, and metals. The tank is 38" in diameter. The UST appears to be full of sand and closed in place. There is no record of this UST in the UST DB. |
Bill Petrik |
| 9/16/2009 |
Update or Other Action |
Talked with Mr. Tom Brown this morning. Discussed site issues and informed him that the CSP would be sending him a Potentially Responsible Party letter in the mail to forward to John Claus. |
Bill Petrik |
| 10/14/2009 |
Potentially Responsible Party/State Interest Letter |
The Contaminated Sites Program (CSP) completed and mailed via certified mail, return receipt requested, a Potentially Responsible Party letter with enclosed Cleanup Process fact sheet to Mr. Tom Brown, one of the members of the Mindoro Partners, who is the responsible party for the TAB Electric site in Anchorage. Talked with Mr. Tom Brown again this morning reiterating to him that the CSP would be sending him a Potentially Responsible Party letter in the mail and to please share it with the Mindoro Partners. Chatted about site issues and status as well. |
Bill Petrik |
| 11/12/2009 |
Site Characterization Workplan Approved |
Reviewed a copy of the BGES, Inc. "2009 Site Assessment Work Plan", undated, received 11/9/09 and sent a conditional approval letter. The work plan called for soil excavation and characterization at the former locations of a 500-gallon diesel, a 1,000-gallon unleaded, and a 300-gallon waste oil USTs followed with a results summary report to follow. The CSP sent a letter this date approving the work plan with the conditions that: 1) The CSP assumes that the excavations are related to the former locations of the 500-gallon diesel, 1,000-gallon unleaded, and the 300-gallon waste oil USTs; 2) Regarding the RP and an excavator’s involvement in cleanup activities, any activity that the RP or the excavator participates in cannot be undertaken without the presence and direct supervision of a qualified, disinterested, third party. The RP and the excavator’s activities in the work related to this work plan are only conducted with a qualified person from BGES present at all times. Any remedial work conducted without the presence of a third party qualified personnel is in violation of 18 AAC 78.090(e); 3) Headspace field screening will follow protocol outlined in Section 4.4.2 of the UST Procedures Manual; 4) Collection and submittal for laboratory analysis of a sufficient number of characterization samples from the pit bottom and sidewalls prior to backfilling any test pit; 5) Sufficient characterization sampling must occur of any soil backfilled into a test pit prior its consideration for disposal; 6) If groundwater is encountered in a test pit, at least one soil sample is taken just above the saturated zone in that test pit; 7) one sample each is taken from the gasoline and the diesel excavations and submitted for laboratory analysis for the polycyclic aromatic hydrocarbon (PAH) naphthalene by either EPA Method 8021B or EPA Method 8260C (per Table 1 of the UST Procedures Manual); 8) Ensure that the duplicate soil sample submitted to the laboratory is taken from the area where the highest PID screening reading was recorded; 9) Duplicate samples will need to be analyzed for each laboratory analysis method performed, e.g., AK101, AK102, EPA Method 8260C, etc.; 10) Duplicate samples are also to be submitted blind to the laboratory; and 11) A CSM be submitted regardless of the outcome of the proposed tasks completed. Historically, contamination above the 18 AAC 75.341 Method Two cleanup levels was previously documented to exist at the site.
|
Bill Petrik |
| 11/12/2009 |
Document, Report, or Work plan Review - other |
Reviewed a copy of the BGES, Inc. "2009 Site Assessment Work Plan", undated. During site investigative activities in August 2009, an estimated 300- to 500-gallon regulated UST located under a building addition to the NW corner of the main building was discovered. The UST was not removed as its removal would require demolition of the structure that overlies it. Subsequent in situ characterization of the UST included submitting two samples for laboratory analysis for DRO, GRO, RRO, VOCs, PCBs, and metals. All detected contaminants were below their respective cleanup levels except for total chromium which was detected at 30 mg/kg while the cleanup level is 25 mg/kg. The practical quantitation limits (PQL) for arsenic and selenium of 27.8 mg/kg exceeded their respective cleanup levels of 3.9 mg/kg and 3.4 mg/kg. |
Bill Petrik |
| 1/20/2010 |
Update or Other Action |
Received a copy of the BGES, Inc. "2010 Site Remediation Workplan, 775 East 100th Avenue, Anchorage, Alaska" dated 1/20/10. |
Bill Petrik |
| 1/22/2010 |
Update or Other Action |
After talking with Sean Peterson of the RP Consultant BGES, Inc. yesterday, received an updated copy of the BGES, Inc. "2010 Site Remediation Workplan, 775 East 100th Avenue, Anchorage, Alaska" which is now dated 1/21/10. |
Bill Petrik |
| 2/5/2010 |
Site Characterization Report Approved |
The CSP completed review of the BGES "2010 Site Remediation Workplan" dated 2/4/10. The work plan also included a summary of site work performed in 2009.
A fourth UST was discovered under a building addition during site reconnaissance performed in August 2009 by BGES and determined to be regulated. The length of this UST was indeterminate but based on its 3.8’ diameter is either of 300- or 500-gallon capacity. The UST appears to be filled, as determined by knocking on it, but the actual content was not confirmed. A soil sample collected under the UST ~9” below the centerline of the UST and ~21” easterly in from the western outside edge of the tank was submitted for laboratory analysis for DRO, GRO, RRO, VOCs, PCBs, PAHs, and metals. All detected contaminants were below their current migration to groundwater (MGW) respective cleanup levels except for total chromium which was detected at 30 mg/kg while the cleanup level is 25 mg/kg. The PQL for arsenic and selenium of 27.8 mg/kg exceeded their respective cleanup levels of 3.9 mg/kg and 3.4 mg/kg. Despite the exceedances for chromium above its MGW cleanup level as well as the PQL for arsenic and selenium being above their cleanup levels, the CSP considers these levels acceptable because they are within background geologic levels for the Anchorage Area.
Records for UST 4 are lacking in the ADEC UST Database but the UST is estimated to have gone into service around 1989. The structure over it was thought to be built in 1989. The UST was not removed as its removal would require demolition of the structure that overlies it.
Site characterization in November 2009 via digging a test pit indicated that GRO, DRO, ethylbenzene, and total xylenes exceeded their respective MGW cleanup levels at the Former Gasoline UST. The lab results in mg/kg were 518, 1,390, 15.7, and 124, respectively. Benzene was also considered exceeding its MGW cleanup level because the MRL/MDL was 0.193 mg/kg which was above the benzene MGW cleanup level of 0.025 mg/kg.
Samples from the test pit dug at the Former Diesel UST location were sent for laboratory analysis of GRO, DRO, RRO, and BTEX. Analytical results indicated the MGW cleanup levels for DRO and benzene were exceeded at 3,250 mg/kg and at 0.298 mg/kg.
Two soil samples were collected and submitted for laboratory analysis of GRO, DRO, RRO, and BTEX, VOCs, PAHs, and metals during advancement of a test pit in the vicinity of the former waste oil UST. No evidence of contamination was identified. Arsenic was the only analyte detected above its MGW cleanup levels. The arsenic result was 5.58 mg/kg and its cleanup level is 3.9 mg/kg. Despite this exceedance, the CSP considers this arsenic level to be within the background geologic level for the Anchorage Area.
BGES estimated the size of the stockpile in the NE corner of the site at approximately 47 cy. Two stockpile soil samples were collected from a depth of two feet into the pile and submitted for laboratory analysis of GRO, DRO, RRO, BTEX, VOCs, PAH, and metals. Arsenic and total chromium were the only two analytes detected above their cleanup levels. The arsenic result was 5.56 mg/kg, above its cleanup level of 3.9 mg/kg, and the total chromium result was 25.4 mg/kg, above its cleanup level of 25 mg/kg. Despite these exceedances, the CSP considers the arsenic and chromium levels to be within background geologic levels for the Anchorage Area.
After digging these two test pits and sampling was completed, a liner was placed in the excavation to act as an indicator of the extent of this episode of excavation, and the impacted material removed was used as backfill.
Petroleum hydrocarbon contamination above migration to groundwater levels for DRO, GRO, and BTEX, above the Ingestion/Dermal Contact cleanup level for GRO, and Outdoor Inhalation cleanup level for total xylenes remains at the site. |
Bill Petrik |
| 2/5/2010 |
Site Characterization Workplan Approved |
The CSP completed review of the BGES "2010 Site Remediation Workplan" dated 2/4/10. The work plan also included a summary of site work performed in 2009. The work plan proposed further excavation, characterization, and removal of contaminated soils related to the former gasoline and diesel USTs. The CSP sent a letter conditionally approving the work plan. This letter also approved of offsite transport of excavated contaminated soils to Alaska Soil Recycling for disposal and thermal remediation as well as use of an existing stockpile onsite for use as fill based on its characterization last year. Further information regarding the fourth UST was requested. |
Bill Petrik |
| 2/8/2011 |
Document, Report, or Work plan Review - other |
Reviewed a copy of the BGES, Inc. "Additional Site Assessment Activities, 775 East 100th Avenue, Anchorage, Alaska" dated 2/4/11 and received 2/7/11. |
Bill Petrik |
| 2/10/2011 |
Document, Report, or Work plan Review - other |
Reviewed a copy of the BGES, Inc, "Revised Work Plan for Additional Site Assessment Activities, 775 East 100th Avenue, Anchorage, Alaska" dated and received 2/9/11 . |
Bill Petrik |
| 2/18/2011 |
Document, Report, or Work plan Review - other |
Finished review of a copy of the BGES, Inc, "Work Plan (Revision No. 3) for Additional Site Assessment Activities, 775 East 100th Avenue, Anchorage, Alaska" dated and received 2/18/11. |
Bill Petrik |
| 2/23/2011 |
Update or Other Action |
Reviewed an ADEC Building Inventory and Indoor Air Sampling Questionnaire that was originally completed on 2/7/11 and verified by Sean Peterson of BGES, Inc. on 2/15/11. |
Bill Petrik |
| 2/28/2011 |
Site Characterization Workplan Approved |
Sent a letter this date conditionally approving the BGES, Inc. "Work Plan (Revision No. 3) for Additional Site Assessment Activities, 775 East 100th Avenue, Anchorage, Alaska" dated 2/18/11. The conditions were that the Contaminated Sites Program (CSP) is given notice of the soil/gas sampling at least 24-hours prior to the event and a CSP staff must be present to observe the sampling.
The work plan was requested to be changed via email after the letter was mailed. The changes consisted of not completing the advancement of three soil borings inside the building and the related collection and lab analysis of soil samples described in Tasks 5 and 9.
All other tasks will be completed as described in the approved work plan and as required by the approved work plan, including notifying the CSP 24 hours prior to the soil/gas sampling and a CSP representative will be present during the soil/gas sampling so they can observe the soil gas sampling activities. |
Bill Petrik |
| 3/23/2011 |
Document, Report, or Work plan Review - other |
Reviewed the TestAmerica Laboratories, Inc. Analytical Reports the site for Group AUA0008 and AUB001 received 3/23/11 and 3/22/11, respectively, for samples collected 1/13/11 and 2/15/11, respectively. Based on review of these data, the soils from the “Anchorage Regional Landfill Stockpile” and "Potential Clean Soils Stockpile" may be used as backfill at the site as all lab results for GRO, DRO, RRO, BTEX, and PAH results were below the migration to GW cleanup levels. |
Bill Petrik |
| 3/30/2011 |
Update or Other Action |
Received an email from Brad Quade of Alaska Soil Recycling (ASR) indicating receipt of 175.04 tons of petroleum impacted soil from the site. Signed and dated the Soil Disposal Form and emailed it to ASR. |
Bill Petrik |
| 4/1/2011 |
Site Visit |
Observed a subslab soil/gas vapor sampling performed by BGES, Inc. staff. Completed an ADEC Field Inspection Checklist for Air and Vapor Samples during the visit. Spoke with one of the Mindoro Partners who was present to observe the sampling about site status and issues. |
Bill Petrik |
| 4/22/2011 |
Meeting or Teleconference Held |
Spoke with Bob Braunstein of BGES, Inc. regarding the results of the latest site characterization. He verbally relayed results from GW and subslab soil gas sampling. GW results exceeding cleanup levels were 1.87 mg/l DRO and 0.00879 mg/l benzene. VOCs were not sampled for. Soil gas results exceeding cleanup levels were 700 ug/cu. meter PCE at the easternmost sampling point and 1,000 ug/cu. meter at the southermost sampling point. A meeting Between BGES and the RPs is scheduled for 4/25/11 to discuss the next course of action. |
Bill Petrik |
| 7/12/2011 |
Document, Report, or Work plan Review - other |
Reviewed and approved of BGES "Work Plan for Additional Ambient Air, Soil Gas, adn Groundwater Assessment Activities, 775 East 100th Avenue, Anchorage, Alaska." This work plan was recieved at our office on June 17, 2011. BGES proposed to advance multiple screen point borings and complete them as temporary monitoring wells near the former LUST footprint to evaluate the depth and nature of groundwater. If the depth interval of one of the wells to be screened is shallower than the screened interval in MW1, then a second monitoring well will be
advanced and installed adjacent to the existing Monitoring Well MW1 as described in Task 5 below. Two additional borings will also be advanced; one near the floor drain and the other boring advanced to the southwest of the building. Both boring will be completed as monitoring wells and sampled for contaminants of concern (DRO, GRO, RRO, and VOCs). BGES also proposed to conduct a vapor intrusion evaluation by collecting indoor air, and sub-slab gas samples during the same time period. Samples would be analyzed by TO-15 method. |
Todd Blessing |
| 8/23/2011 |
Update or Other Action |
Staff was notified that a small area of surface stained soils was discovered in the vicinity of a 55-gallon trash drum located near the back door of the on-site building. During BGES' investigation into the source of the surface stained soils, a 5-gallon bucket of lube oil was discovered. It was determined that the 5-gallon bucket of lube oil had been slowly leaking its contents inside the drum and subsequently leaked from the drum onto the surrounding soils. BGES sampled the suspect soils for DRO, RRO, GRO, PAHs, VOCs,and RCRA metals. In these samples, DRO and RRO were found to exceed 18 AAC 75.341 Table B2 migration to groundwater cleanup criteria. BGES subsequently excavated approximately 1.8 cubic yards (2.7 tons) of impacted soil and staff approved of BGES' request to transport this impacted soil to ASR for thermal treatment. |
Todd Blessing |
| 10/5/2011 |
Document, Report, or Work plan Review - other |
Staff reviewed BGES Inc.’s “775 East 100th Avenue Anchorage, Alaska 2009-2011 Site Remediation Report, dated September 2011. The subject report documents remedial and site investigation activities conducted at 775 East 100th Avenue Anchorage, Alaska the past three years. Specifically BGES reported on the following:
• Initial site characterization activities of Gasoline, Used Oil, and Diesel Underground Storage Tanks (USTs);
• Excavation of contaminated soil and USTs;
• Investigation of groundwater impacts from UST spills; and
• Evaluation of the potential for vapor intrusion into the on-site building
Staff issued a letter commenting on the report. We noted that the extent of groundwater contamination has not been defined. Consequently, we requested that Mindoro Partners facilitate the installation of at least three additional monitoring wells to determine the extent of the groundwater contamination and the local groundwater flow direction. |
Todd Blessing |
| 10/12/2011 |
Meeting or Teleconference Held |
Staff discussed the site status with Tom Brown, Jim Vander Sanden, and Scott Mariner. Staff informed all affiliates that additional investigation of the nature and extent of groundwater contamination is neccessary prior to DEC issuing a cleanup complete determination. Groundwater flow direction, and the extent of the groundwater plume would need to be defined. Affiliates decided to sample groundwater one additional time with the hope that this event would document that the groundwater is clean supporting their request for a cleanup complete determination. |
Todd Blessing |
| 10/31/2011 |
Meeting or Teleconference Held |
Staff met with Tom Brown, Jim Vander Sanden, and Scott Mariner to discuss the recent sampling and analysis of groundwater from MW-2. Staff informed the affiliates that after a review of the groundwater data, staff will consult internally to make a determination of the possibility of a closure determination with ICs. |
Todd Blessing |
| 11/1/2011 |
Update or Other Action |
Staff reviewed the MW-2 groundwater monitoring data that was collected on October 17, 2011. In these samples, DRO was detected at a level of 0.630 mg/L and benzene was detected at a level of 0.00744 mg/L. No other contaminants of concern exceeded groundwater cleanup criteria. |
Todd Blessing |
| 11/18/2011 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 77861 name: USTs - 1 Unleaded Gas, 1 Diesel, 1 Waste Oil, and One Undetermined |
Todd Blessing |
| 12/7/2011 |
Cleanup Complete Determination Issued |
The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with 775 East 100th Avenue. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required. |
Todd Blessing |
| 12/7/2011 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Todd Blessing |
| 2/22/2012 |
Update or Other Action |
DEC staff recieved the signed Record of Decision that was issued on December 7, 2011. |
Todd Blessing |
| 11/20/2012 |
Update or Other Action |
Staff reviewed BGES, Inc.'s 775 East 100th Avenue Anchorage, Alaska 2012 Groundwater Monitoring Report, dated October 1012. Groundwater samples were collected from MW-2 and analyzed for GRO, DRO, and BTEX. Benzene was the only contaminant of concern detected but at levels below 18 AAC 75.341 Table B2 values. Benzene was detected at a level of 0.002 mg/L. |
Todd Blessing |
| 11/28/2012 |
Institutional Control Update |
DEC staff contacted Mindoro partners and informed them that groundwater monitoring is no longer required. The two remaining monitoring wells will need to be decommissioned according to DEC guidance. |
Todd Blessing |
| 12/6/2012 |
Update or Other Action |
DEC staff received a report documenting the decommissioning of the two on-site groundwater monitoring wells. |
Todd Blessing |
| 7/27/2016 |
Update or Other Action |
Staff name changed from Blessing to IC Unit. |
Evonne Reese |
| 7/28/2016 |
Institutional Control Compliance Review |
IC compliance review conducted. At the end of 2016 this site will be due for its five year follow-up regarding land use conditions. Reminder system has been set to issue a reminder letter at that time. |
Kristin Thompson |
| 1/17/2017 |
Institutional Control Update |
An institutional controls verification letter was issued to the new landowner with a request to sign the ICs Agreement Page as their acknowledgement of the conditions in effect for this property. |
Kristin Thompson |
| 1/26/2017 |
Update or Other Action |
ADEC was informed that this property is on the market now and may sell in the next 90-120 days. We are still waiting to receive the signed ICs Agreement Page from the current owner. |
Kristin Thompson |
| 4/19/2017 |
Institutional Control Update |
Verified on this date with the MOA Assessor's Office that the this property is still owned by the landowner we currently have on record. The IC Agreement document has not been signed and returned by the current property owner. |
Evonne Reese |
| 5/19/2017 |
Institutional Control Update |
Received the signed ICs Agreement page from the landowner this date. The ownership of the property is in the process of being transferred. The current property owner said that he would email us the new property owner's contact information. |
Kristin Thompson |
| 3/12/2018 |
Institutional Control Update |
Verified with MOA that this property sold to a new owner in June of 2017. Scheduled to send a letter to the new landowner which includes the IC Agreement for them to sign. |
Evonne Reese |
| 5/16/2018 |
Institutional Control Compliance Review |
IC compliance review conducted. An institutional controls verification letter was issued to the new landowner (as of June 2017) with a request to sign the ICs Agreement Page as their acknowledgement of the conditions in effect for this property. Reminder system set to check back in one month from now. |
Kristin Thompson |
| 5/30/2018 |
Institutional Control Periodic Reporting |
We received the signed ICs agreement page from the new landowner this date. The landowner reports there have been no changes to the property since the transfer of ownership in 2017. |
Kristin Thompson |
| 1/23/2023 |
Institutional Control Compliance Review |
IC compliance review completed and a reminder letter was issued to the current landowner. The next compliance review will be due in early 2028. |
Evonne Reese |
