| Action Date |
Action |
Description |
DEC Staff |
| 3/2/1990 |
Release Investigation |
SI; Earth Contours contracted to determine presence of hydrocarbon contamination at former UST site. Four borings indicated groundwater contamination up to 470 ppm toluene. |
Former Staff |
| 4/12/1990 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77820 ADD; |
Former Staff |
| 4/12/1990 |
Site Added to Database |
|
Former Staff |
| 7/2/1991 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; Texaco Refining & Marketing, Inc. submitted workplan for subsurface investigation and monitoring well installation. |
Former Staff |
| 10/1/1992 |
Release Investigation |
SA2; Kalu |
Former Staff |
| 9/4/1993 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; Kalu - Tanks and some source material has been removed. Treatability studies is in progress. |
Former Staff |
| 2/14/1994 |
Update or Other Action |
RPL2; Peterson sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning contaminated site. RP responded with update and completed information form. RP requests further database correspondence be with: Texaco Environmental Services, 3400 188th St., suite 630-A, Lynnwood, WA. 98037, (206) 774-6090. |
Former Staff |
| 6/6/1994 |
Update or Other Action |
CORR; Wingerter sent letter informing RP of their financial liability under new ADEC cost recovery policy. State is authorized, under Section 9003(h) of the Resource Conservation and Recovery Act to take action on this LUST facility. |
Former Staff |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: TEXACO REFINING & MARKETING INC. |
Former Staff |
| 10/18/2001 |
Update or Other Action |
JBC: request for information and copies of files to Tina Fisher, Paralegal
Hughes Thorsness Powell Huddleston & Bauman LLC
550 West Seventh Avenue, Suite 1100
Anchorage, AK 99501. Not formal FOIA request, but sent 'major' files of my determination to their offices. |
John Carnahan |
| 12/5/2002 |
Update or Other Action |
Met with Chevron and Secor; the system is off, monitoring will continue, and NFRAP request may be submitted next year. |
Janice Wiegers |
| 12/16/2002 |
Update or Other Action |
Groundwater Monitoring Report submitted. Samples collected in March contained a maximum benzene concentration of 420 ppb (MW-6) and GRO of 42.4 ppm (MW-9). |
Janice Wiegers |
| 12/16/2002 |
Update or Other Action |
Groundwater Monitoring Report submitted. Samples collected in September contained a maximum benzene concentration of 20 ppb (MW-10) and GRO of 25.5 ppm (MW-13). |
Janice Wiegers |
| 6/18/2003 |
Document, Report, or Work plan Review - other |
Groundwater Monitoring Report submitted. Samples collected in April contained a maximum benzene concentration of 250 ppb (MW-6) and GRO of 41 ppm (MW-9). |
Janice Wiegers |
| 10/2/2003 |
Document, Report, or Work plan Review - other |
Fall groundwater monitoring report submitted. Eight wells sampled. Maximum concentrations were 35 ppm GRO (MW-9) and 50 ppb benzene (MW-13). |
Janice Wiegers |
| 12/4/2003 |
Update or Other Action |
ADEC met with ChevronTexaco about all Fairbanks sites. Decommissioning of wells MW-1, 12, 14, 15, and 16 approved. Monitoring of other wells will continue. |
Janice Wiegers |
| 6/17/2004 |
Document, Report, or Work plan Review - other |
Groundwater monitoring report submitted. Contaminant trends remain stable. |
Janice Wiegers |
| 12/17/2004 |
Document, Report, or Work plan Review - other |
Groundwater monitoring report submitted for September 20 sampling event. MW-3, MW-12, MW-14, MW-15, and MW-16 were decommissioned. Groundwater results are within historical ranges, although benzene and GRO increased in the off-site well MW-13. |
Janice Wiegers |
| 6/21/2005 |
Document, Report, or Work plan Review - other |
ADEC received Semi-Annual Groundwater Monitoring Report for the First Semi-Annual 2005. Samples were collected on April 4, 2005. GW samples were analyzed for GRO and BTEX. GRO was detected in 9 of the 11 samples with concentrations ranging from 32 ug/L from MW-13 to 26,000 ug/L from MW-9. Benzene was detected in 7 of the 11 samples ranging from 2.3 ug/L from MW-1 to 78 ug/L from MW-6. |
Deborah Williams |
| 11/4/2005 |
Document, Report, or Work plan Review - other |
ADEC received a 2005 Monitoring Replacement Report. SECOR had Discovery Drilling Inc. install a replacement monitoring well (MW-39) to the depth of approximately 22 feet bgs. |
Deborah Williams |
| 12/30/2005 |
Document, Report, or Work plan Review - other |
ADEC received the Second Semi-Annual 2005 Groundwater Monitoring Report for the former Texaco 21-1079 site located at 1501 South Cushman. During this sampling event, eight wells were sampled. GRO was detected in seven of the eight samples collected with concentrations up to 20,000 ug/L (MW-9). Benzene was detected in two of the eight samples at concentrations up to 13 ug/L (MW-13). The concentration of benzene in MW-1, MW-4, MW-5, MW-9 and MW-10 could not be determined because of the presence of interferent. Oasis also performed a COPC where two of the hottest samples were analyzed for DRO, RRO, RCRA metals, PAHs, and selected VOCs. All eight groundwater samples were analyzed for 1,2 - dibromoethane (EDB) and 1,2-DCA. EDB, DCA, RCRA metals, PAHs, and RRO were not detected above ADEC cleanup levels. Levels up to 1,400 ug/L DRO were detected in the two wells sampled. |
Deborah Williams |
| 6/13/2006 |
Update or Other Action |
ADEC received the First Semi-Annual 2006 Groundwater Monitoring Report for the former Texaco Service Station site. GRO was detected in ten of the twelve samples collected ranging from 10 ug/L to 24,000 ug/L (MW-7). Benzene was detectedin five of the twelve samples at concentrations ranging from 2.3 ug/L to 250 ug/L (MW-6). |
Deborah Williams |
| 4/18/2007 |
Exposure Tracking Model Ranking |
Initial ranking completed. |
Deborah Williams |
| 6/21/2007 |
Leaking Underground Storage Tank Corrective Action Underway |
Work plan for soil vapor assesment reveiwed and approved. ARCADIS BBL will install a permanent sampling vapor probe containing two sample lines set at five feet and nine feet below ground surface. This probe will be installed near MW-6 which is the location of the highest remaining volatile groundwater concentrations at the site. The proposed work is tentatively scheduled for late July. |
Former Staff |
| 1/17/2008 |
Update or Other Action |
DEC received the ARCADIS Soil Vapor Assessment Report for Former Chevron 211079. Results indicate concentrations of benzene in the vapor probe exceed the EPA screening level of 0.98 ppb by volume. Vapor sampling will be conducted again in the spring of 2008 ,an ambient air sample will also be collected. |
Tamara Cardona-Marek |
| 8/7/2008 |
Update or Other Action |
Received call from member of the Church that owns the property. Church wants to put a fence and is willing to provide access for monitoring or a key. Inquired about the status of the site. |
Tamara Cardona-Marek |
| 12/9/2008 |
Update or Other Action |
ADEC received the Annual 2008 Groundwater Monitoring Report and the 2008 Vapor Intrusion Assessment. Volatiles detected in soil gas were all below screening levels. No further vapor intrusion assessment is needed at this time. Groundwater monitoring results indicate GRO is present in MW-9 (located at a residence) at concentrations of 19.6 ppm, DRO, benzene and ethylbenzene also above cleanup levels. GRO in MW-1, MW-4, MW-6, MW-11 and MW-10 also above cleanup levels. Highest benzene in MW-6 at 44ppb. No recommendations were submitted by Arcadis. |
Tamara Cardona-Marek |
| 3/13/2009 |
Meeting or Teleconference Held |
ADEC discussed with Arcadis and Chevron the status of the site. ADEC requested that additional soil vapor sampling is done at the residential property where MW-9 is located. ADEC requested that MNA parameters are measured and that additional petroleum contaminants are included as part of the TO-15 analysis. ADEC also pointed out the need to confirm the status of the soil at the source area, since it has not been sampled since prior to the installation of the treatment system. |
Tamara Cardona-Marek |
| 5/11/2009 |
Proposed Plan |
ADEC received the Work Plan for Additional Soil Vapor Assessment. Work Plan proposes the placement of a vapor probe at the residential property where MW-9 is located at. |
Tamara Cardona-Marek |
| 7/16/2009 |
Update or Other Action |
A potential buyer of the residence where well MW-9 is located contacted DEC for information regarding his responsibility and involvement if he purchased the property. Buyer is concerned that DRO levels seem to have increased over the past 4 years. Howevere, only 3 DRO samples are available and no particular trend can be predicted. DEC indicated that, at the time, the DRO is considered part of the gasoline spill. DEC also indicated that vapor probes are scheduled to be installed on the property and installation includes screening of soil and sample collection. Buyer may consider hiring an environmental consultant to sample soil around the heating oil tank to make sure there are no leaks. |
Tamara Cardona-Marek |
| 7/16/2009 |
Document, Report, or Work plan Review - other |
ADEC received and reviwed the Addendum to the Work Plan for Additional Soil Vapor Assessment. Arcadis plans to use TO-15 and TO-17 to analyze vapor samples for all petroleum-related volatile compounds. Plan has been approved. |
Tamara Cardona-Marek |
| 2/1/2010 |
Document, Report, or Work plan Review - other |
DEC received the 2009 Vapor Assessment and Annual Groundwater and MNA Report for the Texaco site at 1501 South Cushman. Contaminant concentrations seem to have decreased from previous sampling events. GRO, DRO and benzene concentrations remain above cleanup levels in MW-5, MW-9, and MW-10 (except DRO). Benzene was the only contaminant above cleanup levels in MW-11 and MW-6. A soil vapor probe was installed near the residence where MW-9 is located. No contaminants were detected above the residential screening levels. Geochemical parameter concentrations indicate the plume is anaerobic. |
Tamara Cardona-Marek |
| 3/12/2010 |
Meeting or Teleconference Held |
DEC met with CRA and Chevron to discuss the actions for the site in 2010. CRA will submit a CSM and a site assessment workplan to investigate the soil in the source area. Annual groundwater monitoring and sampling will be completed also. |
Tamara Cardona-Marek |
| 5/26/2010 |
Update or Other Action |
DEC requested that Chevron sample for sulfolane one well within the source area to determine if sulfolane may be a COC. |
Tamara Cardona-Marek |
| 10/4/2010 |
Site Characterization Workplan Approved |
DEC received from CRA a work plan to conduct soil sampling by installing soil borings on the property near the areas where soil contamination has been identified in the past. A maximum of 5 soil borings will be installed. DEC approved the work plan after requested revisions were submitted. |
Tamara Cardona-Marek |
| 2/24/2011 |
Meeting or Teleconference Held |
DEC met with Chevron to discuss the proposed 2011 site activities. CRA is planning to conduct additional subsurface investigation near MW-6. Will review old subsurface data before submitted a workplan to make sure levels in soil require additional investigation. |
Tamara Cardona-Marek |
| 2/28/2011 |
Document, Report, or Work plan Review - other |
DEC received and reviewed CRA's subsurface investigation report. CRA installed and sampled soil borings near the dispenser islands and former tank locations. No contamination identified. However, soil boring locations are not the locations that were in the final approved workplan from October 2010. |
Tamara Cardona-Marek |
| 7/8/2011 |
Site Characterization Workplan Approved |
DEC approved the continuation of the work proposed in 2010 (soil boring across the street near MW-6) that was not finalized in 2010 due to access issues. |
Tamara Cardona-Marek |
| 8/2/2011 |
Meeting or Teleconference Held |
DEC met with Chevron and consultant to discuss issues with access to the cross-gradient property and how this may impact site closure in the future. |
Tamara Cardona-Marek |
| 8/2/2011 |
Site Visit |
Site visit with DEC intern, Chevron and consultant during groundwater monitoring activities. |
Tamara Cardona-Marek |
| 1/27/2012 |
Document, Report, or Work plan Review - other |
DEC received the Annual 2011 Groundwater Monitoring and Sampling Report. Results are consistent with those from recent monitoring events. DRO and GRO exceeded cleanup levels in wells MW-5 and MW-9. Highest DRO and GRO concentrations were 3.7 and 5.9 ppm respectively for well MW-5. Benzene was above the cleanup level at 0.0078 in MW-5 also. |
Tamara Cardona-Marek |
| 2/29/2012 |
Meeting or Teleconference Held |
DEC met with Chevron and CRA to discuss actions to be completed in 2012. Last soil boring near MW-6 will be installed and soil sampled from this offsite location. An updated conceptual site model will be submitted. |
Tamara Cardona-Marek |
| 5/2/2012 |
Update or Other Action |
DEC received a request from the adjacent (north-vacant) property owner to remove monitoring wells from property for property transfer. CRA verified that the wells have had several sampling events with no detections. Decommissioning will take place this summer. |
Tamara Cardona-Marek |
| 9/6/2012 |
Document, Report, or Work plan Review - other |
Revised Well Decommissioning Work Plan has been received and approved.
|
Tamara Cardona-Marek |
| 12/31/2012 |
Document, Report, or Work plan Review - other |
DEC received and reviewed the Groundwater monitoring and Sampling report and the Groundwater Monitoring Well Decommissioning Report from CRA. DRO and GRO were detected above groundwater cleanup levels in MW-5 and MW-9. Benzene was above cleanup levels in MW-1, MW-5, MW-9, MW-10, MW-11, and MW-13. MNA parameters were taken; dissolved oxygen was high in some source area wells, which may indicate that microbes are not active and not breaking down contaminants. Alternatively, infiltration of recent precipitation may be increasing dissolved oxygen content in these wells. The well decommissioning report indicates that MW-13 was decommissioned as previously approved, despite the presence of benzene. |
Robert Burgess |
| 2/27/2013 |
Meeting or Teleconference Held |
DEC met with Chevron and CRA to discuss current status and future work. MW-13 had benzene detection but was decommissioned as previously approved. This field season will include decommissioning MW-6 after sampling in order to avoid further issues with access. Additional locations for wells to replace MW-6 and MW-13 will be identified this season. Also discussed getting better MNA data by sampling in winter when aquifer is near steady state and less likely to be affected by infliltration of precipitation or fluctuating water tables. |
Robert Burgess |
| 7/17/2013 |
Document, Report, or Work plan Review - other |
DEC received and reviewed the Soil Vapor Extraciton and Air Sparge System Decommissioning Workplan. The AS/SVE wells will be decommissioned according to procedures in the Monitoring Well guidance, and horizontal piping will be capped and left in place. |
Robert Burgess |
| 7/23/2013 |
Document, Report, or Work plan Review - other |
DEC approved of the revised AS/SVE system decommissioning workplan. Wells will be decomissioned according to DEC's monitoring well guidance preferred methods, horizontal piping will be capped and left in place, and system equipment will be decomposed. Excavation activities will include field screening of soil. |
Robert Burgess |
| 7/29/2013 |
Update or Other Action |
DEC project manager recieved a call from CRA personnel who were in the field decommissioning the remedial system. The field technician stated that the manifold piping was not as was described in the workplan; rather, piping entered the ground and "elbowed" at 90 degrees, and therefore the piping could not be decomissioned as described in the workplan (by removing vertical sections and capping horizontal sections in place). Instead, vertical sections of piping were filled with hydrated bentonite after approval from the ADEC project manager. Vertical sections were then capped with PVC caps. |
Robert Burgess |
| 1/14/2014 |
Document, Report, or Work plan Review - other |
DEC reviewed the Annual 2013 Groundwater Monitoring and Sampling report. Hydrocarbon concentrations remain above cleanup levels in source area wells as well as MW-9 and MW-10. Natural Attenuation parameters may indicate that biodegradation is occurring, however data quality concerns including analyses out of hold times result in uncertainty in making this determination. |
Robert Burgess |
| 1/16/2014 |
Document, Report, or Work plan Review - other |
DEC reviewed the Remediation System Decommissioning report dated December 2013. The report describes the decomissioning of the AS/SVE system that has been inactive for several years. Manifold pipes were removed and vertical piping was decomissioned by filling with bentonite. Some large system components remain on site and will be removed in 2014. The report did not document deviations from the workplan including the filling of vertical piping with bentonite. The report stated that AS/SVE points will be decommissioned in 2014, however it did not state why the decommissioning could not occur on schedule. |
Robert Burgess |
| 2/26/2014 |
Meeting or Teleconference Held |
DEC project manager met with Chevron and their consultants, CRA. Chevron has a new project manager who attended the meeting. The remedial system has been decommissioned, with the exception of air sparge and soil vapor extraction wells, which will be decommissioned in the 2014 field season. Access issues to property containing MW-6 and VP-1 persist. DEC agreed to assist in contacting the property owner to help gain access to the property in order to decommission the well and vapor point and to take a single confirmation boring for soil sampling. MW-13 will also be replaced during the field efforts in 2014. |
Robert Burgess |
| 4/1/2014 |
Document, Report, or Work plan Review - other |
The DEC reviewed and approved the February 2014 Revised Remediation System Decommissioning Report. The revised report addressed work plan deviations and indicated decommissioning was to occur in the spring of 2014 to reduce drill rig mobilization costs.
|
Robert Burgess |
| 6/12/2014 |
Site Visit |
DEC received a call from field technicians working at the site during decommissioning of air sparge and soil vapor extraction wells. The well construction was not what the technicians expected, and the DEC project manager visited the site with a copy of the 1995 remedial system installation report to assist. Through discussion, CRA and DEC decided to decommission wells using pressure grouting instead of the methods described in the workplan. |
Robert Burgess |
| 6/13/2014 |
Site Visit |
DEC visited the site to observe AS/SVE well decommissioning with pressure grouting. Since no as-builts were available for the system piping, field staff were unsure of well connections, however pressure grouting appeared to fill horizontal piping and well connections were discovered. |
Robert Burgess |
| 1/26/2015 |
Document, Report, or Work plan Review - other |
DEC reviewed the Well Installation and Decommissioning Report dated January 2015. On June 13, 2014 one soil boring was completed and a monitoring well, MW-14, was installed in the boring to determine if contaminants were moving downgradient. Analysis of soil samples from the boring did not detect contaminants of concern above cleanup levels. MW-14 could not be developed and sampled due to road construction. Two soil vapor extraction wells (V-1 and V-2) and seven air sparge wells (SP-1-through SP-7) were decommissioned. Onsite DEC approval was required to seal horizontal piping extending from the wells that were not anticipated in the original work plan. Pressure testing of each well was conducted to verify appropriate seals were in place. Well casings were cut two feet below ground, sealed and capped with gravel and concrete. |
Robert Burgess |
| 2/24/2015 |
Meeting or Teleconference Held |
ADEC project manager met with Chevron and CRA via teleconference. MW-14 was installed but not sampled due to road construction in summer 2014. Negotiations are still underway for access to downgradient property on which MW-6 and VP-1 are located; Chevron is optimistic about gaining access this field season. Current plans for field work include replacing VP-2 and investigating vapor intrusion pathways for the property to the north of the source area, sampling VP-1 and MW-6, installing borings near MW-6 to evaluate soil, and continuing with groundwater monitoring but switching to annual sampling instead of semi-annual. If access to property across Cushman St. is granted as a one-time access, MW-6 and VP-1 will be decommissioned after sampling. |
Robert Burgess |
| 4/23/2015 |
Document, Report, or Work plan Review - other |
The 2015 Groundwater Monitoring and Sampling Work Plan was reviewed and approved. |
Robert Burgess |
| 5/12/2015 |
Document, Report, or Work plan Review - other |
DEC reviewed and approved the Soil Vapor Probe Decommissioning Work Plan with requested modifications including requirements to backfill voids properly and photo document the decommissioning process. |
Robert Burgess |
| 9/28/2015 |
Document, Report, or Work plan Review - other |
DEC approved of the August 2015 Revised Soil Vapor Sampling Work Plan with conditions that field measurements including leak detection measurements be included in field notes, and a minimum of 48 hours notification be provided to DEC prior to conducting leak checks or sampling the soil gas probes to allow the DEC to conduct a site inspection. |
Todd Blessing |
| 2/24/2016 |
Meeting or Teleconference Held |
Teleconference meeting between ADEC and Chevron consultants from GHD. soil vapor probe VP-2 was sampled, results will be presented in a report. Planned work for 2016 include groundwater and SVE sampling, and a one-time sampling of MW-6 and VP-2, which will then be properly abandoned. Reports will be submitted to the DEC after sampling. |
Shawn Tisdell |
| 6/21/2016 |
Document, Report, or Work plan Review - other |
The Annual 2015 Groundwater Monitoring Report prepared by GHD was reviewed by the DEC. The DEC concurs with GHD to continue annual groundwater monitoring in 2016 and to suspend groundwater sampling of wells MW-1 and MW-4 as contaminants of concern have not been observed in those wells for several years. Wells will be resurveyed in 2016. Off-property well MW-9 slightly exceeded the GRO cleanup level and the newly developed well MW-14R exceeded benzene cleanup levels (0.062 mg/L vs a 0.005 mg/L cleanup level). MW-5 was the only on site well to exceeded cleanup levels (DRO and GRO). The DEC recommends the RP to modify the groundwater monitoring work plan to include naphthalene as it may exceed the new proposed cleanup levels. Another round of groundwater monitoring will take place in 2016. |
Shawn Tisdell |
| 8/23/2016 |
Document, Report, or Work plan Review - other |
The DEC reviewed and approved the "Soil Vapor Assessment Report" received on July 18. According to the report, soil vapor probe VP-2 was sampled in September of 2015, and February of 2016, in accordance with DEC approved 2014 Soil Vapor Sampling Plan. No benzene has been detected above ADEC target levels in any soil vapor samples collected at the site. Site access was not granted to GHD personnel for VP-1 during these sampling events. We concur with GHD recommendations that after offsite access is granted, an additional soil vapor sample should be taken from VP-1 and then both VP-1 and VP-2 can be decommissioned. |
Shawn Tisdell |
| 10/4/2016 |
Meeting or Teleconference Held |
Met with adjacent property owner impacted by groundwater contamination from the site to discuss property access to sample wells on their property. |
Shawn Tisdell |
| 10/6/2016 |
Meeting or Teleconference Held |
Meeting with RP and consultant on multiple Chevron sites to discuss current site status and upcoming site action. |
Shawn Tisdell |
| 1/13/2017 |
Update or Other Action |
Letter sent to neighboring landowner requesting property access for additional sampling at wells associated with this site. |
Shawn Tisdell |
| 9/27/2017 |
Potentially Responsible Party/State Interest Letter |
PRP letter sent to new owner of the site. |
Shawn Tisdell |
| 3/12/2018 |
Update or Other Action |
DEC reviewed 2017 Annual Groundwater Monitoring Report. Sampling results indicate that cleanup level (CUL) exceedances were observed in MW-2 (naphthalene) and MW10 (ethylbenzene) located on the 1501 S Cushman property and in MW-14R which is Northwest of the property. The consultant recommends another round of groundwater monitoring for 2018, targeting wells MW-2, MW-5, MW-9 and MW-14R for naphthalene analysis. A meeting has been requested by the DEC to discuss site characterization for the upcoming 2018 season. |
Shawn Tisdell |
| 3/19/2018 |
Document, Report, or Work plan Review - other |
An updated 2017 Annual Groundwater Monitoring Report has been reviewed and approved. |
Shawn Tisdell |
| 6/12/2018 |
Meeting or Teleconference Held |
Meeting held with RP and consultants to discuss site progress and outline future site action. |
Shawn Tisdell |
| 7/17/2018 |
Risk Assessment Workplan Approved |
Received and reviewed Site Assessment Work Plan Amendment. This report outlined proposed site characterization activities west of the source area on a property to the west of S. Cushman St.
These activities include advancing a soil boring just north of MW-6 to collect soil samples to complete prior characterization activities. In addition, soil vapor samples will be collected from VP-1 which is also located on this property. |
Shawn Tisdell |
| 7/19/2018 |
Site Characterization Workplan Approved |
DEC staff reviewed Site Assessment Work Plan Amendment. The scope for this work plan is to sample soil vapor probe VP-1 at 5 ft. and 8.5 ft. below ground surface (bgs) and collect soil samples near MW-6 at approximately 6 ft. bgs, 10 ft. bgs, and the bottom of the borehole. Both of these sampling locations are on a property located to the west of the former Texaco Property. Work is scheduled for July 23 and 24, 2018. |
Shawn Tisdell |
| 7/23/2018 |
Site Visit |
Conducted site visit to observe soil boring and sampling event near monitoring well MW-6 on neighboring property. Access to this location had been denied in the past. Soil was field screened and analytical samples were collected for GRO, DRO, VOC and PAH analysis. |
Shawn Tisdell |
| 10/10/2018 |
Document, Report, or Work plan Review - other |
DEC received Annual 2018 Groundwater Monitoring Report to review. |
Shawn Tisdell |
| 11/8/2018 |
Meeting or Teleconference Held |
DEC staff met with Chevron and ARCADIS representatives to determine site status and discuss the path forward for multiple sites. Chevron is in the process of transferring site managers from GHD to ARCADIS. |
Shawn Tisdell |
| 12/21/2018 |
Update or Other Action |
Request by the consultant for report submittal extension from December 31, 2018 to January 18, 2019 was approved by the DEC for a Site Assessment report of soil boring advancement and soil vapor sampling. |
Shawn Tisdell |
| 1/2/2019 |
Document, Report, or Work plan Review - other |
Received Site Assessment Report which documents soil, soil gas and groundwater monitoring on a property to the west of the former gas station which had not been sampled for several years. This report is currently under review. |
Shawn Tisdell |
| 5/3/2019 |
Document, Report, or Work plan Review - other |
The DEC has determined that the work plan submitted for this site does not meet the minimum requirements as defined in DEC guidance and has requested that it be revised. |
Shawn Tisdell |
| 8/9/2019 |
Meeting or Teleconference Held |
DEC staff met with Arcadis and Chevron representatives to discuss the current status and upcoming site cleanup goals for this site. |
Shawn Tisdell |
| 12/19/2019 |
Document, Report, or Work plan Review - other |
Received 2019 Annual Groundwater Monitoring Report. MW-9,located off site property to the north was covered by a temporary garage and not sampled. MW-14R, located northwest of the site property had elevated benzene (0.05 mg/l) and ethylbenzene (0.018 mg/l). Analytical results from other site monitoring wells are generally consistent with historical data.
|
Shawn Tisdell |
| 1/15/2021 |
Meeting or Teleconference Held |
DEC staff met with Chevron Environmental Management Company (CEMC) and Arcadis to discuss Chevron sites located in Alaska during the Annual Portfolio Meeting on January 14th and 15th, 2021. |
Rebekah Reams |
| 6/25/2021 |
Document, Report, or Work plan Review - other |
DEC provided comments on the Site Groundwater Monitoring Work Plan, which proposes to establish annual groundwater sampling of site monitoring wells MW-2, MW-5, MW-6, MW-9, MW-10, MW-11, and MW-14R. |
Rebekah Reams |
| 3/18/2022 |
Document, Report, or Work plan Review - other |
2021 Annual Groundwater Monitoring event was conducted on July 16, 2021. Groundwater samples were collected from monitoring wells MW-2, MW-5, MW-6, MW-10, MW-11 and MW-14R. Monitoring well MW-9 contained ice at 3.80 feet below top of casing and was unable to be gauged or sampled. Samples were submitted to the laboratory for DRO, GRO, and VOCs analysis. Groundwater flow direction was to the north-northwest and depth to groundwater was 12.92 to 14.82 feet below ground surface. |
Rebekah Reams |
| 4/5/2022 |
Document, Report, or Work plan Review - other |
DEC approved the Well Amendment Work Plan dated March 8, 2022 with the condition that EPA's Underground Injection Control (UIC) Program approves of the proposed work. This document outlined plans to address current on- and off-site hydrocarbon concentrations through the application of Cool-Ox™ in monitoring wells MW-5, MW-6, MW-9, and MW-14R. |
Rebekah Reams |
| 5/23/2022 |
Document, Report, or Work plan Review - other |
DEC provided comments on the Conceptual Site Model which summarizes the site history, evaluates potential exposure pathways, recommends additional work to be completed at the site and proposes to establish annual groundwater sampling of site monitoring wells MW-2, MW-5, MW-6, MW-9, MW-10, MW-11, and MW-14R. |
Rebekah Reams |
| 8/29/2022 |
Update or Other Action |
DEC approved condensing the project timeline for Cool-Ox injections described in the work plan approved on April 5, 2022 from 30 days to 15 days between applications due to delays caused by shipping issues. |
Rebekah Reams |
| 9/29/2022 |
Document, Report, or Work plan Review - other |
ADEC provided comments on the Treatment of Purge Water Utilizing Granular Activated Carbon (GAC) at Chevron Environmental Management Company Sites which includes standard operating procedures and breakthrough estimates proposed for use at this site. |
Rebekah Reams |
| 11/8/2022 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved transport of 300 gallons of water generated on September 24, 2022. |
Rebekah Reams |
| 4/5/2023 |
Long Term Monitoring Workplan or Report Review |
2022 Annual Groundwater Monitoring event was conducted on July 11, 2022. Groundwater samples were collected from monitoring wells MW-2, MW-5, MW-6, MW-9, MW-10, MW-11 and MW-14R. Samples were submitted to the laboratory for DRO, GRO, VOCs, and lead analysis. Groundwater flow direction was to the northwest and depth to groundwater was 11.68 to 13.82 feet below ground surface. DRO (3.68 mg/L), GRO (2.81 mg/L), 1,2,4-trimethylbenzene (0.233 mg/L), and 1,3,5-trimethylbenzene (0.159 mg/L) exceeded cleanup levels at MW-5. |
Rebekah Reams |
| 4/12/2023 |
Long Term Monitoring Workplan or Report Review |
ADEC approved the Groundwater Sampling Analyte Reduction Request - Groundwater Sampling Work Plan Addendum following comment resolution. This document proposes to increase the sampling frequency from annual to semi-annual and to update the sampling plan to include GRO, DRO, BTEX, lead, naphthalene, 1,2,4-trimethylbenzene (TMB), 1,3,5-TMB, 1,2,3-trichloropropane (1,2,3-TCP) and 1,1,2-trichloroethane (1,1,2-TCE) at monitoring wells MW-2, MW-5, MW-6, MW-9, MW-10, MW-11, and MW-14R. Groundwater monitoring is tentatively scheduled to occur in June and October. |
Rebekah Reams |
| 12/29/2023 |
Long Term Monitoring Workplan or Report Review |
2023 First Semi-Annual Groundwater Monitoring event was conducted on June 6, 2023. Groundwater samples were collected from monitoring wells MW-5, MW-6, MW-10, MW-11 and MW-14R. MW-2 and MW-9 had ice blocking the well casing and could not be sampled. Groundwater flow direction was to the north and depth to groundwater was 11.74 to 13.61 feet below ground surface. Benzene (9.97 ug/L) exceeded cleanup levels at offsite well MW-14R. All other results were below cleanup levels. |
Rebekah Reams |
| 12/29/2023 |
Long Term Monitoring Workplan or Report Review |
2023 Second Semi-Annual Groundwater Monitoring event was conducted on September 22, 2023. Groundwater samples were collected from monitoring wells MW-2, MW-5, MW-6, MW-9, MW-10, MW-11 and MW-14R. Groundwater flow direction was to the north and depth to groundwater was 11.59 to 13.66 feet below ground surface. Benzene (18.1 ug/L) exceeded cleanup levels at offsite well MW-14R, Naphthalene (2.33 ug/L) and 1,2,4-trimethylbenzene (174 ug/L) exceeded cleanup levels at offside well MW-9, and 1,3,5-trimethylbenzene exceeded cleanup levels at onsite well MW-5. |
Rebekah Reams |
| 12/29/2023 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 77820 Former USTs. |
Rebekah Reams |
| 1/11/2024 |
Offsite Soil or Groundwater Disposal Approved |
DEC reviewed the 2023 Remedial Implementation Report which documents Cool-Ox injection and monitoring activities that were completed to enhance dissolved phase petroleum hydrocarbon degradation. Cool-Ox was gravity-fed into MW-5, MW-6, and MW-14R during the 2023 injection events, injections could not be completed at MW-9 due to ice buildup in the well. The report concluded that based on initial groundwater monitoring results the amendments have not been effective in reducing COC concentrations in groundwater, but that groundwater data from 2024 monitoring events will be used to further evaluate the effectiveness of the injections and determine if additional events are warranted. |
Rebekah Reams |
| 9/10/2024 |
Long Term Monitoring Workplan or Report Review |
2024 First Semi-Annual Groundwater Monitoring event was conducted on June 2, 2024. Groundwater samples were collected from monitoring wells MW-2, MW-5, MW-6, MW-9, MW-10, MW-11 and MW-14R. Monitoring wells MW-2 and MW-5 were frozen and were not gauged and sampled. Monitoring well MW-9 was frozen and was not sampled. Groundwater flow direction was to the north-northwest and depth to groundwater was 13.02 to 15.21 feet below ground surface. Benzene (77.4 ug/L) exceeded cleanup levels at offsite well MW-14R during this sampling event. |
Rebekah Reams |
| 9/25/2024 |
Meeting or Teleconference Held |
ADEC staff met with Chevron and their consultant for an annual portfolio meeting to discuss site status, upcoming document submittals, pending reviews, and general updates for Chevron's contaminated sites throughout the state. |
Rebekah Reams |
