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Site Report: Chevron - #4115

Site Name: Chevron - #4115
Address: 11460 Old Seward Hwy.; , Anchorage, AK 99515
File Number: 2100.26.012
Hazard ID: 24094
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 61.116969
Longitude: -149.864540
Horizontal Datum:NAD83

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Problems/Comments

A Chevron branded gas station operated from 1963 until January 2008 when the service station building demolished and its associated underground storage tank system was removed. In 1991 a drain line failed and during excavation to repair the drain line petroleum contamination was discovered. Later in 1991 eight soil borings were sampled and completed as monitoring wells to help define the nature and extent of the soil and groundwater contamination at this site. In 1992 when six more monitoring wells were installed fuel product was found on the groundwater in the monitoring well near the dispenser islands. Also in 1992 500 cubic yards of contaminated soil was excavated from a former dry well located south of the service station building. This excavated soil was subsequently thermally treated. In 1995 one off-property monitoring well was installed (MW-15). In 1998 additional contamination was discovered during a facility upgrade of one used oil tank, one heating oil tank, three gasoline tanks and their associated piping and dispensers. In 1999 a dry well near the north center property line was removed and 120 cubic yards of contaminated soil was excavated and thermally treated. Also in 1999 a remediation system consisting of four dual soil vapor extraction/air sparge wells (SVE/AS-1, SVE/AS-2, SVE/AS-3 and SVE/AS-4) was installed and began operation. In 2003 seven monitoring wells (MW-2, MW-3, MW-4, MW-5, MW-8, MW-13, and MW-14) were decommissioned and two replacement monitoring wells (MW-10R and MW-15R) were installed. In 2008 the remaining three gasoline tanks, one hydraulic oil tank, one unknown tank and their associated piping and dispensers and one floor drain log crib were removed. Also in 2008 six of the monitoring wells (MW-1, MW-6, MW-7, MW-9, MW-10R, and MW-11) and the vapor extraction air sparge system and wells were decommissioned. In 2009 four soil borings were sampled and surface stained soil was excavated and treated off property. In 2010 three soil boring were sampled and two of them were completed as monitoring wells (MW-15RR and MW-17). In 2015 monitoring wells MW-18 and MW-19 were installed on the Lustman property near its southern property boundary with the gas station property. The Lustman property is located just north and down gradient of the former Chevron station property. In 2018 the eight remaining monitoring wells (MW-1R, MW-4R, MW-11R, MW-15RR, MW-16, MW-17, MW-18, and MW-19) were decommissioned in accordance with the DEC approved work plan. Five of the monitoring well were located on the property of the former Chevron gas station. The other three monitoring wells were located on nearby properties. Groundwater was monitored at this site from 1991 to 2017. Historically the depth to groundwater ranged between 31.40 to 45.48 feet below ground surface in those monitoring wells. The nearby drinking water wells were also sampled periodically and showed no detectable contamination above drinking water cleanup levels.

Action Information

Action Date Action Description DEC Staff
2/28/1991 Underground Storage Tank Site Characterization or Assessment Chevron sampling report results received by DEC. Petroleum hydrocarbons were detected in all 3 samples collected from an area of visually dark stained & wet "leach field" 13,000 to 93,000 mg/kg. Former Staff
3/15/1991 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 78086 BTEX, GRO, DRO, RRO and 1-4 dichlorobenzene identified. Former Staff
3/15/1991 Site Added to Database Former Staff
9/15/1991 Document, Report, or Work plan Review - other Eight monitoring wells were installed (MW1 to MW8). Up to 440 mg/kg GRO found in the soils. Robert Weimer
4/3/1992 Document, Report, or Work plan Review - other Site Assessment Report documents soil contamination (MW-7, 31 mg/kg BTEX and 440 mg/kg GRO), and groundwater contamination over cleanup levels in all 8 monitoring wells (max was MW-8 at 20 mg/kg benzene). Over 11 drinking water wells identified within 500 feet of the site. Former Staff
4/8/1992 Leaking Underground Storage Tank Cleanup Initiated - Petroleum Note that this site is also an EPA site because of an injection well on-site (old crib for floor drain wastes). EPA contact is John Williams, Region 10 Seattle, ph # (206) 553-1369. Former Staff
4/10/1992 Update or Other Action Based on site assessment data, DEC requested that Chevron address the soil and groundwater contamination, and sample the closest 2 downgradient drinking water wells. Former Staff
6/11/1992 Document, Report, or Work plan Review - other Six monitoring wells were installed (MW9 to MW14). All wells were sampled. Product in MW-1. Up to 17 mg/l benzene and 200 mg/l GRO in the groundwater. The drinking water wells that were sampled were all non-detect. Depth to groundwater ranged from 40 to 43 feet below ground surface. Robert Weimer
8/15/1992 Document, Report, or Work plan Review - other Dry well excavation south of the building. All of the petroleum contamination was successfully removed and transported for thermal treatment. The excavation was 12 to 18 feet below ground surface. Robert Weimer
9/2/1992 Offsite Soil or Groundwater Disposal Approved 500 cubic yards of contaminated soil was thermally treated at ASR. Robert Weimer
3/13/1995 Leaking Underground Storage Tank Corrective Action Underway Corrective action plan review and approval for the installation of a soil vapor extraction system. 0.3 feet of product in monitoring well MW-1. Former Staff
11/13/1995 Release Investigation New monitoring well (MW-15) installed to help define the extent of the groundwater contamination for this site. Former Staff
11/20/1997 Update or Other Action DEC sends Notification of Intent to Cost Recover Letter to Current Owner: CHEVRON PRODUCTS COMPANY, INC/PERMITS DESK Former Staff
4/24/1998 Underground Storage Tank Site Characterization or Assessment A 1000 gallon used oil tank was removed and the gasoline piping and dispensers were replaced. Dispenser D-1 had 1.5 mg/kg benzene at 4 feet below ground surface. Robert Weimer
4/30/1999 Document, Report, or Work plan Review - other Four nearby drinking water wells (Wilson/Lustman, Barbershop, Skadsem, and Baker) were sampled. The four drinking water wells were sampled and were non-detect for VOCs. A 5th well (AS&G) was not accessible for sampling. Robert Weimer
6/15/1999 Offsite Soil or Groundwater Disposal Approved A dry well located near the north center property line was removed. 120 cubic yards of contaminated soil was removed and transported to ASR for thermal treatment. Excavation was to an 8 foot depth. All final excavation samples meet site cleanup levels. Robert Weimer
10/16/1999 Document, Report, or Work plan Review - other Three nearby drinking water wells (Wilson/Lustman, Skadsem, and Baker) were sampled. The three drinking water wells were sampled and were non-detect for VOCs. The other two drinking water wells (AS&G and Lustman) were not accessible for sampling. Robert Weimer
5/16/2000 Document, Report, or Work plan Review - other Four nearby drinking water wells (Wilson/Lustman, Barbershop, Skadsem, and Baker) were sampled. The four drinking water wells were sampled and were non-detect for VOCs. A 5th well (AS&G) was not accessible for sampling. Robert Weimer
9/26/2000 Document, Report, or Work plan Review - other Four nearby drinking water wells (Wilson, Lustman, Skadsem and Baker) were sampled. The four drinking water wells were sampled and were non-detect for VOCs. A 5th well (AS&G) was not accessible for sampling. Robert Weimer
1/30/2001 Meeting or Teleconference Held Annual meeting with Chevron representatives to review Alaska Chevron contaminated sites and set goals for 2001. Linda Nuechterlein
10/1/2002 Update or Other Action RP's consultant reported that the AS&G drinking water well at 11420 South Gambell Street has been abandoned. Robert Weimer
6/19/2003 Offsite Soil or Groundwater Disposal Approved Approved contaminated soils to ASR for thermal treatment. Robert Weimer
12/18/2003 Update or Other Action Approved reduction in groundwater monitoring from quarterly to semi-annual. Robert Weimer
6/10/2004 Document, Report, or Work plan Review - other Reviewed quarterly remediation system report. The soil vapor extraction system operated 100% of the time. 87.8 pounds of GRO and 1.4 pounds of benzene removed in this quarter. Robert Weimer
8/2/2004 Document, Report, or Work plan Review - other June 2, 2004 semi-annual groundwater sampling event. Up to 25 mg/l GRO and 5 ug/l benzene. Plume appears to be stable. Robert Weimer
8/25/2004 Document, Report, or Work plan Review - other Reviewed quarterly remediation system report. The soil vapor extraction system operated 100% of the time. 16 pounds of GRO and 1 pound of benzene removed in this quarter. Robert Weimer
12/6/2004 Document, Report, or Work plan Review - other September 21, 2004 semi-annual groundwater sampling event. Up to 35 mg/l GRO and 12,000 ug/l toluene. Plume appears to be stable. Robert Weimer
12/9/2004 Document, Report, or Work plan Review - other Reviewed quarterly remediation system report. The soil vapor extraction system operated 99% of the time. 24.8 pounds of GRO and 1.3 pound of benzene removed in this quarter. To date, the soil vapor extraction system has removed 3,563 pounds of GRO and 16.7 pounds of benzene. Robert Weimer
2/10/2005 Document, Report, or Work plan Review - other Reviewed fourth quarter 2004 remediation system report. The soil vapor extraction system operated 100% of the time. 5.7 pounds of GRO and 1.4 pound of benzene removed in this quarter. To date, the soil vapor extraction system has removed 3,569 pounds of GRO and 18.1 pounds of benzene. Robert Weimer
6/20/2005 Document, Report, or Work plan Review - other Reviewed first quarter 2005 remediation system report. The soil vapor extraction system operated 97% of the time. 6.9 pounds of GRO and 2.7 pound of benzene removed in this quarter. To date, the soil vapor extraction system has removed 3,576 pounds of GRO and 20.8 pounds of benzene. Robert Weimer
7/27/2005 Document, Report, or Work plan Review - other May 12, 2005 semi-annual groundwater sampling event. Up to 0.29 mg/l GRO (MW-11). Plume appears to be decreasing, but contaminant concentration drop may be related to a rise in the groundwater of 1.5 feet. Ground water flow direction to the north by northeast. Robert Weimer
8/4/2005 Meeting or Teleconference Held Meeting with Chevron to discuss future site work. Because of low recovery rates they are to turn off the existing system and they will monitor for any rebound in groundwater contamination concentrations. They are to sample the two highest contaminated wells for EDB and 1,2-DCA. Robert Weimer
8/17/2005 Document, Report, or Work plan Review - other Reviewed second quarter 2005 remediation system report. The soil vapor extraction system operated 95% of the time. 6.7 pounds of GRO and 2.6 pound of benzene removed in this quarter. To date, the soil vapor extraction system has removed 3,583 pounds of GRO and 23.4 pounds of benzene. Robert Weimer
9/8/2005 Document, Report, or Work plan Review - other Approved request to suspend operation of the remediation system due to low recovery rates. Chevron will monitor for any rebound in groundwater contamination concentrations. Robert Weimer
11/21/2005 Document, Report, or Work plan Review - other Reviewed third quarter 2005 remediation system report. The soil vapor extraction system operated 100% of the time. 1.7 pounds of GRO and 0.7 pound of benzene removed in this quarter. To date, the soil vapor extraction system has removed 3,585 pounds of GRO and 24.1 pounds of benzene. System shut down on August 18, 2005. To look for rebound in groundwater contamination levels. Robert Weimer
11/23/2005 Document, Report, or Work plan Review - other September 24, 2005 semi-annual groundwater sampling event. Up to 0.33 mg/l GRO (MW-11). The groundwater contamination concentrations appears to be increasing slightly. Ground water flow direction to the north by northeast. Depth to groundwater 41 to 44 feet below ground surface. Robert Weimer
1/10/2006 Meeting or Teleconference Held Meeting with Chevron's consultant to discuss future site work. Need to continue to sample groundwater for rebound and sample drinking water wells. Confirmation soil samples also needed prior to closure. Robert Weimer
1/24/2006 Meeting or Teleconference Held Inquiry from downgradient property owner. Sampling of drinking water wells is to continue for the foreseeable future. Robert Weimer
5/11/2006 Meeting or Teleconference Held Meeting with Chevron and their consultant to discuss future site work. Need to continue to sample groundwater for rebound and sample nearby drinking water wells. Confirmation soil samples also needed prior to closure. Robert Weimer
9/8/2006 Offsite Soil or Groundwater Disposal Approved DEC approves the thermal treatment of one drum of contaminated soil. Robert Weimer
10/3/2006 Document, Report, or Work plan Review - other May 14, 2006 semi-annual groundwater sampling event. Only one monitoring well (MW-10R) was located and sampled. That monitoring well was non-detect. The groundwater contamination concentrations appears to be stable. Ground water flow direction to the north by northeast. Depth to groundwater 41 to 43 feet below ground surface. Two nearby drinking water wells (Wilson/Lustman and Barbershop) were sampled and they were non-detect for contamination. Robert Weimer
10/3/2006 Meeting or Teleconference Held Discussed site with Chevron's consultant. Will need confirmation water sample from MW-4 area. Also need EDB sampling in MW-10R and MW-11, using 500 method that has a low enough detection limit. Robert Weimer
11/1/2006 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of contaminated purge water. Robert Weimer
11/7/2006 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of additional contaminated purge water. Robert Weimer
3/14/2007 Document, Report, or Work plan Review - other September 25-27, 2006 semi-annual groundwater sampling event. Three monitoring wells were sampled. Up to 1.7 mg/l GRO, and 2.7 ug/l benzene in the groundwater. The groundwater contamination concentrations increased in one monitoring well. Ground water flow direction to the north by northwest. Depth to groundwater 38 to 43 feet below ground surface. Three nearby drinking water wells (Wilson/Lustman, Barbershop, and Skadsem) were sampled and they were non-detect for contamination. Robert Weimer
3/30/2007 Document, Report, or Work plan Review - other October 17, 2006 semi-annual groundwater sampling event. Three monitoring wells were sampled. Up to 1.9 mg/l GRO, and 2.0 ug/l benzene in the groundwater. The groundwater contamination concentrations increased in one monitoring well. Ground water flow direction is generally to the north by northwest. Depth to groundwater 38 to 44 feet below ground surface. Three nearby drinking water wells were sampled and they were non-detect for contamination besides 0.4 ug/l methylene chloride found in two samples (which appears to be a laboratory contaminant). Robert Weimer
4/2/2007 Meeting or Teleconference Held Meeting with RP to discuss site. They are to sample monitoring wells MW-10R, MW-15, MW-11,and MW-1 in the May 2007 event. Robert Weimer
8/3/2007 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of contaminated purge water. Robert Weimer
10/10/2007 Document, Report, or Work plan Review - other March 29, 2007 semi-annual groundwater sampling event. Only one monitoring well was sampled. Two other monitoring wells were not sampled due to ice in the well. That well was non-detect for BTEX. Ground water flow direction is generally to the north by northwest. Depth to groundwater 41.46 feet below ground surface. Two nearby drinking water wells were sampled and they were non-detect for contamination besides 0.4 ug/l methylene chloride found in two samples (which appears to be a laboratory contaminant). Robert Weimer
10/10/2007 Update or Other Action DEC reviews and approves the decommissioning of the remaining on property monitoring wells and the old remediation system due to future closure of the service station and construction on the site. To meet with Chevron in December 2007 to discuss future replacement monitoring wells and soil confirmation samples. Robert Weimer
12/10/2007 Document, Report, or Work plan Review - other Review preliminary conceptual site model Robert Weimer
12/20/2007 Document, Report, or Work plan Review - other May 18, 2007 semi-annual groundwater sampling event. Three monitoring wells were sampled. Up to 3.5 mg/l GRO, 4 ug/l benzene, non-detect (<0.5 ug/l) 1,2-DCA, and 0.0098 ug/l EDB in the groundwater. Ground water flow direction was to the northwest. Depth to groundwater was 38.6 to 41.76 feet below ground surface. Two nearby drinking water wells were sampled and they were non-detect for contamination besides 0.3 ug/l methylene chloride found in one sample (which appears to be a laboratory contaminant). Robert Weimer
1/7/2008 Document, Report, or Work plan Review - other DEC conditionally approves December 11, 2007 UST Removal Compliance Sampling and Well Decommissioning Workplan. The condition was to use DRO/RRO analysis for hydraulic hoists. Also future soil and/or groundwater samples may be required to demonstrate that the previous releases meet default cleanup levels. Robert Weimer
1/15/2008 Site Visit Site visit to observe removal of underground storage tank system. Robert Weimer
1/31/2008 Document, Report, or Work plan Review - other DEC approves transport and storage of 120 cubic yards of contaminated soil from the west tank area at ASR. Robert Weimer
2/1/2008 Document, Report, or Work plan Review - other DEC approves revised request to transport and dispose of the 120 cubic yards of contaminated soil from the west tank area. Robert Weimer
2/14/2008 Document, Report, or Work plan Review - other DEC approves transport and treatment of 80 cubic yards of contaminated soil from the log crib area to ASR. Robert Weimer
3/4/2008 Document, Report, or Work plan Review - other September 25, 2007 semi-annual groundwater sampling event. Three monitoring wells were sampled. Up to 2.1 mg/l GRO, 4 ug/l benzene, non-detect (<0.5 ug/l) 1,2-DCA, and 0.0098 ug/l EDB in the groundwater. Ground water flow direction was to the northwest. Depth to groundwater was 38 to 45 feet below ground surface. Two nearby drinking water wells were sampled and they were non-detect for contamination besides 0.3 ug/l methylene chloride found in one sample (which appears to be a laboratory contaminant). Robert Weimer
3/4/2008 Document, Report, or Work plan Review - other July 9, 2007 semi-annual groundwater sampling event. Three monitoring wells were sampled. Up to 2.1 mg/l GRO, 2 ug/l benzene, non-detect (<0.5 ug/l) 1,2-DCA, and 0.0097 ug/l EDB in the groundwater. Ground water flow direction was to the west by northwest. Depth to groundwater was 38.8 to 43.51 feet below ground surface. Two nearby drinking water wells were sampled and they were non-detect for contamination besides 0.5 ug/l methylene chloride found in one sample (which appears to be a laboratory contaminant). Robert Weimer
3/5/2008 Meeting or Teleconference Held Meeting with Chevron and their consultants. Chevron to conduct and indoor air evaluation for this site. They will submit a plan for the installation of some replacement monitoring wells. They will also provide was workplan for collecting confirmation soil samples for the previous releases at this site. Robert Weimer
3/12/2008 Document, Report, or Work plan Review - other DEC approves reuse of 280 cubic yards of excavated soil generated during the removal of the gasoline tank and piping in January 2008. All soil samples collected from this stockpile meet default cleanup levels. Robert Weimer
5/8/2008 Document, Report, or Work plan Review - other Reviewed UST Compliance Sampling and Well Decommissioning Report. 12 monitoring wells were decommissioned in January 2008. A log crib was discovered and removed on January 24, 2008. A 600 gallon UST located near the southwest corner of the building and the hydraulic hoists were removed on January 16, 2008. The three 10,000 gallon tanks and piping were removed on January 14-15, 2008. Up to 363 mg/kg DRO was left at the log crib at 15 feet below ground surface (bgs). Up to 371 mg/kg DRO was left at hydraulic hoist 2 at 10 feet bgs. Up to 3.5 mg/kg benzene was left at 3.5 feet bgs at the piping just east of the northwest dispenser. Robert Weimer
5/27/2008 Document, Report, or Work plan Review - other DEC approves workplan for collecting confirmation soil and groundwater samples at this site. The workplan proposes to drill 9 soil borings and complete 4 of them as monitoring wells. Robert Weimer
5/29/2008 Site Visit Site visit to observe the drilling of confirmation soil borings and replacement monitoring wells. While at the site the neighbor complained about some surface oil stains near the west side of the property. Walked that part of the site with RP's consultant. Noted some small stained areas. RP's consultant will document the cleanup of those areas. Robert Weimer
5/30/2008 Site Visit At the request of the project manager, Robert Weimer, the quality assurance officer completed a field oversight inspection on 5/30/2008. The oversight was provided while the consultant advanced soild borings and converted several boring to montoring wells. No deviations from the work plan were noted. Brenton Porter
6/24/2008 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
6/24/2008 Document, Report, or Work plan Review - other DEC approves thermal treatment of 22 drums of contaminated soil drill cuttings. Robert Weimer
7/9/2008 Document, Report, or Work plan Review - other DEC approves treatment of 2 drums of contaminated purge water. Robert Weimer
9/25/2008 Document, Report, or Work plan Review - other DEC approves treatment of contaminated purge water. Robert Weimer
10/20/2008 Document, Report, or Work plan Review - other June 9, 2008 groundwater sampling event. Three monitoring wells were sampled. Up to 14 mg/l GRO, 5.6 mg/l DRO, and non-detect (<20 ug/l) benzene in the groundwater. Contaminant concentrations appear to be increasing. Ground water flow direction was to the west by northwest. Depth to groundwater was 39.0 to 42.67 feet below ground surface. Robert Weimer
10/20/2008 Document, Report, or Work plan Review - other DEC reviewed proposal to inject a hydrogen peroxide/sodium persulfate/water solution into monitoring well MW-11R. The workplan is not approved as proposed. May need an EPA permit to inject. ADEC has requested a workplan to define the extent of the groundwater contamination at this site. Robert Weimer
10/22/2008 Document, Report, or Work plan Review - other Subsurface Investigation and Well Installation Report. On May 28-30, 2008 5 soil borings and 4 replacement monitoring wells were installed at the site. Up to 13 mg/kg RRO, non-detect (<0.08 mg/kg) benzene, non-detect (<7.2 mg/kg) GRO, and non-detect (<5.2 mg/kg) DRO in the soil samples collected. Two samples had detection levels over the default cleanup levels for benzene (<0.08 mg/kg) at 45 ft bgs at SB-2, (<0.05 mg/kg) at 15 ft bgs at MW16). The shallow sample in boring MW-1R was collected at 6 feet below ground surface instead of 4 feet below ground surface called in for in the approved workplan. Robert Weimer
10/23/2008 Document, Report, or Work plan Review - other Review and conditionally approve workplan to collect confirmation samples from the 4 surface stained area excavated on May 29, 2008. The approval states that a site walk though next summer (2009) will be need to verify that no surface stained areas remain. Robert Weimer
10/24/2008 Update or Other Action RP's consultant notified ADEC that the surface soil sampling would be delayed until the summer of 2009. Robert Weimer
11/3/2008 Meeting or Teleconference Held Discussed site status with property owner. Current outstanding issues are indoor air evaluation, continued groundwater monitoring, conducting a release investigation to determine the extent of the remaining groundwater contamination, submitting a corrective action plan for the remaining groundwater contamination, collect confirmation samples to verify that the surface stained areas have been cleaned up, site walk-though to see if any visibly stained surface soils remain, and to collect supplemental confirmation soil samples of the subsurface investigation work conducted in May 2008 (4 feet at MW-1R [sample collected at 6 feet instead], 15 feet at MW-16 [0.05 mg/kg benzene detection limit], and 45 feet at SB-2)[0.08 mg/kg benzene detection limit]. Robert Weimer
11/17/2008 Document, Report, or Work plan Review - other DEC approves treatment of contaminated purge water. Robert Weimer
2/19/2009 Site Visit Per the request of the project manager, Robert Weimer, a quality assurance field visit was conducted on February 19, 2009 to observe field sampling activities at the site. No major deviations from standard sampling activiites were observed at the site. A copy of the site write up have been placed in the QA file and in the project file. Brenton Porter
2/25/2009 Meeting or Teleconference Held Meeting with Chevron and their consultants. Chevron to conduct and indoor air evaluation for this site. Need confirmation sampling for surface soils and site walk through. Need confirmation sampling at MW-1R at 4ft, MW-16 at 15ft, and SB-2 at 45 ft, Chevron to evaluate soil data of shallower and deeper that MW-16 and SB-2 which had detection limit problems. Chevron to provide in 2009/2010 workplan to define the source of the contamination found at monitoring well MW-11R. Robert Weimer
3/3/2009 Document, Report, or Work plan Review - other August 11, 2008 groundwater sampling event. Four monitoring wells were sampled. Up to 4.8 mg/l GRO, 2.7 mg/l DRO, and 10 ug/l benzene in the groundwater. Contaminant concentrations appear to be decreasing. Ground water flow direction was to the west by northwest. Depth to groundwater was 39.08 to 43.16 feet below ground surface. Two nearby drinking water wells (Wilson/Lustman and Barbershop) were sampled and were non-detect for VOCs. Robert Weimer
3/4/2009 Document, Report, or Work plan Review - other DEC approves treatment of contaminated purge water. Robert Weimer
4/16/2009 Document, Report, or Work plan Review - other October 30, 2008 groundwater sampling event. Four monitoring wells were sampled. Up to 5.8 mg/l GRO, 2 mg/l DRO, and 20 ug/l benzene in the groundwater. Contaminant concentrations appear to be increasing. Ground water flow direction was to the northwest. Depth to groundwater was 34.27 to 43.06 feet below ground surface. Two nearby drinking water wells (Wilson/Lustman and Barbershop) were sampled and were non-detect for VOCs. Robert Weimer
4/27/2009 Offsite Soil or Groundwater Disposal Approved DEC approves request to transport one drum of monitoring well purge water to 1441 C Street for secure storage. Robert Weimer
6/17/2009 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of one drum of contaminated purge water. Robert Weimer
7/2/2009 Document, Report, or Work plan Review - other DEC approves July 2, 2009 revised workplan to drill and sample 5 soil borings and to install up to 2 monitoring wells to help define the extent of the soil and groundwater contamination at the site. Robert Weimer
7/22/2009 Document, Report, or Work plan Review - other February 20, 2009 groundwater sampling event. Up to 13 mg/l GRO, 3.2 mg/l DRO, and non-detect (<50 ug/l) benzene in the groundwater. Contaminant concentrations increased in 1 of the 5 monitoring wells sampled. Ground water flow direction was to the northwest. Depth to groundwater was 39.35 to 43.35 feet below ground surface. Two nearby drinking water wells (Wilson/Lustman and Barbershop) were sampled and were non-detect for VOCs. Robert Weimer
7/23/2009 Update or Other Action DEC approves reduction in groundwater monitoring to semi-annual for monitoring wells MW-1R, MW-4R, MW-15R, and MW-16. Quarterly groundwater monitoring is to continue in monitoring well MW-11R, the new monitoring wells installed in July 2009, and the two nearby drinking water wells (Wilson/Lustman and Barbershop). Robert Weimer
8/20/2009 Offsite Soil or Groundwater Disposal Approved DEC approves request for thermal treatment of 4 drums of contaminated soil generated during the July 2009 Subsurface Investigation. Robert Weimer
9/8/2009 Site Visit Site visit to observe confirmation sampling at the areas where surface stained soils were removed in 2008. Sampling was not completed because of insufficient petro flag field screening kits. During site walk through additional surface stained areas were observed on the eastern portion of the site. Those appear to have occurred since May 2008. Consultant will contact Chevron so Chevron and the property owner can discuss who will be responsible for cleaning up the new surface stained areas. Robert Weimer
9/9/2009 Document, Report, or Work plan Review - other DEC conditionally approves revised surface sampling workplan. Robert Weimer
9/16/2009 Update or Other Action DEC receives notification from Chevron's consultant that they have not yet been able to get access to the property to the north to install the downgradient monitoring well requested. They also could not locate monitoring well MW-15, it appears to have been covered over during new road construction. They will continue to look for MW-15. Robert Weimer
10/21/2009 Document, Report, or Work plan Review - other May 11, 2009 groundwater sampling event. Up to 9.5 mg/l GRO, 2.2 mg/l DRO, and non-detect (<2.5 ug/l) benzene in the groundwater. Contaminant concentrations increased in 2 of the 5 monitoring wells sampled. Ground water flow direction was to the northwest. Depth to groundwater was 39.44 to 43.55 feet below ground surface. Two nearby drinking water wells (Barbershop and Wilson/Lustman) were sampled and were non-detect for VOCs except for methlyene chloride (5 ug/l cleanup level) at 0.3 ug/l in one well (Barbershop) and 0.7 ug/l in the other (Wilson/Lustman). Robert Weimer
10/29/2009 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of one drum of contaminated purge water. Robert Weimer
11/23/2009 Offsite Soil or Groundwater Disposal Approved Approved transport of two drums of contaminated soil to 15th & C Street secured storage area, then transport to and treatment at ASR in the summer of 2010. Post treatment analysis is VOCs, BTEX, GRO, DRO, and RRO. Robert Weimer
1/27/2010 Document, Report, or Work plan Review - other September 13, 2009 groundwater sampling event. Up to 7.0 mg/l GRO, 1.8 mg/l DRO, and non-detect (<40 ug/l) benzene in the groundwater. Contaminant concentrations increased in 0 of the 4 monitoring wells sampled. One of the monitoring wells (MW-15R) could not be located. Ground water flow direction was to the northwest. Depth to groundwater was 42.59 to 43.79 feet below ground surface. One nearby drinking water well (PSW29-1) at the barbershop to the north was sampled and it was non-detect for VOCs. Robert Weimer
2/1/2010 Document, Report, or Work plan Review - other October 7, 2009 groundwater sampling event. Just monitoring well MW-11R was sampled during this monitoring event. Up to 6.5 mg/l GRO, 1.6 mg/l DRO, and non-detect (<10 ug/l) benzene in the groundwater. Contaminant concentrations decreased in the one monitoring well sampled. One of the other monitoring wells (MW-15R) could not be located. Ground water flow direction was to the northwest. Depth to groundwater was 42.67 to 43.87 feet below ground surface. One nearby drinking water well (PSW29-1) at the barbershop to the north was sampled and it was non-detect for VOCs. Robert Weimer
3/4/2010 Document, Report, or Work plan Review - other DEC approves request to transport drums of monitoring well purge water to 1441 C Street for secure storage. Robert Weimer
3/11/2010 Meeting or Teleconference Held Meeting with Chevron and their consultants on 3/10/10. MW11R is to be sampled for PAH the next monitoring event. Chevron is having site access problems with the vacant lot land owner. Monitoring well MW15R may have been paved over, DEC to evaluate whether that monitoring well needs to be replaced. We discussed that groundwater samples for volatiles should not be collected with bailers or peristaltic pumps due to the loss of volatiles, Chevron is to provide a workplan specifying how groundwater samples will be collected in the future. Robert Weimer
4/8/2010 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of one drum of contaminated purge water. Robert Weimer
4/13/2010 Document, Report, or Work plan Review - other Vapor Intrusion Evaluation Report review. Groundwater at the site is around 40 to 45 feet below ground surface and no volatile chemicals have been identified as remaining in soil and groundwater above site cleanup levels within 30 feet of existing stuctures. The report recommends no additional vapor intrusion pathway investigation based on available site information. Robert Weimer
5/20/2010 Update or Other Action Approved, until further notice, no-purge groundwater sampling at this site. Robert Weimer
8/23/2010 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of contaminated purge water. Robert Weimer
8/27/2010 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of contaminated purge water. Robert Weimer
10/7/2010 Document, Report, or Work plan Review - other Subsurface investigation report. On July 14, 2009 four soil borings and surface soils were sampled. The surface samples were non-detect for contamination except for Arsenic which appears to be at naturally occuring levels in the soils. Soil boring SB09-1 had 0.030 mg/kg benzene at the soil-water interface at 45 feet below ground surface. Soil boring SB09-4 had soil samples that were non-detect for benzene but the detection limit exceeded site cleanup levels. Robert Weimer
11/3/2010 Offsite Soil or Groundwater Disposal Approved DEC approves request for thermal treatment of 7 drums of contaminated soil generated during the October 2010 Subsurface Investigation. Robert Weimer
11/17/2010 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of contaminated purge water. Robert Weimer
12/29/2010 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78086 1991 UST contamination. Robert Weimer
1/18/2011 Update or Other Action Updated GIS location. Robert Weimer
3/2/2011 Update or Other Action DEC approves temporary storage of any purgewater generated in 2011 at the secure area at 1441 C Street. Robert Weimer
3/4/2011 Document, Report, or Work plan Review - other February 25, 2010 groundwater sampling event. Just monitoring well MW-11R was sampled during this monitoring event. Up to 5.1 mg/l GRO, 1.0 mg/l DRO, and non-detect (<5 ug/l) benzene in the groundwater. Contaminant concentrations decreased in the one monitoring well sampled. Three of the other monitoring wells could not be located. Ground water flow historically has been to the northwest. Depth to groundwater was 42.75 to 43.54 feet below ground surface. One nearby drinking water well (PSW29-1) at the barbershop to the north was sampled and it was non-detect for VOCs except for 0.2 ug/l Chloromethane in a duplicate sample. Robert Weimer
3/9/2011 Document, Report, or Work plan Review - other May 5, 2010 groundwater sampling event. Up to 19 mg/l GRO, 3.1 mg/l DRO, and non-detect (<100 ug/l) benzene in the groundwater. Monitoring well MW-11R was also analyzed for PAHs. While 8 PAHs were detectable they were all below cleanup levels. Contaminant concentrations increased in two of the four monitoring well sampled. Ground water flow was to the northwest. Depth to groundwater was 42.64 to 43.87 feet below ground surface. One nearby drinking water well (PSW29-1) at the barbershop to the north was sampled and it was non-detect for VOCs. Robert Weimer
3/9/2011 Document, Report, or Work plan Review - other July 22, 2010 groundwater sampling event. Up to 15 mg/l GRO, 3.2 mg/l DRO, and non-detect (<50 ug/l) benzene in the groundwater. Contaminant concentrations increased in two of the two monitoring wells sampled. Ground water flow was to the west by northwest. Depth to groundwater was 42.74 to 43.85 feet below ground surface. One nearby drinking water well (PSW29-1) at the barbershop to the north was sampled and it was non-detect for VOCs. Robert Weimer
3/9/2011 Document, Report, or Work plan Review - other November 1, 2010 groundwater sampling event. Up to 12 mg/l GRO, 3.2 mg/l DRO, and non-detect (<25 ug/l) benzene in the groundwater. Contaminant concentrations decreased in three of the four monitoring wells sampled. Ground water flow was to the west by northwest. Depth to groundwater was 39.79 to 43.81 feet below ground surface. One nearby drinking water well (PSW29-1) at the barbershop to the north was sampled and it was non-detect for VOCs. Robert Weimer
3/9/2011 Update or Other Action DEC approves suspending the groundwater monitoring of monitoring wells MW-1R, MW-4R, and MW-16 until further notice. Robert Weimer
7/22/2011 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of contaminated purge water. Robert Weimer
11/21/2011 Offsite Soil or Groundwater Disposal Approved DEC approves treatment of contaminated purge water. Robert Weimer
12/7/2011 Document, Report, or Work plan Review - other March 3, 2011 groundwater sampling event. Up to 12 mg/l GRO, 2.5 mg/l DRO, and non-detect (<30 ug/l) benzene in the groundwater. Contaminant concentrations decreased in one of the three monitoring wells sampled. Ground water flow was to the north by northwest. Depth to groundwater was 40.11 to 44.03 feet below ground surface. One nearby drinking water well (PSW29-1) at the barbershop to the north was sampled and it was non-detect for DRO, GRO, and VOCs (except for chloromethane at 0.4 ug/l). Robert Weimer
12/13/2011 Document, Report, or Work plan Review - other May 24, 2011 groundwater sampling event. Up to 8.1 mg/l GRO, 2.6 mg/l DRO, and 26 ug/l benzene in the groundwater. Contaminant concentrations increased in one of the three monitoring wells sampled. Ground water flow was to the north by northwest. Depth to groundwater was 40.14 to 44.31 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barbershop to the north was sampled and it was non-detect for DRO, GRO, and VOCs. Robert Weimer
2/29/2012 Meeting or Teleconference Held Meeting with Chevron and their consultants on 2/28/12. Chevron plans to continue quarterly groundwater monitoring of the monitoring wells and the nearby drinking water wells. They have not been able to sample the Wilson/Lustman drinking water well located just to the west because the owner has not allowed them access. The second drinking water well (PSW29-1) at the barbershop to the north has been sampled and has been non-detect for VOCs. If the first two quarterly groundwater monitoring events in 2012 are below cleanup levels in all monitoring wells Chevron will request reduction to semi-annual groundwater monitoring. Chevron is still working on getting access from the owner of the vacant lot just to the north so Chevron can install a monitoring well on that property. Robert Weimer
3/7/2012 Meeting or Teleconference Held Meeting with Chevron and their consultants on 2/28/12. They are to continue quarterly groundwater monitoring. If the first two quarters of groundwater samples in 2012 are below cleanup levels Chevron will request a reduction to semi-annual groundwater monitoring. Robert Weimer
8/17/2012 Offsite Soil or Groundwater Disposal Approved DEC approves offsite treatment of contaminated purge water. Robert Weimer
10/22/2012 Document, Report, or Work plan Review - other May 28, 2012 groundwater sampling event. Up to 0.41 mg/l GRO, 2.0 mg/l DRO, and 2.4 ug/l benzene in the groundwater. Contaminant concentrations increased in three of the three monitoring wells sampled. Ground water flow was to the north by northwest. Depth to groundwater was 40.04 to 44.27 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barbershop to the north was sampled and it was non-detect for GRO and VOCs but had DRO at 0.12 mg/l. Robert Weimer
10/22/2012 Update or Other Action DEC review of request in reduction of groundwater monitoring to semi-annual. The concentrations increased in all 3 monitoring wells during the 5/28/12 monitoring event. Also monitoring well MW-17 had its highest DRO concentration ever (2 mg/l). Reviewing the project file we are missing the groundwater sampling reports for the 3/23/12, 11/1/11, and 10/6/11 monitoring events. DEC requested copies of each of those reports. Once DEC has reviewed the results of the October 2012 groundwater sampling and the missing reports DEC will look at whether a requests in reduction in groundwater monitoring can be approved. Robert Weimer
10/25/2012 Document, Report, or Work plan Review - other October 6, 2011 groundwater sampling event. Up to 0.20 mg/l GRO, 0.17 mg/l DRO, and non-detect (<30 ug/l) benzene in the groundwater. Contaminant concentrations increased in none of the three monitoring wells sampled. Ground water flow was to the north by northwest. Depth to groundwater was 43.56 to 45.20 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barbershop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Robert Weimer
10/26/2012 Document, Report, or Work plan Review - other November 1, 2011 groundwater sampling event. Up to 0.52 mg/l GRO, 0.22 mg/l mg/l DRO, and non-detect (<5 ug/l) benzene in the groundwater. Contaminant concentrations increased in one of the three monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 40.62 to 44.78 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barbershop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Robert Weimer
10/26/2012 Document, Report, or Work plan Review - other March 23, 2012 groundwater sampling event. Up to 0.02 mg/l GRO, 0.90 mg/l DRO, and non-detect (<5 ug/l) benzene in the groundwater. Contaminant concentrations increased in two of the three monitoring wells sampled. Ground water flow was to the north. Depth to groundwater was 40.87 to 44.86 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barbershop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Robert Weimer
11/28/2012 Offsite Soil or Groundwater Disposal Approved DEC approves offsite treatment of contaminated purge water. Robert Weimer
2/7/2013 Document, Report, or Work plan Review - other August 3, 2012 groundwater sampling event. Up to 1.1 mg/l GRO, 1.4 mg/l DRO, and non-detect (<5 ug/l) benzene in the groundwater. Contaminant concentrations increased in one of the three monitoring wells sampled. Ground water flow was to the north by northwest. Depth to groundwater was 39.78 to 43.90 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barbershop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Robert Weimer
2/27/2013 Meeting or Teleconference Held Meeting with Chevron and their consultants on 2/26/13. Chevron proposes to continue to conduct quarterly/semi-annual groundwater monitoring to monitor for natural attenuation and trends, and drinking water well sampling. Chevron is trying to obtain access to the Lustman drinking water wells and the property they own to the north of the Chevron property. The next groundwater sampling event they will sample both using no purge and purge help evaluate that the past no purge results were providing comparable data. We discussed that all semi-annual monitoring events need to be at least 120 days apart. Robert Weimer
3/26/2013 Update or Other Action DEC conditionally approves the use of a portable activated carbon (gac) filter system for this site to treat water generated during groundwater monitoring. The storage of water at the site or the secure storage area at 1441 C Street is also approved. Robert Weimer
4/10/2013 Document, Report, or Work plan Review - other November 4, 2012 groundwater sampling event. Up to 2.7 mg/l GRO, 2.0 mg/l DRO, and non-detect (<10 ug/l) benzene in the groundwater. Contaminant concentrations increased in 2 of the 4 monitoring wells sampled. Ground water flow was to the north by northwest. Depth to groundwater was 39.37 to 43.48 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Samples were collected with no purge using hydrasleeves for volatiles and bailers for DRO. Robert Weimer
1/13/2014 Document, Report, or Work plan Review - other March 26, 2013 groundwater sampling event. Up to 1.8 mg/l GRO, 2.7 mg/l DRO, and 0.61 ug/l benzene in the groundwater. Contaminant concentrations increased in 1 of the 3 monitoring wells sampled. Ground water flow was to the north. Depth to groundwater was 38.57 to 42.65 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Samples were collected with no purge using hydrasleeves from the top of the groundwater column in each monitoring well. Robert Weimer
2/7/2014 Document, Report, or Work plan Review - other June 8, 2013 groundwater sampling event. Up to 0.88 mg/l GRO, 1.7 mg/l DRO, and 0.60 ug/l benzene in the groundwater. Contaminant concentrations increased in 2 of the 3 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 38.26 to 42.58 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Samples were collect by both no-purge (Hydrasleeve) and purge (bladder pump) methods. The sampling interval for the bladder pump was not documented in the field notes. Because the Hydrasleeve sample intervals did not include the top of the water column the results should be considered biased low (MW-15RR sample was collected from 2.74 to 5.74 feet below surface of groundwater, MW-17 sample was collected from 3.63 to 6.63 feet below surface of groundwater, MW-11R sample was collected from 0.79 to 3.79 feet below surface of groundwater). Robert Weimer
2/12/2014 Document, Report, or Work plan Review - other August 18-19, 2013 groundwater sampling event. Up to 0.65 mg/l GRO, 1.7 mg/l DRO, and 0.80 ug/l benzene in the groundwater. Contaminant concentrations increased in 3 of the 3 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 38.22 to 42.45 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Samples were collected by no-purge (Hydrasleeve) collected at the top of the water column. Robert Weimer
3/10/2014 Meeting or Teleconference Held Meeting with Chevron and their consultants on 2/27/2014. They plan to continue semi-annual groundwater monitoring. Because of problems with last year’s purge/no-purge sampling the next groundwater sampling event they will sample both using no purge and purge help evaluate that the past no purge results were providing comparable data or they will switch to no purge for future sampling events. We discussed that the groundwater samples needs to be collected as close as possible to the soil/water interface, with the pump intake within a foot of the soil/water interface at the time of the sampling. After reviewing the results of the May 2014 groundwater sampling event the consultant may be requesting a reduction in ground water monitoring. In the future they will need to evaluate for a diving plume on the monitoring wells far from the release point. The consultant will make sure that their site reports are complete in accordance with DEC’s 9/23/2009 Site Characterization Work Plan and Reporting Guidance for Investigation of Contaminated Sites. Robert Weimer
3/13/2014 Document, Report, or Work plan Review - other November 5, 2013 groundwater sampling event. Up to 0.11 mg/l GRO, 0.80 mg/l DRO, and 0.33 ug/l benzene in the groundwater. Contaminant concentrations increased in 0 of the 3 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 37.62 to 41.83 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, VOCs and DRO. Samples were collect by no-purge (Hydrasleeve) not at the soil/water interface as required, they were collected at 1 to 4 feet in the water column. The groundwater monitoring results are considered biased low and can't be used to evaluate contaminant trends and extent of the groundwater contamination at this site. Robert Weimer
7/29/2014 Update or Other Action DEC approves request to reduce groundwater sampling from quarterly to semi-annual. Robert Weimer
9/19/2014 Conceptual Site Model Submitted Conceptual site model identified potential exposure for ingestion of groundwater. Robert Weimer
10/28/2014 Update or Other Action The Department requests at least two monitoring wells be installed on the Lustman property near its southern property boundary or along the northern property boundary of the Chevron Property. The Department requests that a work plan for the installation and sampling (soil and groundwater) of these monitoring wells be submitted by December 15, 2014. The Department also requests that until further notice that groundwater samples be collected by purge method at this site. Robert Weimer
12/2/2014 Update or Other Action The Department again requests at least two monitoring wells be installed on the Lustman property near its southern property boundary or along the northern property boundary of the Chevron Property. The Department requests that a work plan for the installation and sampling (soil and groundwater) of these monitoring wells be submitted by December 15, 2014. The Department also requests that until further notice that groundwater samples be collected by purge method at this site. Robert Weimer
12/16/2014 Document, Report, or Work plan Review - other March 25, 2014 groundwater sampling event. Non-detect GRO, DRO, and benzene in the groundwater in the 1 monitoring well (MW-17) sampled. The three most contaminated monitoring wells were not accessible this monitoring event and where not sampled. Ground water flow was to the northwest. Depth to groundwater was 40.20 to 41.24 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, VOCs and DRO. The one monitoring well sample was collected by purge (Bladder Pump) but not at the soil/water interface as required, the pump intake was at 1.98 feet below the soil/water interface. The groundwater monitoring results are considered biased low and can't be used to evaluate contaminant trends and extent of the groundwater contamination at this site. Robert Weimer
12/16/2014 Document, Report, or Work plan Review - other DEC approves December 2014 Monitoring Well Installation Work Plan. The work plan proposes to install two monitoring wells on the Lustman property near its southern property boundary. The Lustman property is located just north and downgradient of the former Chevron station property. Robert Weimer
4/6/2015 Document, Report, or Work plan Review - other May 6, 2014 groundwater sampling event. Up to 0.88 mg/l DRO, 0.24 ug/l benzene, and non-detect GRO in the groundwater. Concentrations increased in 2 of the 3 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 36.82 to 41.14 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, VOCs and DRO. The monitoring well samples were collect by purge (Bladder Pump) and no-purge (Hydrasleeve). The purge samples were not collected at the soil/water interface as required, the pump intake was at 1.93 to 2.0 feet below the soil/water interface. The groundwater monitoring results for the purge sampling are considered biased low and can't be used to evaluate contaminant trends and extent of the groundwater contamination at this site. Robert Weimer
7/9/2015 Document, Report, or Work plan Review - other November 8, 2014 groundwater sampling event. Up to 0.42 mg/l DRO, and non-detect benzene and GRO benzene in the groundwater. Concentrations increased in none of the 3 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 36.53 to 40.90 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO, and VOCs (analyzed outside of holding time so should be considered biased low) and had 0.12 mg/kg DRO. The monitoring well samples were collected by purge (Bladder Pump). The samples were collected at the soil/water interface as required. Robert Weimer
10/8/2015 Document, Report, or Work plan Review - other DEC approves on-property disposal of one drum of development water generated during the recent installation of monitoring wells MW-18 and MW-19. The groundwater samples meet default cleanup levels. The disposal will need to be a minimum of 100 feet from any drinking water wells. Robert Weimer
10/30/2015 Document, Report, or Work plan Review - other DEC approves request to spread on-property ten 55-gallon drums of drill cuttings that were generated during the installation the two off-property monitoring wells MW-18 and MW-19. The analytical soil samples collected from these borings all met most stringent soil cleanup levels. DEC requests that the soil be spread at least 100 feet from any drinking water wells and be placed so there is not any runoff off-property from the spread soils. Robert Weimer
1/25/2016 Update or Other Action DEC approves extension request to submit the 2nd semi-annual 2015 groundwater monitoring report by February 29, 2016. Robert Weimer
5/5/2016 Document, Report, or Work plan Review - other June 8-9, 2015 groundwater sampling event. Up to 1.7 mg/l DRO, 0.45 mg/l GRO, and 0.6 ug/l benzene in the groundwater. Concentrations increased in 2 of the 5 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 31.40 to 44.48 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO and VOCs. The monitoring well samples were collected by purge (Bladder Pump). The samples were collected at the soil/water interface as required. Robert Weimer
5/27/2016 Document, Report, or Work plan Review - other On June 3-4, 2015 monitoring wells MW-18 and MW-19 were installed on the Lustman property near its southern property boundary. The Lustman property is located just north and downgradient of the former Chevron station property. Soil samples were collected at the soil/water interface at both locations. The soil samples had up to 1.3 mg/kg GRO, 0.017 mg/kg benzene, below current and proposed clean up levels for PAHs, and non-detect for DRO. Robert Weimer
9/12/2016 Document, Report, or Work plan Review - other March 11, 2016 groundwater sampling event. Up to 0.26 mg/l DRO, 0.14 mg/l GRO, and non-detect ug/l benzene in the groundwater. Concentrations increased in 1 of the 3 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 37.82 to 42.11 feet below ground surface. The monitoring well samples were collected by purge (Bladder Pump). The samples were collected at the soil/water interface as required. Robert Weimer
9/12/2016 Document, Report, or Work plan Review - other May 13, 2016 groundwater sampling event. Up to 0.32 mg/l DRO, 0.075 mg/l GRO, and non-detect benzene in the groundwater. Concentrations increased in 3 of the 4 monitoring wells sampled. Ground water flow was to the northwest. Depth to groundwater was 38.10 to 42.44 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO and VOCs. The monitoring well samples were collected using a bladder pump after purging. The samples were collected at the soil/water interface as required. Robert Weimer
9/12/2016 Update or Other Action DEC requests that monitoring wells MW-11R, MW-15RR, MW-17, MW-18, and MW-19 be sampled in the fall of 2016 and analyzed for PAHs, DRO, GRO, and BTEX. Based on the results of the groundwater sampling ADEC will evaluate this site for reduction of groundwater monitoring. Robert Weimer
2/10/2017 Update or Other Action DEC requested that the consultant provide the full 8260 analysis results (only BTEX was provided) from the lab for the last two groundwater monitoring events. Robert Weimer
3/22/2017 Document, Report, or Work plan Review - other August 16, 2016 groundwater sampling event. Up to 0.23 mg/l DRO, 0.17 mg/l GRO, and 0.7 ug/l benzene in the groundwater. The DRO results are considered biased low because they were extracted and analyzed outside of holding time (30 days after sample collection). Concentrations increased in 2 of the 4 monitoring wells sampled. Ground water flow was to the north. Depth to groundwater was 38.54 to 42.58 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO and VOCs. The monitoring well samples were collected using a bladder pump after purging. A sample from MW-17 was not collected due to an obstruction and depth to groundwater measurements in MW-1R and MW-4R were not collected because they were buried and could not be located. The samples were collected at the soil/water interface as required. Robert Weimer
3/22/2017 Document, Report, or Work plan Review - other October 13, 2016 groundwater sampling event. Up to 0.21 mg/l DRO, 0.13 mg/l GRO, and 0.7 ug/l benzene in the groundwater. Concentrations increased in 3 of the 5 monitoring wells sampled. Ground water flow was to the north. Depth to groundwater was 38.44 to 42.62 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO and VOCs. The monitoring well samples were collected using a bladder pump after purging, except MW-17 that was collected after purging with a bailer due to an obstruction and depth. The depth to groundwater measurements in MW-1R and MW-4R were not collected because they were buried and could not be located. The samples were collected at the soil/water interface as required. Robert Weimer
3/28/2017 Update or Other Action DEC approves request to not conduct the first quarterly groundwater monitoring event in 2017. The next sampling event is to be conducted in April 2017, which will include analysis for full 8260 for VOCs. Robert Weimer
6/16/2017 Document, Report, or Work plan Review - other April 24-26, 2017 groundwater sampling event. Up to 0.94 mg/l DRO and 0.042 mg/l GRO in the groundwater. Groundwater sampled were non-detect for VOCs and PAHs except for Acenaphthene 0.028 ug/l, Benzo(b)fluorathene 0.013 ug/l, Benzo(g,h,i)pyrene 0.014 ug/l, Chrysene 0.010 ug/l, Indeno(1,2,3-cde)pyrene 0.010 ug/l, Naphthalene 0.58 ug/l, Phenanthrene 0.081 ug/l, Isopropylbenzene 3.0 ug/l, and Trichlorofluornathe 1.0 ug/l. Concentrations increased in 1 of the 5 monitoring wells sampled. Ground water flow was to the north. Depth to groundwater was 39.06 to 43.27 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO and VOCs. The monitoring well samples were collected using a bladder pump after purging, except MW-17 that was collected after purging with a bailer due to an obstruction and depth. The samples were collected near the soil/water interface as required. Robert Weimer
9/27/2017 Document, Report, or Work plan Review - other September 14, 2017 groundwater sampling event. Up to 0.7 ug/l ethylbenzene, 1.0 ug/l trichlorofluoromethane, 2.0 ug/l isopropylbenzne, 2.0 ug/l methylcyclohexane, 0.079 mg/l DRO and 0.091 mg/l GRO in the groundwater. Groundwater sampled were non-detect for other VOCs. Concentrations increased in 1 of the 5 monitoring wells sampled. Ground water flow was to the north. Depth to groundwater was 39.09 to 43.29 feet below ground surface. One nearby drinking water wells (PSW29-1) at the barber shop to the north was sampled and it was non-detect for GRO and VOCs. The monitoring well samples were collected using a bladder pump after purging. The samples were collected near the soil/water interface as required. Robert Weimer
9/28/2017 Update or Other Action Based on the information provided DEC is recommending the site for closure. Prior to closure all of the on and off property monitoring wells need to be properly decommissioned in accordance with a DEC approved work plan. DEC requests a work plan for the decommissioning of the monitoring wells. Robert Weimer
1/10/2018 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78086 1991 UST contamination. Robert Weimer
6/6/2018 Document, Report, or Work plan Review - other DEC approves work plan to decommission all of the on and off property monitoring wells. The work is scheduled for June 13, 2018. Robert Weimer
2/1/2019 Document, Report, or Work plan Review - other On June 13, 2018 the eight remaining monitoring wells (MW-1R, MW-4R, MW-11R, MW-15RR, MW-16, MW-17, MW-18, and MW-19) were decommissioned in accordance with the DEC approved work plan. Five of the monitoring well were located on the property of the former Chevron gas station. The other three monitoring wells were on nearby properties. Robert Weimer
5/16/2019 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78086 1991 UST contamination. Robert Weimer
6/10/2019 Cleanup Complete Determination Issued Site closure letter issued on June 10, 2019. Robert Weimer

Contaminant Information

Name Level Description Media Comments
Ethylene dibromide < Table C Groundwater
Ethylene dibromide < Method 2 Most Stringent Soil
Benzene < Table C Groundwater
Benzene < Method 2 Most Stringent Soil
DRO < Table C Groundwater
DRO < Method 2 Most Stringent Soil
GRO < Table C Groundwater
GRO < Method 2 Most Stringent Soil
RRO < Table C Groundwater
RRO < Method 2 Most Stringent Soil

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)

No associated sites were found.

Missing Location Data

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