Action Date |
Action |
Description |
DEC Staff |
9/30/2013 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff Shannon DeWandel. Spill no. 13239925802; spill date = 9/13/13; substance = petroleum; quantity = unknown; source = USTs #1 and #2 (2A & B). |
Mitzi Read |
10/3/2013 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
10/3/2013 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST site created in CSP database for source area UST #1 10,000-Gal Gas & UST #2 (2A & B) 12,000-Gal (6,000-Gas/6,000-Diesel), 79512.
Contamination found during UST facility inspection at leaking sumps at the top of both tanks. The sumps were repaired and the fuel lines were replaced by the UST contactor. |
Mitzi Read |
10/4/2013 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 79512 name: UST #1 10,000-Gal Gas & UST #2 (2A & B) 12,000-Gal (6,000-Gas/6,000-Diesel) |
Mitzi Read |
11/4/2013 |
Potentially Responsible Party/State Interest Letter |
Notice of Hazardous Substance Liability Potential Responsible Party (PRP) letter sent to the current owner K & SC Corporation (Ms. Myong Kim). |
Bill Janes |
11/26/2013 |
Underground Storage Tank Site Characterization or Assessment |
On September 17, 2013 about 5 cubic yards of contaminated soil was removed at the gasoline tank sump (tank 1) and stockpiled at the site on the north side of the building. One sample was collected from the stockpile had 1,510 mg/kg GRO, 4.53 mg/kg naphthalene, and 3.63 mg/kg benzene. One sample was collected from the excavation had 5,390 mg/kg GRO, and 26.6 mg/kg benzene. The nature and extent of the remaining contamination at this tank has not been defined. |
Robert Weimer |
11/26/2013 |
Update or Other Action |
Also on September 17, 2013 an additional 5 cubic yards of contaminated soil was removed at the diesel/supreme gasoline tank sump (tank 2) and stockpiled at the site on the north side of the building. One sample was collected from the stockpile had 66.7 mg/kg DRO, 9.47 mg/kg GRO, and 0.0656 mg/kg benzene. One sample was collected from the excavation had 7.91 mg/kg GRO, non-detect (<21.8 mg/kg) DRO, non-detect (<54.6 mg/kg) RRO, non-detect (<0.0115 mg/kg) PAHs, and 0.078 mg/kg benzene. The nature and extent of the remaining contamination at this tank has not been defined. |
Robert Weimer |
11/26/2013 |
Document, Report, or Work plan Review - other |
ADEC approves request to transport off property to thermally treat the two 5 cubic yard stockpiles at ASR. |
Robert Weimer |
12/31/2013 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
Administrative action addition for grant reporting purposes. |
Evonne Reese |
3/6/2014 |
Site Characterization Workplan Approved |
On February 19, 2014 a work plan was submitted for conducting a limited phase II environmental site assessment. The work plan proposes sampling 6 borings in the vicinity of a septic drainfield, trench drain, current septic tank, former USTs, and current USTs. Groundwater is not expected to be encountered (estimated to be at over 130 feet below ground surface).
The work plan is approved with the following modifications:
1. Add total lead for all analytical samples.
2. Add VOCs (8260), PAH, and RCRA metals to the drain field and trench drain samples.
Additional sampling will be needed in the future to fully define the nature and extent of the sump contamination discovered on 9/15/2013. Based on the results of the proposed assessment further assessment, monitoring, and/or corrective action may be required.
|
Robert Weimer |
4/28/2014 |
Document, Report, or Work plan Review - other |
On March 2014 four soil samples plus one duplicate were collected from four soil borings (one soil boring SB-4 had no analytical samples collected). Soil boring SB-1 was drilled to 20 feet below ground surface (bgs) near the on-property septic leach field had no detectable petroleum. Soil boring SB-2 was drilled to 39 feet bgs near the current tanks had a petroleum odors from 2.5 to the base of the boring at 39 feet bgs. In SB-2: 5,460 mg/kg GRO, 101 mg/kg DRO, non-detect (<21.3 mg/kg) RRO, 123 mg/kg benzene, and 3.81 mg/kg lead in the analytical soil sample collected at 12.5 bgs. In SB-2: 55.2 mg/kg GRO, non-detect (<21.3 mg/kg) DRO, non-detect (<21.3 mg/kg) RRO, 2.6 mg/kg benzene, and 8.54 mg/kg lead in the analytical soil sample collected at 39 bgs. Soil boring SB-3 was drilled to 15 feet bgs near the former tanks had a petroleum odors from the ground surface to the base of the boring at 15 feet bgs. In SB-3: 1,750 mg/kg GRO, 956 mg/kg DRO, non-detect (<20.8 mg/kg) RRO, 6.39 mg/kg benzene, and 4.61 mg/kg lead in the analytical soil sample collected at 15 bgs. The nature and extent of the remaining contamination at these areas has not been defined. According to the report, Cook Inlet Marketing Group (CIMG) directed their consultant (BGES) not to drill two (south the current USTs and north of the trench drain) of the proposed six soil borings that were specified in the DEC approved work plan.
|
Robert Weimer |
5/29/2014 |
Potentially Responsible Party/State Interest Letter |
Follow up Notice of Hazardous Substance Liability Potential Responsible Party (PRP) letter sent to the current owner K & SC Corporation (Ms. Myong Kim). In the letter ADEC also requests a work plan by August 1, 2014, including a schedule for conducting the work, for conducting a release investigation for these contaminated areas. This would include the sampling of any water wells at or near the property. This would also include the sampling of soil borings to determine the vertical and horizontal extent of the contamination in current and former underground storage tank areas. If contamination is found to extend to near the groundwater then long-term groundwater monitoring wells would need to be installed and sampled. ADEC also requests a corrective action work plan for remediating the contamination at this site be submitted by October 15, 2014, including a schedule for conducting the corrective action work. |
Robert Weimer |
6/20/2014 |
Site Characterization Workplan Approved |
ADEC approves June 20, 2014 release investigation work plan. The plan proposes to sample 9 soil boring to help define the nature and extent of the contamination identified near soil borings SB-2 and SB-3. If groundwater is encountered at least one boring per area will be completed as a monitoring well, a water well search will be conducted in a quarter mile radius, and all water wells within 500 feet will be sampled. Work is scheduled to begin on June 23, 2014. |
Robert Weimer |
7/8/2014 |
Update or Other Action |
Update from the property owners consultant (BGES) that they are having trouble drilling deeper than 112 feet, they would like to use a air rotary rig to drill deeper. We discussed that would be fine for installing a monitoring well, but any soil samples would be considered biased low due to the high pressure air used down the hole in the drilling. |
Robert Weimer |
7/16/2014 |
Update or Other Action |
ADEC has no objection to request to use an special air rotary rig that has a split spoon sampler driven ahead to collect soil samples. They propose to collect volatile samples at 112 feet to compare the results of the auger sampling at that depth with those with an air rotary rig to help evaluate how much the volatile samples are being biased low due to the high pressure air used down the hole in the drilling. They are proposing to using an air rotary rig because of refusal encountered at 112 feet using an auger drill rig. |
Robert Weimer |
7/29/2014 |
Update or Other Action |
Update from consultant that the special air rotary rig that has a split spoon sampler driven ahead to collect soil samples had low field readings at a location 5 feet horizontally away at the 112 feet depth. They plan to use the air rotary to evaluate field readings and analytical results at shallower soils to compare with the recent auger drilling in that area. |
Robert Weimer |
8/1/2014 |
Update or Other Action |
Update from the property owners consultant (BGES) that one monitoring well has been completed and they found elevated field reading in the soils near the groundwater in that well. They propose to install two additional monitoring wells about 40 to 50 feet downgradient from that location to help define the extent of the soil and groundwater contamination in this area. |
Robert Weimer |
8/5/2014 |
Document, Report, or Work plan Review - other |
Between July 29, 2014 and August 5, 2014 five soil borings (soil borings SB5, SB5A, SB5B, SB13, and SB14) were sampled to help define the extent of the soil contamination at this site. Up to 123.0 mg/kg benzene, 5,220 mg/kg GRO, 69.2 mg/kg DRO, and 22.1 mg/kg RRO in the samples collected. |
Robert Weimer |
8/7/2014 |
Update or Other Action |
Update from the property owners consultant (BGES) that the 2nd and 3rd monitoring wells were completed on August 6, 2014. They plan to sample all three monitoring wells by August 8, 2014. The field readings at the soil/water interface in the 2nd and 3rd monitoring wells were lower than at the 1st monitoring well that is located closer to the release location at the current USTs. Groundwater was encountered at 139.5 feet below ground surface in the monitoring wells. The drinking water well survey of the area is scheduled to be conducted soon. |
Robert Weimer |
8/8/2014 |
Update or Other Action |
Update from the property owners consultant (BGES) that high field readings and gasoline odors in the vapors in all three monitoring wells. While not measurable with the oil/water interface probe there appears to be a thin layer of gasoline product in all three monitoring wells, the groundwater samples will be run in the lab to compare concentrations. Additional monitoring wells are needed to define the extent of the groundwater contamination. |
Robert Weimer |
8/12/2014 |
Document, Report, or Work plan Review - other |
August 11-12, 2014 groundwater sampling event. The three site monitoring wells were purged prior to sampling within the top foot of the water column as required. Up to 18.8 ug/l benzene, 0.145 mg/l GRO, non-detect lead, and non-detect PAHs in the groundwater samples collected. Groundwater flow direction was to the west by southwest with a depth to groundwater of 139.46 to 140.03 below ground surface. |
Robert Weimer |
8/21/2014 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 79512 UST #1 10,000-Gal Gas & UST #2 (2A & B) 12,000-Gal (6,000-Supreme Gas/6,000-Diesel). |
Robert Weimer |
9/8/2014 |
Update or Other Action |
Call from nearby property owner who has a drinking water well located about 650 feet from the Peters Creek Chevron property. We discussed that Peters Creek Chevron hopes to have their consultant complete a drinking water well search for at least the first 1/4 mile radius, and sample drinking water wells in the area by September 12, 2014. |
Robert Weimer |
9/8/2014 |
Update or Other Action |
ADEC contacted Peters Creek Chevron's consultant (BGES) to get an update on the status of the required drinking water well search and sampling of drinking water wells in the area. BGES said that they had been informed by Peters Creek Chevron's representative that further work was currently on hold. We discussed that it is critical that a drinking water well search for at least the first 1/4 mile radius, and sample drinking water wells in the area be completed as soon as possible and by September 12, 2014. BGES said they would follow up with the Peters Creek Chevron's representative. Later ADEC was contacted by Peters Creek Chevron's representative that after they contact the insurance company tomorrow morning about funding the site work, they would provide an update to ADEC about conducting a drinking water well search for at least the first 1/4 mile radius, and sample drinking water wells in the area be completed as soon as possible and by September 12, 2014. |
Robert Weimer |
9/10/2014 |
Update or Other Action |
ADEC received an email from KSC's attorney that KSC in not in the financial position to fund additional environmental work (including the drinking water well search and sampling of drinking water wells in the area) at the site until the insurance company begins to pay for the work. KSC's attorney stated that it appears that KSC may need to initiate litigation to get the insurance company to pay. |
Robert Weimer |
9/10/2014 |
Update or Other Action |
ADEC called the nearby property owner who had called on September 8, 2014 regarding her drinking water well located about 650 feet from the Peters Creek Chevron property. I informed her about what KSC’s attorney had said. I recommending to that she have her drinking water well sampled for VOC’s (524.2) and GRO (AK 101) since it did not appear, based on the email, that KSC would be doing it anytime soon. She said that she intended to have her well sampled soon and would submit the results to me once she gets them. She stated that she had heard that the static water level in her water well was about 155 feet below ground surface, which would indicate that it is drawing water from same aquifer that the Peters Creek Chevron property found groundwater contamination at 139.5 feet below ground surface. |
Robert Weimer |
9/16/2014 |
Update or Other Action |
ADEC letter to the RP requesting a drinking water well search and drinking water well sampling. ADEC again requests that a 1/4 mile or greater drinking water well search be completed and submitted to ADEC by no later than September 22, 2014, along with a work plan for the sampling and laboratory analysis of the drinking water wells potentially at risk in the area. The work plan is to include a schedule for conducting the drinking water well sampling by no later than September 29, 2014. The letter also noted that is they are unwilling or unable to conduct the requested work in the timeframe requested, ADEC may hire one of their term contractors to do the work and recover the costs from the RP. |
Robert Weimer |
9/19/2014 |
Update or Other Action |
ADEC received an email from KSC's attorney that KSC in not in the financial position to conduct the requested drinking water well search and sampling. |
Robert Weimer |
10/6/2014 |
Update or Other Action |
ADEC received the results of the drinking water well sampling conducted on September 19, 2014 at the nearby property well located about 650 feet from the Peters Creek Chevron property. The owner of that property hired their own consultant (ArcTerra Consulting) to conduct the sampling since the Peters Creek Chevron property owner was unwilling/unable to conduct the work.
The drinking water well was sampled for VOC’s (524.2) and GRO (AK 101), all were non-detect. The information submitted documented that the static water level was measured on August 28, 2012 was 155 feet below ground surface, which would indicate that it is drawing water from same aquifer that the Peters Creek Chevron property found groundwater contamination at 139.5 feet below ground surface. |
Robert Weimer |
10/7/2014 |
Update or Other Action |
ADEC received an email from KSC's attorney that the insurance company ASIC has authorized the consultant BGES to conduct the requested drinking water well search and sampling. BGES called ADEC and said they would be completing the work soon. |
Robert Weimer |
10/23/2014 |
Update or Other Action |
ADEC received notification from KSC's consultant BGES that they have been authorized to complete the reports for the work previously done, collect water samples from the site monitoring wells, and continue release investigation work. |
Robert Weimer |
11/12/2014 |
Document, Report, or Work plan Review - other |
ADEC review of BGES October 27, 2014 Drinking Water Well Survey report. The report documented the results of a 1/4 mile drinking water well survey. The report identified 77 active water wells with 1/4 mile and recommended water sampling at 10 of them for BTEX by EPA Method 524.2. The report identified that there may be some additional drinking water wells in the area on lots not currently in well databases and they plan to conduct additional field surveys and/or telephone surveys of those lots. Based on the survey results they may recommend additional water wells to be sampled. ADEC has no objection to them conducting the drinking water well sampling recommended in the report. |
Robert Weimer |
11/14/2014 |
Document, Report, or Work plan Review - other |
November 10-12, 2014 groundwater sampling event. The three site monitoring wells were purged prior to sampling within the top foot of the water column as required. All samples were non-detect for benzene and GRO in the groundwater samples collected. Groundwater flow direction was to the west by southwest with a depth to groundwater of 140.72 to 141.32 below ground surface. |
Robert Weimer |
12/17/2014 |
Document, Report, or Work plan Review - other |
December 17, 2014 groundwater sampling event. The new site monitoring well (MW-4) was purged prior to sampling within the top foot of the water column as required. All samples were non-detect for BTEX, GRO, DRO, and RRO in the groundwater sample collected. Depth to groundwater was 140.73 below ground surface. |
Robert Weimer |
1/6/2015 |
Update or Other Action |
Based on existing site sample data and site conditions ADEC concurs with the recommendation of the RP's consultant that sampling in the Glenn Highway ROW is needed in order to define the extent of the contamination at this site. The proposed 8 locations are approved for ADEC Contaminated Sites Program purposes. They expect to begin the work by January 16, 2015.
Based on the results additional sampling may be required to define the nature and extent of the contamination for this site. |
Robert Weimer |
1/6/2015 |
Document, Report, or Work plan Review - other |
In October 2014 three borings were sampled (SB15, SB16, SB17) and SB17 was completed as a monitoring well. Up to 14.3 mg/kg benzene and 379 mg/kg GRO in the soil samples collected. |
Robert Weimer |
1/29/2015 |
Document, Report, or Work plan Review - other |
ADEC approves request not to advance proposed soil boring north of the propane tank. ADEC also approves request for a reduction in the sample frequency for the two borings along the southbound lane of the Glenn Highway. |
Robert Weimer |
2/11/2015 |
Document, Report, or Work plan Review - other |
Between November 26, 2014 and February 11, 2015 eight soil borings (soil borings SB18 - SB25) were sampled to help define the extent of the soil contamination at this site. All samples collected were non-detect BTEX and GRO. |
Robert Weimer |
2/26/2015 |
Update or Other Action |
ADEC requests that the 4 monitoring wells at the Peters Creek Chevron site be sampled for BTEX and GRO by no later than March 31, 2015, and quarterly thereafter. ADEC is also requesting a report of the results of this monitoring event and all previous groundwater monitoring events be submitted by May 15, 2015. ADEC requests that the results of future monitoring events (after the March 2015 event) be submitted within 60 days of when the sampling is conducted. |
Robert Weimer |
3/20/2015 |
Document, Report, or Work plan Review - other |
March 18-20, 2015 groundwater sampling event. The four site monitoring wells were purged prior to sampling within the top foot of the water column as required. All samples were non-detect for BTEX and GRO in the groundwater samples collected. Groundwater flow direction was to the west by southwest with a depth to groundwater of 142.05 to 143.00 below ground surface. |
Robert Weimer |
4/17/2015 |
Document, Report, or Work plan Review - other |
Between December 30, 2014 and February 19, 2015 VOC (EPA Method 524.2) water samples were collected from 5 nearby drinking water wells located at 20727 Oberg Road, 22733 Friendship Lane, 20707 Oberg Road, 20912 Four Wheel Drive, and 20640 Chapel Road. All of the drinking water samples were non-detect. |
Robert Weimer |
6/26/2015 |
Update or Other Action |
ADEC confirmed in discussions with the consultant that active remediation (corrective action) will be required for the remaining contamination at this site. |
Robert Weimer |
9/9/2015 |
Document, Report, or Work plan Review - other |
ADEC approved the August 26, 2015 work plan for conducting an evaluation of vapor intrusion at 20808 Bill Stephens Drive. The work plan proposes to collect one outdoor and three indoor air samples (plus one duplicate) in the fall of 2015 for non-frozen ground conditions. A follow up sampling event during frozen ground conditions will also be required by March 31, 2016. |
Robert Weimer |
10/9/2015 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approves 440 gallons of monitoring well purge/development water for treatment and disposal at NRC Alaska. ADEC approves thermal treatment at ASR of 31.5 tons of contaminated drill cuttings. |
Robert Weimer |
10/30/2015 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approves disposal at Anchorage Regional Landfill of an additional 24 tons of contaminated drill cuttings. |
Robert Weimer |
12/10/2015 |
Document, Report, or Work plan Review - other |
On September 22-23, 2015 a vapor intrusion evaluation was conducted at 20808 Bill Stephens Drive. They collected one outdoor and three indoor air samples (plus one duplicate) to evaluated non-frozen ground conditions. All five samples were below ADEC target levels for indoor air at residential and commercial properties.
A follow up sampling event during frozen ground conditions will also be required by March 31, 2016. |
Robert Weimer |
12/11/2015 |
Document, Report, or Work plan Review - other |
The Alaska Department of Environmental Conservation (ADEC) has reviewed the BGES “Indoor Air Investigation and Feasibility Study” report dated December 2015 (report). This report included a detailed assessment of different remedial alternatives (corrective action) for the contamination identified at this site, and recommended ex-situ thermal remediation combined with soil vapor extraction (SVE) as the selected remedy for this site. ADEC concurs with that recommendation. ADEC requests that you submit by March 1, 2016, for ADEC review and approval, a work plan for conducting a pilot test for the SVE. This pilot test will help collect the necessary site data to design a cost-effective SVE treatment system to remediate your site.
The report discussed the possibly collecting additional site data and establishing site specific method 3 or 4 cleanup levels prior to installing a remediation system at this site. This request is not approved for two reasons: 1. We don’t want to delay the required active remediation (corrective action) of the contamination at this site, and 2. Given the porous soil type, type of contamination (BTEX and GRO), the migration of the contamination to groundwater, the active drinking water wells in the area, and site contamination extending off-property it is not likely that any higher site specific alternative cleanup levels would be approved based on a method 3 or 4 evaluation. The ADEC would like to see the funds available for this site spent on the remediation of the site, instead spending funds on the collection of additional site data required for and preparing a method 3 or 4 evaluation.
|
Robert Weimer |
12/15/2015 |
Document, Report, or Work plan Review - other |
On September 1, 2015 a VOC (EPA Method 524.2) water sample was collected from the nearby drinking water well located at the Municipality of Anchorage's Oberg Ball Field Park located on Dallon Court. The drinking water sample was non-detect. |
Robert Weimer |
2/29/2016 |
Update or Other Action |
Peters Creek Chevron's consultant requested an extension for the submittal by March 1, 2016, for ADEC review and approval, a work plan for conducting a pilot test for the SVE. This pilot test will help collect the necessary site data to design a cost-effective SVE treatment system to remediate the site. They have not been authorized by the insurance company to prepare the requested work plan. An extension to March 31, 2016 is approved. |
Robert Weimer |
3/7/2016 |
Document, Report, or Work plan Review - other |
ADEC approves request to conduct indoor air sampling in accordance with the previously approved work plan. The frozen ground condition sampling is planned to be conducted on March 8-9, 2016. |
Robert Weimer |
4/1/2016 |
Update or Other Action |
On March 31, 2016 Peters Creek Chevron's consultant requested an extension for the submittal for ADEC review and approval of a work plan for conducting a pilot test for the SVE. This pilot test will help collect the necessary site data to design a cost-effective SVE treatment system to remediate the site. An extension to April 30, 2016 is approved. |
Robert Weimer |
4/1/2016 |
Meeting or Teleconference Held |
Discussion with RPs consultant about the results of the recent indoor air sampling conducted during frozen ground conditions. The building is used for commercial on the first floor and residential on the second floor. The air samples were collected on the first floor. The indoor air samples had 3.3 to 3.7 ug/m3 benzene (3.1 ug/m3 residential screening level), and 1.8 ug/m3 chloroform (1.1 ug/m3 residential screening level). The outdoor sample from behind the building had 1.8 ug/m3 benzene. The samples were collected during operation of the gas station which may have influenced the benzene results. They will take another frozen ground sampling next winter. They will discuss the results with the property owner/residents and if there are concerns they may conduct another indoor air sampling event soon. They will also recommend that the weather striping on the doors be improved to reduce the amount of air entering the building from the fueling operations. Future outdoor air sampling to be conducted on the side of the building facing the fueling operations. |
Robert Weimer |
4/29/2016 |
Update or Other Action |
On April 29, 2016 Peters Creek Chevron's consultant requested an extension for the submittal for ADEC review and approval of a work plan for conducting a pilot test for the SVE. This pilot test will help collect the necessary site data to design a cost-effective SVE treatment system to remediate the site. An extension to June 1, 2016 is approved. |
Robert Weimer |
5/31/2016 |
Update or Other Action |
On May 31, 2016 Peters Creek Chevron's consultant requested an extension for the submittal for ADEC review and approval of a work plan for conducting a pilot test for the SVE. This pilot test will help collect the necessary site data to design a cost-effective SVE treatment system to remediate the site. An extension to June 30, 2016 is approved. |
Robert Weimer |
7/7/2016 |
Site Visit |
Site visit to observe groundwater monitoring and to evaluate current site conditions for planned site work. |
Robert Weimer |
7/19/2016 |
Document, Report, or Work plan Review - other |
ADEC approval of the June 2016 work plan for conducting a pilot test for the proposed Soil Vapor Extraction (SVE) treatment system. This pilot test will help collect the necessary site data to design a cost-effective SVE treatment system to remediate the site. |
Robert Weimer |
1/6/2017 |
Update or Other Action |
Update from consultant (BGES) that they will begin the pilot testing of the extraction points on January 10, 2017. |
Robert Weimer |
3/10/2017 |
Meeting or Teleconference Held |
Meeting with owners representative and their consultants to discuss the results of the VES pilot study and future site work. They are to provide the groundwater monitoring report by the end of the month, conduct the indoor air sampling within a month, and submit the work plan for the installation of the VES system by end of April. |
Robert Weimer |
4/4/2017 |
Update or Other Action |
Call from consultant that they are conducting the indoor air sampling today. They did not get enough tight canisters from the lab so it is ok to not do a duplicate air sampler this event. |
Robert Weimer |
5/25/2017 |
Document, Report, or Work plan Review - other |
August 19-20, 2015 groundwater sampling event. The four site monitoring wells were purged prior to sampling within the top foot of the water column as required. Monitoring well MW-1 was the only monitoring well with detectable contamination (3.13 ug/l benzene) this monitoring event. All groundwater samples were non-detect for GRO. The concentrations increased in 1 of the 4 monitoring wells sampled. Groundwater flow direction was to the west by southwest with a depth to groundwater of 144.13 to 145.03 below ground surface. |
Robert Weimer |
5/25/2017 |
Document, Report, or Work plan Review - other |
December 29-31, 2015 groundwater sampling event. The four site monitoring wells were purged prior to sampling within the top foot of the water column as required. All groundwater samples were non-detect for GRO and BTEX. The concentrations increased in 0 of the 4 monitoring wells sampled. Groundwater flow direction was to the west by southwest with a depth to groundwater of 142.35 to 143.20 below ground surface. |
Robert Weimer |
5/26/2017 |
Document, Report, or Work plan Review - other |
March 10-11, 2016 groundwater sampling event. The four site monitoring wells were purged prior to sampling within the top foot of the water column as required. All groundwater samples were non-detect for GRO and BTEX. The concentrations increased in 0 of the 4 monitoring wells sampled. Groundwater flow direction was to the west by southwest with a depth to groundwater of 145.13 to 145.97 below ground surface. |
Robert Weimer |
5/26/2017 |
Document, Report, or Work plan Review - other |
July 6-7, 2016 groundwater sampling event. The four site monitoring wells were purged prior to sampling within the top foot of the water column as required. Monitoring well MW-1 was the only monitoring well with detectable contamination (30 ug/l benzene and 2.13 ug/l toluene) this monitoring event. All groundwater samples were non-detect for GRO. The concentrations increased in 1 of the 4 monitoring wells sampled. Groundwater flow direction was to the west by southwest with a depth to groundwater of 145.88 to 146.83 below ground surface. |
Robert Weimer |
9/8/2017 |
Document, Report, or Work plan Review - other |
March 10, 2016 indoor air sampling conducted during frozen ground conditions. The building is used for commercial on the first floor and residential on the second floor. The air samples were collected on the first floor. The indoor air samples had 3.2 to 3.7 ug/m3 benzene (3.6 ug/m3 residential screening level), and 1.3 ug/m3 chloroform (1.2 ug/m3 residential screening level). The other detected compounds were below residential screening levels. The outdoor sample from behind the building had 1.8 ug/m3 benzene. |
Robert Weimer |
9/8/2017 |
Document, Report, or Work plan Review - other |
May 5, 2016 indoor air sampling conducted during non-frozen ground conditions. The building is used for commercial on the first floor and residential on the second floor. The weather stripping on the outside door was improved since the March 2016 indoor air sampling event. Three air samples were collected on the first floor and two samples were collected from two of the residential apartments on the second floor. The indoor air samples had 0.65 to 2.3 ug/m3 benzene (3.6 ug/m3 residential screening level), and non-detect to 2.2 ug/m3 chloroform (1.2 ug/m3 residential screening level). The other detected compounds were below residential screening levels. The residential apartment samples were below screening levels for all compounds. The outdoor air samples were collected from in front of the building and behind the building on the 2nd floor balcony had up to 2.0 ug/m3 benzene, non-detect chloroform, and 7.5 ug/m3 1,2-Dichloropropane (2.8 ug/m3 residential screening level). The highest concentrations in outdoor air was from the sample collected in front of the building. |
Robert Weimer |
9/22/2017 |
Document, Report, or Work plan Review - other |
April 5, 2017 indoor air sampling conducted during frozen ground conditions. The building is used for commercial on the first floor and residential on the second floor. Three air samples were collected on the first floor and two samples were collected from two of the residential apartments on the second floor. The indoor air samples collected on the first floor had up to 5.3 ug/m3 benzene (16 ug/m3 commercial screening level), 2.8 ug/m3 TCE (8.4 ug/m3 commercial screening level), and 3.0 ug/m3 chloroform (5.3 ug/m3 commercial screening level). The indoor air samples on the second floor had non-detect to 2.0 ug/m3 chloroform (1.2 ug/m3 residential screening level). The other detected compounds were below residential screening levels. The outdoor air samples were collected from in front of the building and behind the building both on the 2nd floor balcony had up to 4.4 ug/m3 benzene, and non-detect chloroform. The highest concentrations in outdoor air was from the sample collected in front of the building, nearest to the fueling operations. |
Robert Weimer |
10/10/2017 |
Document, Report, or Work plan Review - other |
DEC approves October 2017 Revised Soil Vapor Extraction System Installation Work Plan. The work plan is for the installation, operation, and monitoring of the soil vapor extraction (SVE) system, the semi-annual groundwater monitoring, indoor air sampling, and sampling and reuse of soil generated during the SVE installation. |
Robert Weimer |
11/22/2017 |
Update or Other Action |
DEC receives notification that due to frozen ground conditions the installation of the Soil Vapor Extraction System has been delayed until the ground thaws out in 2018. They will continue semi-annual groundwater monitoring and indoor air sampling as per the approved work plan. |
Robert Weimer |
5/23/2018 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request to transport 250-300 cubic yards of contaminated soil to ASR. The soil is to be generated during the installation of the vapor extraction system. |
Robert Weimer |
7/20/2018 |
Update or Other Action |
Based on the information presented DEC has no objection to reuse of the 45 cubic yards of “apparently clean” stockpile soils on 20808 Bill Stephens Drive property a minimum of 100’ away from any drinking water wells. All of the stockpile samples meet Method 2 migration to groundwater cleanup levels, they had up to 23.3 mg/kg DRO, and non-detect for GRO, VOCs, and PAHs. This stockpile was also generated during the installation of the soil vapor extraction remediation system. |
Robert Weimer |
3/15/2019 |
Update or Other Action |
DEC receives notification that the consultant plans to conduct indoor air sampling on March 18-19, 2019. They also plan to conduct groundwater monitoring and operate the SVE system in 2018 and 2019. A report of the results is expected in August 2019. |
Robert Weimer |
3/2/2020 |
Document, Report, or Work plan Review - other |
February 14, 2018 indoor air sampling conducted during frozen ground conditions. The building is used for commercial on the first floor and residential on the second floor. Two outdoor samples, two indoor samples on the second floor, and three indoor samples plus one duplicate sample on the first floor of the building. All samples were below residential target levels. Up to 3.2 ug/m3 benzene in the samples collected. The residential target level is 3.6 ug/m3. |
Robert Weimer |
3/2/2020 |
Document, Report, or Work plan Review - other |
October 16, 2017 groundwater sampling event. Two (MW-2 and MW-3) of the four site monitoring wells were purged prior to sampling within the top foot of the water column as required. Monitoring well MW-1 and MW-4 did not have sufficient water for sampling due to the low water levels. The two monitoring wells sampled were non-detect for GRO, VOCs, and PAHs. Groundwater flow direction was to the northwest with a depth to groundwater of 147.18 to 148.90 below ground surface. Monitoring well MW-1 exceeded cleanup levels with 30.0 ug/l benzene the last time it was sampled in July 2016. |
Robert Weimer |
3/20/2020 |
Document, Report, or Work plan Review - other |
DEC received notification that the SVE system is currently down due to electrical issues. DEC approved request to suspend operations of the SVE system until June 15, 2020 or the end of the coronavirus pandemic, whichever comes first. |
Robert Weimer |
8/17/2020 |
Update or Other Action |
DEC received notification that groundwater sampling is planned for the 4 existing monitoring wells on August 19th and 20th. |
Janice Wiegers |
11/17/2020 |
Update or Other Action |
Reviewed SVE System report and indoor air sampling reports.
Approved consultant request to disable SVE system for the winter. System is not necessary to mitigate vapor intrusion in building and frozen ground limits system efficacy during winter. |
Michael Hooper |
3/15/2022 |
Document, Report, or Work plan Review - other |
Approved report detailing SVE system operations and groundwater monitoring. SVE system seems to have reached diminishing returns. groundwater concentrations were non-detect in last sampling event (Fall 2020).
Recommended an additional round of GWM and decommissioning SVE system. |
Michael Hooper |
5/26/2022 |
Site Characterization Report Approved |
Reviewed GWM Report, all contaminants of concern were below the cleanup levels. |
Michael Hooper |
6/29/2023 |
Cleanup Complete Determination Issued |
ADEC has approved closure with institutional controls pending finalization of the environmental covenant on the property. The SVE system and wells were decommissioned in June 2023. |
Michael Hooper |
6/29/2023 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Michael Hooper |
3/7/2024 |
Institutional Control Update |
Received signed and recorded copy of Environmental Covenant back from recorder's office and sent out final closure letter. |
Michael Hooper |