| Action Date |
Action |
Description |
DEC Staff |
| 4/27/1989 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77981 ADD; Gasoline, BTEX, & TPH. |
Former Staff |
| 4/27/1989 |
Site Added to Database |
|
Former Staff |
| 4/28/1989 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; :LCAU Date changed DB conversion |
Former Staff |
| 5/3/1989 |
Document, Report, or Work plan Review - other |
SI; Water well survey: 1 well within 1/4 mile; 11 wells within 1/2 mile. Not stated which wells are active. |
Former Staff |
| 5/11/1989 |
Document, Report, or Work plan Review - other |
SI; Woodward Clyde confirmed gasoline contamination at site. TPH was highest in composite of in place soil Sample A at 842 mg/kg & BTEX at 40.87 mg/kg. Recommends that remediation method be vapor extraction for contamination by unleaded gasoline. |
Former Staff |
| 5/18/1989 |
Leaking Underground Storage Tank Corrective Action Underway |
REM; Martech proposes to send gasoline contaminated soils to Anchorage Sand & Gravel for processing. DEC approved plan 5/22/89 and requested copies of EPA method 8020 and modified 418.1 analyses before and after processing. On the order of 1,000 cubic yards excavated while removing USTs at the site. |
Former Staff |
| 6/8/1989 |
Document, Report, or Work plan Review - other |
REM; Letter from AS&G stating that 489.20 tons of fuel contaminated soils were processed and blended with AC-5 for use as non spec black base material. Analysis results included with letter. |
Former Staff |
| 6/21/1989 |
Document, Report, or Work plan Review - other |
Waste oil contamination lab results received from Martech. Total petroleum hydrocarbon contamination ranged from 0 to 1,740 mg/kg. Gasoline contamination TPH ranged from non-detect to 683 mg/kg. |
Former Staff |
| 6/22/1989 |
Document, Report, or Work plan Review - other |
SI; Woodward Clyde submitted report that shows groundwater flows northwesterly and contamination does occur. Three soil borings/monitoring wells were sampled on May 18-19, 1989. Analytical data indicates that soil contamination occurs within a localized area. The groundwater is about 40' below the surface. Up to 0.584 mg/kg (0.024 mg/kg cleanup level) Tetrachloroethylene (PCE) was detected in soil boring samples from monitoring wells #2 and #3. Also up to 0.079 mg/kg benzene (0.025 mg/kg cleanup level) at 40 feet bgs in well #2. The groundwater sample collected from well #2 had 128 ug/l benzene (5 ug/l cleanup level), and 10.4 mg/kg TPH (1 mg/l cleanup level). |
Former Staff |
| 6/30/1989 |
Underground Storage Tank Site Characterization or Assessment |
SA1R; Reviewed a phase 1 site assessment report. |
Former Staff |
| 8/11/1989 |
Update or Other Action |
RAPR; Letter to S. Petito: Need additional soil cleanup before groundwater monitoring proposal can be accepted, request that plan for additional soil cleanup work address cleanup of petroleum and chlorinated organic compounds in soils, and disposal of stockpiled waste soil. |
Former Staff |
| 5/24/1990 |
Update or Other Action |
RAPR; Martech proposed to use soil washing (Martech's Soil Washer) to reduce total petroleum hydrocarbon contamination levels below 1,000 mg/kg. Wash water filtered through activated charcoal filter system to bring discharge water within drinking water standards. Plan approved contingent on wash water disposed of in accordance with all applicable federal, state and municipal law, soils transported as covered load, soils to be transported to landfill for final disposal by 7/15/90 with receipt confirming final disposal. |
Former Staff |
| 6/26/1990 |
Document, Report, or Work plan Review - other |
MS; Martech sends in lab results from monitoring wells. In wells 1 & 3, parameters were non-detectable and well 2 had benzene levels at 854 ug/l and toluene at 2,620 ug/l. Remediation test at well 2 using appropriate techniques if after next quarter benzene is still greater than 200 ug/l. |
Former Staff |
| 11/8/1990 |
Update or Other Action |
REM; Martech USA, Inc. sends letter stating that Municipality landfill denied acceptance of stockpiled material. Sampling results show TPH 562 mg/kg, lead 34.3 mg/kg, arsenic 3.2 mg/kg, chromium 19.9 mg/kg. Currently storing material in super sacks until processing through the soil washer can be completed. |
Former Staff |
| 1/9/1991 |
Document, Report, or Work plan Review - other |
Martech sampling results from May 90 and December 90 show that parameters in well 1 & 3 are non-detectable. Well 2 benzene levels decreased from 854 to 311 ug/l. Depth to groundwater was from 37.51 to 38.90 below ground surface. The groundwater flow direction was toward to northwest these two monitoring events. |
Former Staff |
| 3/15/1991 |
Document, Report, or Work plan Review - other |
MS; Martech sent in monitoring well survey & sampling results for March. Benzene was down from 311 to 161 ug/l. Depth to groundwater was from 38.00 to 39.46 below ground surface. The groundwater flow direction was toward to northwest this monitoring event. |
Former Staff |
| 6/10/1991 |
Document, Report, or Work plan Review - other |
Martech sent in results of monitoring well survey & sampling. Well 2 had 157 ug/l benzene in June 1991 down from 311 ug/l in Dec. 1990, but still above cleanup levels. Depth to groundwater was from 38.00 to 38.90 below ground surface. The groundwater flow direction was toward to northeast this monitoring event. Propose to resample in Dec. 91 since benzene & other parameters continue to drop. |
Former Staff |
| 7/31/1991 |
Update or Other Action |
F; Martech sent in a proposed soil treatment plan involving bioremediation. Plan is approved with a stipulation that an interim report be sent no later than 7/30/92 summarizing remediation efforts & effectiveness of the bioremediation project, including analytical data. If efforts do not appear to be successful, an additional plan may be requested at that time. |
Former Staff |
| 10/13/1994 |
Document, Report, or Work plan Review - other |
LCAR; Performed a Corrective Action Report review. Stockpile treated at ASR. |
Former Staff |
| 10/19/1994 |
Update or Other Action |
Request for Semi-Annual BTEX GW Monitoring for monitoring well #2. |
Daniel Rogers |
| 12/19/1994 |
Document, Report, or Work plan Review - other |
Up to 88.6 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 8/9/1995 |
Document, Report, or Work plan Review - other |
Up to 319 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 12/20/1995 |
Document, Report, or Work plan Review - other |
Up to 285 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 6/16/1996 |
Document, Report, or Work plan Review - other |
Up to 19.1 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 1/20/1997 |
Document, Report, or Work plan Review - other |
Up to 32.5 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: ANCHORAGE CHRYSLER CENTER INC. |
Former Staff |
| 1/9/1998 |
Document, Report, or Work plan Review - other |
Up to 20.1 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 6/25/1998 |
Document, Report, or Work plan Review - other |
Up to 5.12 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 4/7/1999 |
Document, Report, or Work plan Review - other |
Up to 7.07 ug/l benzene in groundwater at monitoring well MW-2. |
Robert Weimer |
| 10/13/2004 |
Update or Other Action |
Talked with service manager for RP, he will look for any work done since 1994 and submit the results. |
Robert Weimer |
| 10/19/2004 |
Update or Other Action |
Reviewed files at RP's office, got copies of monitoring reports (1995-1997) that were not in our files. The March 1997 report shows groundwater still contaminated (up to 32.5 ug/l benzene), and recommend further sampling. |
Robert Weimer |
| 11/3/2004 |
Document, Report, or Work plan Review - other |
RP faxed additional groundwater monitoring reports from 1998 and 1999. |
Robert Weimer |
| 11/4/2004 |
Update or Other Action |
Talked with RP, he will contact consultant to take another groundwater sample for BTEX, GRO, DRO. If results are good the consultant is to submit a plan for collecting confirmation soil samples to determine if the in-situ soils have naturally attenuated to default cleanup levels. |
Robert Weimer |
| 11/17/2004 |
Document, Report, or Work plan Review - other |
11/5/04 groundwater sampling. 0.43 mg/l DRO, 0.62 mg/l GRO, and non detect for benzene. Need confirmation soil samples. |
Robert Weimer |
| 10/13/2005 |
Update or Other Action |
Need confirmation soil samples to evaluate site for closure. |
Robert Weimer |
| 4/18/2008 |
Exposure Tracking Model Ranking |
Site ranked on the new Exposure Tracking Model (ETM). The ETM is a new site ranking system that looks at, based on available data, the potential exposure pathways for the contamination remaining at the site. |
Robert Weimer |
| 7/1/2010 |
Update or Other Action |
Discuss site status with owners consultant. He will prepare a work plan for taking confirmation samples. |
Robert Weimer |
| 8/25/2010 |
Site Characterization Workplan Approved |
The August 2010 work plan proposes to drill four soil borings and to collect soil samples at the above referenced site to assess whether any soil contamination remains above site cleanup levels. Based on the information provided the work plan is approved under the following conditions:
1. Section 4.1: Each of the four proposed soil borings are to be drilled to below groundwater (estimated to be 40 feet below ground surface) with field screening readings collected at least every 2.5 feet from the ground surface to groundwater, including a field screening reading at the soil/water interface. For soil borings ANC-SB-1, ANC-SB-2, and ANC-SB-3 confirmation soil samples are to be collected from native soils within 2 feet below the depth of backfill in each soil boring location. A confirmation soil sample will be collected at the soil/water interface in soil boring ANC-SB-4. An additional confirmation soil sample will be collected from each boring at the highest field screening depth if that depth is different than the confirmation samples listed above.
2. Section 5.1: Add VOC analysis to the BTEX, GRO, and DRO laboratory soil sample analytical methods proposed. In addition PAH analysis is to be conducted at the highest 1 field screening location.
3. Section 11: A complete copy of the field notes is to be included with the project report.
4. Figure 2: Move proposed boring ANC-SB-4 to between the former excavation and
monitoring well MW-2.
5. DEC requests to be notified at least 48 hours prior to the soil sampling work being conducted.
|
Robert Weimer |
| 3/4/2013 |
Update or Other Action |
To date have not received results of conditionally approved work plan for taking confirmation soil samples so the site can be evlauated for possible closure. One of the conditions was the DEC be notified at least 48 hours prior to conducting the work. |
Robert Weimer |
| 12/16/2013 |
Update or Other Action |
Called Steve Ercison of Anchorage Chrysler Dodge to check on status of release investigation work at the site. A work plan was conditionally approved on August 25, 2010, but DEC has not received the results since then. Need the results of the work or an update on when the work is going to be conducted. |
Robert Weimer |
| 12/16/2013 |
Update or Other Action |
Call from the RPs current consultant (BGES) they did some site sampling work in 2011 for a property transfer. They will get permission from the RP to submit a copy of that report. |
Robert Weimer |
| 1/9/2014 |
Site Visit |
Site visit to go over confimation sampling locations. The northwest monitoring well was missing its plug to keep surface runoff from entering the monitoring well. They said they would get plug for that monitoring well. The consultant BGES said they expect to conduct the confirmation sampling in about two weeks. |
Robert Weimer |
| 1/22/2014 |
Site Visit |
Site visit to observe confimation soil sampling. They are sampling 4 soil borings to check the current soil concentrations in the former tank excavation and just down gradient of the excavation. Groundwater was encountered around 38 feet below ground surface. The northwest monitoring well (MW-2) had its missing plug replaced to keep surface runoff from entering the monitoring well. The southwest monitoring well (MW-1) was found to be missing a plug and full of dirt. |
Robert Weimer |
| 11/14/2014 |
Document, Report, or Work plan Review - other |
On January 2014 four soil borings were sampled to help assess current soil contaminant concentrations in the location of the former tanks. One sample (SB2-10) collected at 31.8 to 35 feet below ground surface near groundwater had 761 mg/kg DRO. Need replacement monitoring wells and additional soil samples to define the nature and extent of the remaining soil and groundwater contamination. |
Robert Weimer |
| 11/18/2014 |
Update or Other Action |
ADEC letter requests that RP submit, by January 18, 2015, a work plan (including a schedule for conducting the work) for conducting a release investigation in the soil and groundwater for this remaining contamination. ADEC requests that the work plan include the installation and sampling of at least one monitoring well at the source area and soil borings to define the extent of the soil contamination.
|
Robert Weimer |
| 6/11/2015 |
Document, Report, or Work plan Review - other |
ADEC provides comments on the proposed release investigation work plan. |
Robert Weimer |
| 6/15/2015 |
Document, Report, or Work plan Review - other |
ADEC approves revised release investigation work plan. The work plan proposes to install and sample one monitoring well (VOC, GRO, DRO, RRO, and one for PAH), repair the two existing monitoring wells, sample four borings (DRO and one for PAH) to help define the extent of the soil and groundwater at this site. |
Robert Weimer |
| 8/22/2016 |
Document, Report, or Work plan Review - other |
In July 2015 one monitoring well was installed (MW-4) and sampled, two existing monitoring wells were checked (MW2 had no sheen on the water, MW3 could not be accessed by the well cap could not be opened), and sample four other borings were sampled to help define the extent of the soil and groundwater at this site. Up to 1,270 mg/kg DRO, 0.269 mg/kg 1-Methylnaphthalene, 0.371 mg/kg 2-Methylnaphthalene, 0.306 mg/kg Naphthalene, 117 mg/kg 1,2,4-Trimethylbenzene, and 0.206 mg/kg Pyrene in the soil samples collected. Up to 0.637 mg/L GRO, 0.784 mg/L DRO, 13.9 ug/L Naphthalene, non-detect benzene and RRO in the one groundwater sample (plus its duplicate) collected from monitoring well MW-4, which had water at 39.33 feet below ground surface. The groundwater samples were collected using a bladder pump after purging within the top foot of the water column as required. The sample concentrations exceeded proposed groundwater cleanup levels for Naphthalene (1.65 ug/L), and 1,2,4-Trimethylbenzene (14.6 ug/L). The soil samples collected in the center of the former tank excavation and the northwest corner of the excavation at the soil/water interface exceeded DRO cleanup levels. The extent of the soil and groundwater contamination at this site has not been defined. |
Robert Weimer |
| 8/24/2016 |
Update or Other Action |
ADEC letter requesting that the RP submit by September 24, 2016, a work plan (including a schedule for conducting the work) for conducting a release investigation in the soil and groundwater for this remaining contamination. ADEC requests that the work plan include the installation and sampling of additional soil borings and monitoring wells to define the extent of the soil and groundwater contamination. ADEC requests the work plan include the repair of MW1, MW2, and MW3 to prevent surface water from flowing into the monitoring well casings. ADEC further requests that the work plan include the sampling of the four current monitoring wells and any future monitoring wells on a semi-annual basis for DRO and PAHs. |
Robert Weimer |
| 9/21/2016 |
Document, Report, or Work plan Review - other |
ADEC conditionally approves BGES’s September 20, 2016 release investigation work plan for the Anchorage Chrysler Dodge, 2501 East 5th Avenue site. The work plan proposes to repair of MW1, MW2, and MW3 in May/June 2017 to prevent surface water from flowing into the monitoring well casings, the sampling of two soil borings and potential of completing them as monitoring wells in July 2017, and the sampling of the four current monitoring wells and any future monitoring wells on a semi-annual basis for DRO and PAHs starting in August 2017.
The work plan is approved under the following conditions:
1. The two proposed soil boring be sampled and completed as monitoring wells by November 21, 2016.
2. The monitoring well repairs be completed by November 21, 2016.
3. The first semi-annual monitoring event be conducted by November 23, 2016.
4. Submit the sampling report by January 23, 2017.
5. Conduct the second semi-annual monitoring approximately 6 months after the first monitoring event, and submit a report of the results of that sampling event within 60 days of the sampling.
|
Robert Weimer |
| 11/23/2016 |
Update or Other Action |
Request from consultant to not complete the two proposed borings as monitoring wells if based on field observations during the sampling of the soil borings they do not appear to be contaminated. Given that historically the groundwater has flowed to the north and northeast, ADEC has concerns that the extent of the soil and groundwater contamination has not been defined in that direction. ADEC requests that the borings be completed as monitoring wells as proposed in the work plan. |
Robert Weimer |
| 1/17/2017 |
Update or Other Action |
DEC approves request for extension to submit report on February 3, 2017, for the winter 2016 release investigation work. |
Robert Weimer |
| 1/23/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request to transport 1.5 cubic yards of contaminated drill cuttings to ASR for thermal treatment. |
Robert Weimer |
| 1/23/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request to dispose of 3 cubic yards of contaminated drill cuttings at the Anchorage Regional Landfill. |
Robert Weimer |
| 4/25/2017 |
Document, Report, or Work plan Review - other |
October 26, 2016 groundwater monitoring event. Up to 0.767 mg/l DRO, 1.63 ug/l Naphthalene, 1.01 ug/l 1-methylnaphthalene, 0.523 ug/l 2-methylnaphthalene, 0.0638 ug/l fluorene, and non-detect for other PAHs in the four groundwater monitoring wells sampled. Depth to groundwater was 38.53 to 39.55 feet below ground surface. The groundwater samples were collected using a bladder pump after purging within the top foot of the water column as required. The four monitoring wells were repaired and resurveyed. Groundwater flow direction was to the west by northwest. |
Robert Weimer |
| 4/25/2017 |
Document, Report, or Work plan Review - other |
On November 29-30, 2016 two soil borings were sampled and completed as monitoring wells (MW-5 and MW-6). Up to 31.9 mg/kg RRO, 0.00697 mg/kg 2-methylnaphthalene, and non-detect for other PAHs and DRO in the soil samples collected. |
Robert Weimer |
| 4/25/2017 |
Document, Report, or Work plan Review - other |
December 2, 2016 groundwater monitoring event. Only the two new monitoring wells (MW-5 and MW-6) were sampled and were non-detect for DRO and PAHs. Depth to groundwater was 38.78 to 39.77 feet below ground surface. The groundwater samples were collected using a bladder pump after purging within the top foot of the water column as required. Groundwater flow direction was to the northwest. |
Robert Weimer |
| 10/17/2017 |
Document, Report, or Work plan Review - other |
June 7-8, 2017 groundwater monitoring event. All six site monitoring wells were sampled and were non-detect for DRO and had up to 0.168 ug/L 1-Methylnaphthalene and 0.0968 ug/L Naphthalene. Depth to groundwater was 39.19 to 39.70 feet below ground surface. The groundwater samples were collected using a bladder pump after purging within the top foot of the water column as required. Groundwater flow direction was to the northwest. Purge water is currently stored on-site. |
Robert Weimer |
| 9/28/2018 |
Document, Report, or Work plan Review - other |
DEC requests a groundwater monitoring event in the fall of 2018 and another in the spring of 2019 of all of the monitoring wells for VOCs(8260) and DRO. This way there will be at least four seasonal events for each of the monitoring wells. The VOCs are requested due to the fact that only monitoring well MW4 was analyzed for it once in July 2015 and that sample exceeds groundwater cleanup levels (2018) for 1,2,4-Trimethylbenzene (56 ug/l) and 1,3,5-Trimethylbenzene (60 ug/l). |
Robert Weimer |
| 1/9/2019 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77981 1989 UST contamination. |
Robert Weimer |
| 6/3/2019 |
Update or Other Action |
ADEC receives notification that they plan to sample the groundwater on June 5-6, 2019. |
Robert Weimer |
| 7/1/2019 |
Document, Report, or Work plan Review - other |
November 14-15, 2018 groundwater monitoring event. All six site monitoring wells were sampled for DRO and VOCs. The DRO was non-detect, and the detected VOCs were below current cleanup levels. Depth to groundwater was 38.68 to 39.68 feet below ground surface. The groundwater samples were collected using a bladder pump after purging within the top foot of the water column as required. Groundwater flow direction was to the northwest. Purge water is currently stored on-site. |
Robert Weimer |
| 12/10/2019 |
Document, Report, or Work plan Review - other |
June 6, 2019 groundwater monitoring event. All six site monitoring wells were sampled for DRO and VOCs. The DRO was non-detect, and the detected VOCs were below current cleanup levels. Up to 0.619 mg/l DRO, 2.75 ug/l 1,2,4-Trimethylbenzene, 1.53 ug/l n-Butylbenzene, and 1.47 ug/l n-Propylbenzene were detected in the monitoring well. Depth to groundwater was 38.12 to 39.91 feet below ground surface. The groundwater samples were collected using a bladder pump after purging within the top foot of the water column as required. Groundwater flow direction was to the northwest. Purge water is currently stored on-site. |
Robert Weimer |
| 3/6/2020 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77981 1989 UST contamination. |
Robert Weimer |
| 5/7/2020 |
Document, Report, or Work plan Review - other |
Monitoring well decommissioning plan submitted on May 5th. BGES will work with Discovery Drilling to remove MW 1-6. Work plan was approved. |
Janice Wiegers |
| 5/19/2020 |
Update or Other Action |
Notified by the consultant that wells will be decommissioned on May 21st. |
Janice Wiegers |
| 8/11/2020 |
Document, Report, or Work plan Review - other |
BGES submitted a well decommissioning report. Six monitoring wells (MW-1 through MW-6) were decommissioned in May. |
Janice Wiegers |
| 11/20/2020 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77981 1989 UST contamination. |
Jessica Hall |
| 12/3/2020 |
Cleanup Complete Determination Issued |
Soil and groundwater contamination at the site have been cleaned up to concentrations below the approved cleanup levels suitable for residential land use. Soil contamination may remain in the vicinity of the former USTs below 20 ft bgs. This site will receive a “Cleanup Complete” designation on the Contaminated Sites Database. |
Jessica Hall |
| 12/3/2020 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77981 1989 UST contamination. |
Jessica Hall |
