| Action Date |
Action |
Description |
DEC Staff |
| 4/1/1989 |
Update or Other Action |
(Old R:Base Action Code = SA1 - Phase I Site Assessment (General)). DOT contracted Shannon and Wilson, Inc. to investigate past uses and potential hazards at the site as part of a right-of-way road project. Shannon and Wilson, Inc. report, "Preliminary Hazardous Waste Site Evaluation, Proposed Minnie Street Connector, Fairbanks, Alaska" identified data gaps concerning management of DOT's vehicle and equipment maintenance program which was located at the site. |
Former Staff |
| 12/1/1990 |
Site Characterization Report Approved |
(Old R:Base Action Code = SI - Site Investigation). DOT contracted Shannon and Wilson, Inc. to investigate parcel of site needed for proposed right-of-way. Their report, "Final Report: Illinois Street and Minnie Street Connector Hazardous Waste Field Investigation, Phase II" dated 12/90 reports that 3 of 6 soil samples from groundwater monitoring well and soil boring had low levels of chlorobenzene; 0.07 - 0.16 ppm. 2 water samples from separate groundwater monitoring wells had levels of 1,2-dichyloroethane, PCE, TCE and BTEX above MCLs. 2 surface soil samples had high levels of TPH (1610 ppm and 310 ppm). A sheen was observed on the water samples and an odor was noted from the monitoring wells. Staining evident in the upper 2 feet of the soil borings. |
Former Staff |
| 12/17/1990 |
Site Added to Database |
Hydrocarbon and solvent contamination found in soil and groundwater. |
Former Staff |
| 4/29/1991 |
Update or Other Action |
(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Preliminary cleanup alternatives and cost estimates for remediation of the Minnie Street Connector Project submitted to Alaska DOT April, 1991 by Shannon and Wilson. Estimates based on many assumptions and recognizes that information concerning extent of contamination is limited. Proposes floating product recovery, soil remediation, and groundwater remediation over 11 year period at a cost of $10,207,000. Recommends additional sampling for mercury. |
Former Staff |
| 5/1/1991 |
Site Ranked Using the AHRM |
Initial ranking. |
Former Staff |
| 1/8/1992 |
Update or Other Action |
(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Remedial action plan submitted and reviewed, response letter returned. |
Former Staff |
| 6/24/1992 |
Update or Other Action |
(Old R:Base Action Code = RPL2 - Site Information Request Letter). ADEC sent PRP-CS Database Notification Letter to PRP requesting update and additional environmental information concerning the contaminated site. As of this "complete date" no response has been received. |
Jeff Peterson |
| 12/18/1992 |
Update or Other Action |
(Old R:Base Action Code = CORR - Correspondence (General)). Notified by letter, party of ADEC's intent to use Response Fund monies to initiate a comprehensive area-wide Phase I site Assessment of the Illinois-Minnie Site. Asks to submit questions and comments. |
Ben Thomas |
| 12/28/1992 |
Cleanup Assumed by ADEC |
(Old R:Base Action Code = SLC - Site Lead Cleanup). Correspondence returned to ARRC thanking for comments. Will incorporate into ADEC final version. will keep ARRC and all parties updated on future actions. |
Ben Thomas |
| 12/28/1992 |
Update or Other Action |
(Old R:Base Action Code = CORR - Correspondence (General)). (OSLP) ARRC submitted comments and preferred Site Assessment plan for Illinois-Minnie Site. This Project was first proposed in 1990. |
Ben Thomas |
| 1/19/1993 |
Meeting or Teleconference Held |
Met with Jim Weymiller to discuss proposed workplan for Illinois-Minnie site. Was concerned about cost recovery, scope, intent, timeframe. Has performed additional work and will submit reports to ADEC for our review. |
Ben Thomas |
| 1/31/1995 |
Update or Other Action |
SITE SUMMARY: Ground water impact known, but cleanup delayed pending the outcome of MSLUG efforts. ADEC notified operator of draft COBC to guide cleanup in 1995. |
Cindy Thomas |
| 7/10/2002 |
GIS Position Updated |
Plotted latitude and longitude coordinates and found them to be acceptable for associated property or address. |
Heather Goldman |
| 7/15/2002 |
Site Number Identifier Changed |
Changed Workplan from 01 to 09 to reflect presence of a hazardous substance above cleanup levels. |
Former Staff |
| 9/13/2002 |
Site Characterization Workplan Approved |
At UNOCAL's request, GeoEngineers submitted workplan for site investigation with respect to former UNOCAL tank farm. Field work will include soil and groundwater sampling for petroleum and halogenated compounds. |
Janice Wiegers |
| 3/11/2003 |
Update or Other Action |
Reviewed subsurface site investigation. Detected BTEX, GRO, DRO, 1 2 DCA and Jet Fuel. |
Torsten Ernst |
| 7/23/2003 |
GIS Position Updated |
64 50 58.94540 -147 43 24.22920 |
Torsten Ernst |
| 8/20/2003 |
Proposed Plan |
Reviewed work plan in which drilling three new wells to approximately 20 feet bgl was proposed. |
Torsten Ernst |
| 8/28/2003 |
Update or Other Action |
Approved soil transport of cuttings to OIT for treatment. |
Janice Wiegers |
| 7/30/2004 |
Update or Other Action |
Reviewed July 15th monitoring report. Performed chromatagraphic, EPH, and VPH analysis. Found free product consistent with Jet-A fuel. Highest concentrations of most contaminants were found in GEI-2. |
Torsten Ernst |
| 3/17/2005 |
Meeting or Teleconference Held |
Met with representatives from ChevronTexaco, Unocal, and the railroad regarding cooridinated sampling and ADEC's areawide requirements for future work. Work plan for off-site investigation and CSM development required by May 30, 2005. |
Janice Wiegers |
| 5/23/2005 |
Update or Other Action |
Groundwater monitoring report submitted for April 2005 monitoring event. Conditions similar to previous events. Product found in GEI-8 for first time. |
Janice Wiegers |
| 6/20/2005 |
Proposed Plan |
Approved work plan for off-site investigation and CSM development. |
Janice Wiegers |
| 6/23/2005 |
GIS Position Updated |
Slightly modified coordinates to reflect more accurate position. Using NAD1983 for datum. |
Torsten Ernst |
| 12/7/2005 |
Update or Other Action |
ADEC received the Results for Groundwater Monitoring at the Former Unocal Bulk Plant - Dated December 1, 2005. In general, BETX, GRO, and DRO concentrations detected during the Oct. 2005 sampling were similar to levels detected during the September 2004 monitoring. Benzene was detected in 12 wells at concentrations ranging from 0.728 ug/L to 8,060 ug/L (GEI-12). DRO was detected in all the wells sampled, except MW-2, at concentrations ranging from 0.421 mg/L in K-7 to 98.7 mg/L in GEI-7. EDB was detected in the groundwater sample from well GEI-2 at a concentration of 0.156 mg/L. |
Deborah Williams |
| 1/12/2006 |
Update or Other Action |
ADEC received a report entitled "Off-site Delineation Former Unocal Bulk Plant" dated January 5, 2006. During the well search they identified a public water system within approximately 1/4 mile from the site. They also identified approximately 138 wells from the National Water Information System (NWIS) and the Well Log Tracking System (WELTS).
Three soil borings were drilled and sampled, and groundwater monitoring wells were installed in the borings. Soil conditions in the new wells along the southern property line are similar to the rest of the site. Contamination in the soil varies between the new well locations from being isolated from the groundwater interface in GEI-10 and GEI-11, to spanning the soil column from the ground surface to groundwater in GEI-12. DRO was the primary contaminant encountered in the new wells, however, the groundwater interface sample from GEI-11 also had high concentrations of GRO/BTEX constituents. RRO was not detected in any of the soil samples. |
Deborah Williams |
| 1/12/2006 |
Update or Other Action |
ADEC received a report entitled "Off-site Delineation Former Unocal Bulk Plant" dated January 5, 2006. During the well search they identified a public water system within approximately 1/4 mile from the site. They also identified approximately 138 wells from the National Water Information System (NWIS) and the Well Log Tracking System (WELTS).
Three soil borings were drilled and sampled, and groundwater monitoring wells were installed in the borings. Soil conditions in the new wells along the southern property line are similar to the rest of the site. Contamination in the soil varies between the new well locations from being isolated from the groundwater interface in GEI-10 and GEI-11, to spanning the soil column from the ground surface to groundwater in GEI-12. DRO was the primary contaminant encountered in the new wells, however, the groundwater interface sample from GEI-11 also had high concentrations of GRO/BTEX constituents. RRO was not detected in any of the soil samples. |
Deborah Williams |
| 1/9/2008 |
Update or Other Action |
New Chevron Project Manager for this site: Daniel L. Carrier DCarrier@chevron.com |
Tamara Cardona-Marek |
| 1/10/2008 |
Update or Other Action |
DEC received the Second Semi-Annual 2007 Groundwater Monitoring Report from ARCADIS BBL for the former Chevron bulk plant, former texaco bulk plant and former unocal bulk plant. All wells for former Unocal, except MW-13, contained contaminants above DEC cleanup levels. DRO results from Unocal wells showed an increase from the last time they were sampled. Wells GEI2 and GEI7 contained EDB above cleanup levels. GEI 2 also contained lead above cleanup levels. ARCADIS recommends sampling wells GEI 4 , GEI 8, GEI 9, K 7 and MW 4 on an annual basis instead of semi-annual. They also recommend eliminating PAH and volatiles analysis (will continue BTEX). |
Tamara Cardona-Marek |
| 1/10/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Tamara Cardona-Marek |
| 1/31/2008 |
Update or Other Action |
DEC received the 2007 Site Assessment Report for the Former Chevron Bulk Plant, Former Texaco Bulk Plant, and Former Unocal Bulk Plant. Soil samples and vapor probe gas samples were collected at the site. Vapor probe gas samples exceeded screening levels for ethylbenzene, benzene and toluene at depths of 5 and 8.5 feet. From six soil samples collected on the property, four exceeded cleanup levels for DRO's. ARCADIS proposes to conduct another vapor sampling event in 2008. |
Tamara Cardona-Marek |
| 2/1/2008 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed. |
Tamara Cardona-Marek |
| 3/18/2008 |
Update or Other Action |
Sent e-mail to ARR (Susan Schrader and Karen Morrissey) requesting a meeting to discuss IC's for the FAIR area. |
Tamara Cardona-Marek |
| 5/21/2008 |
Institutional Control Record Established |
Recommendations established. |
Tamara Cardona-Marek |
| 6/24/2008 |
Update or Other Action |
ADEC received the Work Plan for Additional Site Assessment. Work Plan includes installation of 4 vapor probes to sample soil gas near buildings. ADEC recommends the addition of 4 vapor probes to the plan (2 per building) and the analysis of additional volatile petroleum components from the vapor samples collected. |
Tamara Cardona-Marek |
| 7/11/2008 |
Meeting or Teleconference Held |
Met with Dan Carrier (Chevron) and Greg Montgomery (Arcadis) to discuss current activities at the site and plans to do additional assessment. ADEC recommended doing vapor probes on two sides of the buildings on site to assess the potential for vapor intrusion. Additional plume delineation to the west was discussed since the boundary of the plume has not been determined. |
Tamara Cardona-Marek |
| 8/29/2008 |
Update or Other Action |
Received and reviewed the First Semi-annual 2008 Groundwater Monitoring Report for Former Chevron, Texaco and Unocal bulk plants. Results are consistent with previous results. ARCADIS recommends eliminating PAH's analysis and VOC's. ADEC agrees but requires analysis for PCE/TCE. ADEC also agrees with wells GEI-8, GEI-9, K-7 and MW-2 to be sampled annually instead of semi-annually. |
Tamara Cardona-Marek |
| 8/29/2008 |
Update or Other Action |
ARCADIS requests approval to transport waste soil resulting from installation of vapor probes. Transport approved although not necessary, all super-sack sample results were below cleanup levels. |
Tamara Cardona-Marek |
| 12/18/2008 |
Update or Other Action |
ADEC received the Second Semi-annual 2008 Groundwater Monitoring Report for Former Chevron, Texaco and Unocal bulk plants. Results are consistent with previous monitoring events. 0.67 Ft of product were measured in well GEI-1. Benzene concentrations measured up to 5,530 ppb. |
Tamara Cardona-Marek |
| 3/13/2009 |
Meeting or Teleconference Held |
ADEC discussed site with Arcadis and Chevron on 3/3/2009. ADEC requested that only one sampling event takes place this year and efforts are focused on developing graphs and plume maps that demonstrate contaminant reduction over time. MNA parameters should also be measured at the site during sampling events. Arcadis will do a Phase I assessment to determine if additional plume delineation to the west is needed. |
Tamara Cardona-Marek |
| 1/22/2010 |
Document, Report, or Work plan Review - other |
DEC reviewed the Annual 2009 Groundwater Monitoring and MNA Report. Well GEI-1 was not sampled due to the presence of LNAPL. Contaminant concentrations in MW-2 increased significantly from previous sampling events. DRO in GEI-4 also increased by an order of magnitude. Well GEI-11 was not sampled due to access issues that need to be resolved with ARRC. |
Tamara Cardona-Marek |
| 2/17/2010 |
Meeting or Teleconference Held |
DEC met with Chevron and Arcadis to discuss 2010 activities. Additional plume delineation to the West of the property will be performed. The completion of a risk assessment is being evaluated and a plan will be submitted in 2010.
Arcadis will perform a pilot-test for the use of surfactants to reduce free product presence. A workplan will be submitted for this work. |
Tamara Cardona-Marek |
| 8/20/2010 |
Document, Report, or Work plan Review - other |
Arcadis submitted work plan for pilot test to inject surfactant to recover free product in one of the wells.
Work plan also included additonal wells for delineation of contamination. Both sections of the work plan have been approved. |
Tamara Cardona-Marek |
| 7/20/2011 |
Document, Report, or Work plan Review - other |
Arcadis submitted a work plan for additional site characterization . Work plan includes the installation of 12 soil borings on the Unocal property for screening and sampling at shallow and deep depths. |
Tamara Cardona-Marek |
| 7/22/2011 |
Site Characterization Workplan Approved |
DEC approved the submitted work plan and clarifications for additional site characterization. |
Tamara Cardona-Marek |
| 3/19/2012 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 71712 former tank and spills. |
Tamara Cardona-Marek |
| 7/30/2012 |
Document, Report, or Work plan Review - other |
DEC received and reviewed the 2012 Groundwater Monitoring Workplan submitted by Arcadis. 21 wells will be sampled annually. For monitoring purposes wells will be sampled will bailers. |
Tamara Cardona-Marek |
| 8/28/2012 |
Meeting or Teleconference Held |
DEC met with Chevron and Arcadis to discuss actions for 2012-2013. An updated conceptual site model will be submitted that addresses exposure pathways and how they will be remediated or controlled. This will comprise the cleanup plan that is expected to be submitted in the Fall of 2012.
Additional assessment will be completed near the surface soil contamination identified on the property. |
Tamara Cardona-Marek |
| 4/29/2013 |
Meeting or Teleconference Held |
DEC met with Chevron and Arcadis to discuss the status of this and other sites. Shallow soil assessments indicate that contamination remains above cleanup levels in surface and sub-surface soils in several areas. Results of LNAPL fingerprinting indicate that product to the west (downgradient) does not match the product at the UNOCAL source area, however other potential sources have not been determined. Arcadis has indicated that air sparging is one likely remedial option that will be proposed at the site, however there is concern from Chevron that this will not take care of the DRO and they do not want to repeat cleanup efforts. Access of the property to the south should be granted this year. Additional delineation of the downgradient plume may be needed to the west; although wells exist to the south of this area, the there are no wells directly downgradient of groundwater contamination. |
Robert Burgess |
| 5/14/2014 |
Meeting or Teleconference Held |
DEC met with Chevron and ARCADIS to discuss several Fairbanks-area sites. Chevron plans to install a remedial system consisting of air sparging and soil vapor extraction, and to remove the top two feet of contaminated soil in all accessible areas. DEC has approved the re-use of a system currently located at a different site (former Mike's Chevron) which no longer requires the system. |
Robert Burgess |
| 9/16/2014 |
Cleanup Plan Approved |
After comment and revision, DEC approved the 2014 Remedial Design and Workplan for the site. Surface soils will be removed to a depth of 2 feet to the extent practicable, and an air sparge/soil vapor extraction (AS/SVE) system will be installed and operated seasonally. The AS/SVE system is designed to target lighter range petroleum compounds such as GRO and BTEX. Existing DRO will not be removed by the system and will be managed with institutional controls. |
Robert Burgess |
| 9/25/2014 |
Site Visit |
DEC project manager visited the site to observe utility clearance trenching with a vactor truck and excavation work being conducted at the site. |
Robert Burgess |
| 10/2/2014 |
Site Visit |
DEC project manager visited the site to observe installation of air sparge wells and to talk with Chevron and ARCADIS project managers. |
Robert Burgess |
| 6/23/2016 |
Document, Report, or Work plan Review - other |
DEC recommended Chevron dispose of the soil stockpile by September, 2016. The stockpile was generated during excavation and system installation work conducted in September, 2014. |
Robert Burgess |
| 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 |
| 5/22/2017 |
Document, Report, or Work plan Review - other |
A work plan for installing a wicking adaptor was reviewed and approved. The work plan outlines the installation of a wicking adapter into four soil vapor extraction wells to enhance the extraction of light non-aqueous phase liquid (LNAPL). These wells were selected based on the historic LNAPL trends. Installation of the wicking adapter is scheduled sometime between the end of May and the month of June. A photoionization detector will be used to monitor the performance of the adaptor at the site and analytical samples will be collected during the monthly operation and maintenance events. The contaminated wicking material will be collected monthly and prior to system winterization. |
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 |
| 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 |
| 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 |
| 6/10/2019 |
Update or Other Action |
Approval was provided to remove hydrocarbon wicking adaptors from wells GEI-1, GEI-2, GEI-7 and GEI-11, since LNAPL was not encountered. New wicking adaptors will be redeployed if there is LNAPL rebound that could be recovered by the adaptors. |
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 |
| 9/27/2019 |
Document, Report, or Work plan Review - other |
Received First & Second Quarter 2019 Remediation System Operations and Maintenance Report. As of June 19, 2019 this air sparge and soil vapor extraction system has been operating for 10,788 hours, resulting in an estimated 6,089lbs of contaminated mass removal. |
Shawn Tisdell |
| 1/6/2020 |
Document, Report, or Work plan Review - other |
2019 Second Semi-Annual Groundwater Monitoring event was conducted on October 16th and 17th, 2019. Groundwater samples were collected from monitoring wells GEI-3, GEI-4, GEI-6, GEI-8, GEI-9, GEI-12, K-5, K-7, MW-1, MW-2, MW-3, MW-4, MW-6, MW-13, MW-14 and MW-15. Wells GEI-2 and GEI-11 were not sampled due to heat traces present in the wells. GEI-10 and MW-5 were inaccessible, and GEI-1 and GEI-7 were obstructed and unable to be sampled. Samples were submitted to the laboratory for BTEX, EDC, GRO, DRO, RRO analysis. Groundwater flow direction was to the southwest and depth to groundwater was 11.94 to 17.71 feet below ground surface. |
Rebekah Reams |
| 3/5/2020 |
Document, Report, or Work plan Review - other |
DEC received Site Groundwater Monitoring Work Plan |
Rebekah Reams |
| 4/24/2020 |
Document, Report, or Work plan Review - other |
DEC provided comments for the 2019 First Semi-Annual Groundwater Monitoring Report submitted December 31, 2019 and the Site Groundwater Monitoring Work Plan submitted March 5, 2020. |
Rebekah Reams |
| 8/17/2020 |
Document, Report, or Work plan Review - other |
2020 First Semi-Annual Groundwater Monitoring event was conducted on June 10th through 12th, 2020. Groundwater samples were collected from monitoring wells GEI-1 through GEI-5, GEI-8, GEI-9, GEI-11, K-5, K-7, MW-1, MW-3, MW-6, MW-14 and MW-15. Monitoring well MW-5 was obstructed by piping for nearby construction, GEI-6 well casing was obstructed by ice and contained insufficient water to sample, GEI-9 well casing obstructed by ice at 6.53 feet below top of casing, GEI-7 was obstructed and could not be gauged or sampled, GEI-10 was buried under gravel and could not be located, and GEI-12 was not sampled due to the presence LNAPL globules. Samples were submitted to the laboratory for BTEX, MTBE, EDC, GRO, DRO, and RRO analysis. Groundwater flow direction was to the west-southwest and depth to groundwater was 11.28 to 16.96 feet below ground surface. |
Rebekah Reams |
| 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 |
| 1/19/2021 |
Document, Report, or Work plan Review - other |
2020 Second Semi-Annual Groundwater Monitoring event was conducted on November 4th and 5th, 2020. Groundwater samples were collected from monitoring wells GEI-4, GEI-8, MW-1, MW-2, MW-3, and MW-15. Monitoring wells GEI-1, GEI-2, GEI-7, and GEI-12 were obstructed by ice, monitoring wells GEI-3, GEI-5, GEI-6, GEI-9, GEI-10, GEI-11, MW-4, MW-5, MW-6, MW-13, and MW-14 wells were unable to be located due to snow, and monitoring wells K-5 and K-7 could not be sampled due to subzero temperatures and the water in sampling tubing freezing. Samples were submitted to the laboratory for BTEX, EDC, GRO, DRO, and RRO analysis. Groundwater flow direction was to the west-southwest and depth to groundwater was 13.18 to 15.92 feet below ground surface. |
Rebekah Reams |
| 8/31/2021 |
Document, Report, or Work plan Review - other |
2021 First Semi-Annual Groundwater Monitoring event was conducted on June 13th and 14th, 2021. Groundwater samples were collected from monitoring wells GEI-1, GEI-2, GEI-8, GEI-12, MW-1, MW-2, MW-3, MW-13, K-5 and K-7. Monitoring well GEI-7 was obstructed by ice, monitoring wells GEI-5, GEI-6, GEI-9, GEI-10, MW-5 and MW-15 could not be located, GEI-3, MW-6 and MW-14 were not accessible due to debris over wells, MW-4 could not be accessed due to a locked gate, and GEI-11 could not be sampled due to heat trace. Samples were submitted to the laboratory for VOCs, GRO, DRO, and RRO analysis. Groundwater flow direction was to the west-southwest and depth to groundwater was 12.31 to 15.77 feet below ground surface. |
Rebekah Reams |
| 2/16/2022 |
Document, Report, or Work plan Review - other |
DEC provided correspondence requesting that the Human Health Conceptual Site Model Summary Report for this site be revised to address several errors that were identified in the first draft of the report. |
Rebekah Reams |
| 8/17/2022 |
Document, Report, or Work plan Review - other |
2022 First Semi-Annual Groundwater Monitoring event was conducted on June 14th and 15th, 2022. Groundwater samples were collected from monitoring wells GEI-4, GEI-8, GEI-12, MW-1, MW-3, MW-6, MW-13, MW-15, K-5, and K-7. Monitoring wells GEI-3, GEI-6, GEI-9, GEI-10, and MW-5 could not be located. Well GEI-5 was compromised. Well GEI-7 is obstructed at 8.5 feet below top of casing. MW-2 and MW-14 were frozen. Well MW-4 was inaccessible due to a locked gate. Could not sample wells GEI-2 and GEI-11 due to sample pump malfunction. Well GEI-1 had insufficient water to sample. Samples were submitted to the laboratory for VOCs, GRO, DRO, and RRO analysis. Groundwater flow direction was to the west and depth to groundwater was 11.75 to 16.88 feet below ground surface. |
Rebekah Reams |
| 9/7/2022 |
Document, Report, or Work plan Review - other |
DEC approved the Soil Investigation Work Plan following comment resolution. This document outlines plans to advance six soil borings to a depth of 30 feet below ground surface near former sample locations SB-7b, SB-8b, SB-9b, SB-14b, SB-15b, and SB-18b. |
Rebekah Reams |
| 9/21/2022 |
Site Visit |
CS project manager visited the site with Chevron personnel during soil investigation work |
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 one 55-gallon drum of water and one 55-gallon drum of soil generated during site characterization work on 10/20/2022. |
Rebekah Reams |
| 6/2/2023 |
Long Term Monitoring Workplan or Report Review |
ADEC provided comments on the Groundwater Analyte Adjustment Request and Well Repair Work Plan which proposes to repair or replace damaged monitoring wells GEI-1, GEI-5, GEI-6, GEI-7, and GEI-10 and update the analytes included in the sampling plan. |
Rebekah Reams |
| 6/2/2023 |
Document, Report, or Work plan Review - other |
DEC received the 2022 Remediation System Operation & Maintenance Report. In 2022, the AS/SVE system was operational for 70% of the reporting period from May 24 to October 11, 2022 and mass removal was approximately 17.8 pounds. The total number of hours of operation since the initial system startup on April 15, 2016 is 18,770 hours and total mass removed is approximately 8,076 pounds. |
Rebekah Reams |
| 6/27/2023 |
Document, Report, or Work plan Review - other |
2022 Second Semi-Annual Groundwater Monitoring event was conducted on October 1st through 4th, 2022. Groundwater samples were collected from monitoring wells GEI-1 to GEI-4, GEI-8, GEI-9, GEI-11, GEI-12, MW-1 to MW-6, MW-13 to MW-15, K-5, and K-7. Wells GEI-6 and GEI-10 could not be located, GEI-7 was obstructed and could not be gauged or sampled, and GEI-5 was compromised and no sample was collected. Samples were submitted to the laboratory for VOCs, GRO, DRO, and RRO analysis. Groundwater flow direction was to the west-northwest and depth to groundwater was 13.05 to 18.36 feet below ground surface. |
Rebekah Reams |
| 9/15/2023 |
Document, Report, or Work plan Review - other |
2023 First Semi-Annual Groundwater Monitoring event was conducted on June 9th and 10th, 2023. Groundwater samples were collected from monitoring wells GEI-2 to GEI-4, GEI-8, GEI-9, GEI-11, GEI-12, MW-1, MW-3, MW-4, MW-6, MW-13 to MW-15, K-5, and K-7. Monitoring well GEI-1 had insufficient water to sample. GEI-6, MW-2, and MW-5 was obstructed by ice and could not be sampled. GEI-7 was obstructed and was not sampled. GEI-10 was not located and was not sampled. Samples were submitted to the laboratory for VOCs, GRO, DRO, and RRO analysis. Groundwater flow direction was to the west-northwest and depth to groundwater was 12.11 to 17.14 feet below ground surface. |
Rebekah Reams |
| 10/17/2023 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved offsite transport of 165 gallons of purge water and decontamination water |
Rebekah Reams |
| 1/10/2024 |
Long Term Monitoring Workplan or Report Review |
2023 Second Semi-Annual Groundwater Monitoring event was conducted on October 3rd and 4th, 2023. Groundwater samples were collected from monitoring wells GEI-1 to GEI-6, GEI-7R, GEI-8 to GEI-12, MW-1 to MW-6, MW-13 to MW-15, K-5, and K-7. Monitoring well MW-15 was not sampled as the pump intake clogged repeatedly during purging. GEI-7 has been replaced with GEI-7R. Samples were submitted to the laboratory for VOCs, GRO, DRO, RRO, lead, and select PAHs analysis. Groundwater flow direction was to the west and depth to groundwater was 12.22 to 18.05 feet below ground surface. |
Rebekah Reams |
| 2/7/2024 |
Document, Report, or Work plan Review - other |
DEC reviewed the Well Decommissioning and Installation Report – 2023 which documents the repair and redevelopment of monitoring wells GEI-1, GEI-5, GEI-6, and GEI-10 as well as the decommissioning of monitoring well GEI-7 and installation of the replacement well GEI-7R in July and August 2023. Groundwater samples were analyzed for GRO, DRO, RRO, VOCs, EDB, PAHs, and total lead. All site wells were surveyed on 9/29/2023.
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Rebekah Reams |
| 2/13/2024 |
Document, Report, or Work plan Review - other |
DEC approved the 2023 Offsite Delineation Work Plan following comment resolution. This work plan proposes to advance four soil borings (SB-31 through SB-34) and collocated monitoring wells (MW-16 through MW-19) to define the extent of contamination downgradient of monitoring well MW-7. |
Rebekah Reams |
| 7/29/2024 |
Long Term Monitoring Workplan or Report Review |
DEC reviewed the 2023 Remediation System Operation & Maintenance Report. In 2023, the AS/SVE system was operational for 62% of the reporting period from May 24 to November 2, 2023 and mass removal was approximately 382.8 pounds. The total number of hours of operation since the initial system startup on April 15, 2016 is 21,443 hours and total mass removed is approximately 8,459 pounds. |
Rebekah Reams |
| 7/29/2024 |
Long Term Monitoring Workplan or Report Review |
DEC reviewed the 2023 Remediation System Operation & Maintenance Report. In 2023, the AS/SVE system was operational for 62% of the reporting period from May 24 to November 2, 2023 and mass removal was approximately 382.8 pounds. The total number of hours of operation since the initial system startup on April 15, 2016 is 21,443 hours and total mass removed is approximately 8,459 pounds. |
Rebekah Reams |
| 7/31/2024 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 71712 former tank and spills. |
Rebekah Reams |
| 8/13/2024 |
Long Term Monitoring Workplan or Report Review |
2024 First Semi-Annual Groundwater Monitoring event was conducted on May 21, 2024. Groundwater samples were collected from monitoring wells GEI-2 to GEI-4, GEI-6, GEI-7R, GEI-8 to GEI-12, MW-1, MW-3, MW-6, MW-13, K-5, and K-7. Monitoring well GEI-1 was inaccessible since a vehicle was parked over the well, MW-4 and MW-14 were also inaccessible due to site access restrictions. GEI-5, MW-2, MW-5, and MW-15 were frozen and not gauged or sampled. Samples were submitted to the laboratory for VOCs, GRO, DRO, RRO, lead, and select PAHs analysis. Groundwater flow direction was to the west-northwest and depth to groundwater was 13.2 to 18.95 feet below ground surface. |
Rebekah Reams |
| 9/9/2024 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved offsite transport of 55 gallons of decontamination and purge water generated in May 2024 |
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 |
| 10/10/2024 |
Offsite Soil or Groundwater Disposal Approved |
ADEC approved transport of 165 gallons of purge water generated during routine monitoring activities in May 2024, a 55-gallon drum of spent GAC, and 55 gallons of soil and 110 gallons of water generated during well installation and monitoring activities conducted in August 2024. |
Rebekah Reams |
