| Action Date |
Action |
Description |
DEC Staff |
| 8/5/1994 |
Site Visit |
RECN; |
Former Staff |
| 8/6/1994 |
Site Visit |
RECN; |
Former Staff |
| 8/8/1994 |
Site Added to Database |
|
Former Staff |
| 8/8/1994 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77805 ADD; |
Former Staff |
| 8/31/1994 |
Underground Storage Tank Site Characterization or Assessment |
SA1R; |
Former Staff |
| 8/31/1994 |
Update or Other Action |
NOR; |
Former Staff |
| 11/17/1994 |
Release Investigation |
RELR; Review Release Investigation and work-to-date. |
Former Staff |
| 11/29/1994 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Review closure site assessment. Review work-to-date. |
Former Staff |
| 12/20/1994 |
Update or Other Action |
CAPR; Suggested changes to Corrective Action Plan. |
Former Staff |
| 12/20/1994 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; Reviewed work to date. |
Former Staff |
| 7/15/1995 |
Leaking Underground Storage Tank Corrective Action Underway |
LCAR; Reviewed quarterly monitoring well reports. No significant changes. |
Former Staff |
| 9/15/1995 |
Update or Other Action |
CAPR; Reviewed files. |
Former Staff |
| 6/17/1996 |
Leaking Underground Storage Tank Corrective Action Underway |
CAPA; Reviewed a stockpile disposal report. |
Former Staff |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: ANCHORAGE NISSAN JEEP/EAGLE |
Former Staff |
| 3/16/2000 |
Update or Other Action |
Letter to Jim Johnson asking for RI/CA work plan by April 15, 2000. Still has elevated levels of benzene, has not delineated extent of soil or gw contamination. Current mw array may not be adequately located to determine site characteristics. Plume almost certainly extends off-property. |
Former Staff |
| 6/5/2000 |
Release Investigation |
Approved 12 May 2000 S&W work plan |
Former Staff |
| 6/5/2000 |
Release Investigation |
Work plan |
Former Staff |
| 9/27/2001 |
Update or Other Action |
Discussed ChemTrack wp with Simon Mawson, calling as representative of ChemTrack. The plan does not address the need for site characterization nor does it provide sufficient detail for CAP review. Proposes liquefying fertilizer and injecting into subsurface - no details of method, monitoring plan, application rate, containment, etc. May need non-domestic plan review. |
Teresa Boston |
| 10/3/2001 |
Update or Other Action |
Letter to Jim Johnson, JH&M Investments @ 4748 Old Seward requesting site characterization by november 30, 2001. |
Former Staff |
| 10/3/2001 |
Update or Other Action |
Met with Chuck Ronan, Sig Jokiel, Jim Frechione and Lynne Bush re this site. |
Former Staff |
| 10/3/2001 |
Update or Other Action |
Informed that Johnson Nissan is bankrupt and no longer operating sales or service operation at 4748 Old SewardHwy. |
Former Staff |
| 10/4/2001 |
Update or Other Action |
Telephone call from Lottie Michael, realtor, of Bonds, Stevens & Johnson, who represents Jim Johnson re the sale of this property. She advised me that Johnson rec'd a faxed copy of the Department's Oct. ltr asking for characterization. |
Former Staff |
| 10/5/2001 |
Update or Other Action |
Meeting with Jim Johnson and Lottie Michael to discuss characterization of site and Johnson's regulatory requirements for investigation and remediation. |
Former Staff |
| 3/14/2002 |
Update or Other Action |
On 3/14/02, Sundet met with Jim Johnson, Darcy Johnson, Lottie Michael and Sig Jokiel and Chuck Ronan of ChemTrack. ChemTrack proposed to inject a surfactant mixture at the site. Sundet reiterated DEC's concerns as noted in its 2/12/02 letter to ChemTrack. Any such plan would need to show control of the injection mixture and adequate monitoring. |
Rich Sundet |
| 4/18/2002 |
Update or Other Action |
CSP followed up the 3/14/02 meeting with a letter to Johnson noting that the site needed to be further characterized to determine the downgradient edge of the plume prior to it and EPA approving of any plan to use surfactants at the site. The letter also noted DEC had no objection to ChemTrack installing two new monitoirng wells (MW 11 and 12) to assist in determining the downgradient extent of the plume as noted during the 3/4 meeting and in ChemTrack's 4/7/02 submittal. |
Rich Sundet |
| 5/22/2002 |
Underground Storage Tank Site Characterization or Assessment |
In an email dated 5/22/02, CSP approved ChemTrack's 5/6/02 dated "Johnson Nissan Facility Sampling and Analysis Plan" that proposed sampling of existing MWs and the two recently installed MWs 11 and 12, surveying the monitoring wells, providing a final report to DEC w/in 60 days, and sampling the onsite drinking well.
On 5/6, DEC also received from ChemTrack its "Monitoring Well Installation &Soil Boring Sampling Interim Status Report" dated 5/6/02 that described how MWs 11 and 12 were installed. |
Rich Sundet |
| 6/26/2002 |
Update or Other Action |
Site transferred to Rich Sundet Former project manager was Lynne Bush. |
Rich Sundet |
| 8/8/2002 |
Update or Other Action |
On 8/8/02, Sundet met with Lotte Michael and Sig Jokiel and Chuck Ronan of Chemtrack with Jonathan Williams of EPA on t/conference. Discussion was regarding ChemTrack's "Analytical Sample Report Groundwater Elevation Data June 2002" received by DEC on 6/28/02, and its "Remediation WorkPlan Revised July 2002" and "Proprietary Surfactant Information July 2002" which were both received by DEC on 7/10/02. DEC expressed concern that contamination decreased in GW significantly between MWs 8 and 11 indicating that there may be a natural or artificial, such as following a utility line, pathway; the agencies verbally approved the plan but there were conditions where the surfactant mixture could be injectioned (I.e, certain wells) to limit migration of contamination. A followup letter would be issued by the agencies regarding the revised remediation plan. |
Rich Sundet |
| 8/12/2002 |
Leaking Underground Storage Tank Corrective Action Underway |
On 8/12/04, DEC and EPA formally approved in writing ChemTrack's "Revised Remediation Plan" that was received by DEC on 7/10/02 with conditions where the surfactant, microbe mixture could be injected (I.e. what MWs), recovery of the mixuture to occur, where and when monitoring would occur, a slug test to occur in MWs 2, 8 and 11, and other conditions. |
Rich Sundet |
| 9/6/2002 |
Update or Other Action |
On 9/6/02, DEC received a brief project update from ChemTrack via an email by that date regarding how much mixture had been injected and how much was recovered and where (I.e., MW) this occurred. |
Rich Sundet |
| 9/30/2002 |
Update or Other Action |
In a submittal dated 9/30/02, ChemTrack provided groundwater data including slug test date, and analytical data for samples collected in June and Sept. 02. |
Rich Sundet |
| 10/9/2002 |
Underground Storage Tank Site Characterization or Assessment |
On 10/9/02, CSP responded to ChemTrack's 10/7/02 "Addendum to Remdiation Workplan Installation of Three Additional Wells and One GeoProbe" that was received by DEC on 10/8/02 via an email. In DEC's response, DEC noted that it had no objection to ChemTrack installing the 3 additional monitoring wells. |
Rich Sundet |
| 12/13/2002 |
Update or Other Action |
On 12/02, Sundet called Sig Jokiel of ChemTrack for an update of the project. Sig informed Sundet that injection may be done for the year and the need to discuss long term monitoring and other needed assessment and cleanup work. Sundet also requested information per condition 8 of the agencies 8/12/02 approval letter that an interim status report is required after the 4th week sampling event. |
Rich Sundet |
| 1/16/2003 |
Update or Other Action |
On 1/16/03, CSP issued a letter to Johnson in followup to its 12/13/02 phone conversation with ChemTrack. It noted that DEC was concerned because it had not yet received a report from ChemTrack as it requested, requested another status report since initiation fo the GW treatement project including a groundwater sampling plan. In addition, DEC noted that even though Johnson may have elected to postpone further injections, recovery of GW cannot be postposed as well because the contamination will/has migrated due to the surfactants. |
Rich Sundet |
| 3/21/2003 |
Document, Report, or Work plan Review - other |
On 3/21/03, CSP provided comments to Johnson regarding ChemTrack's "Johnson Nissan Interim Status Report" dated 2/03 that was received by DEC on 2/23/03, and ChemTracks 2/30/02 "Interim Report" and its 10/7/02 "Addendum to Johnson Nissan Project" report. The reports show that GRO, DRO and benzene continue to be above Table C levels in MW 1,2,6VE, 8 and 14. The agencies provided a number of comments regarding the reports including only some of the required MWs were sampled, recovery in MW 8 occurred but was not approved by the agencies and only approved for recovery in MWs 1, 2 & 6VE to limit the extent of contaminant migration; DRO was not analyzed in MW-8; laboratory analytical data was not included; that the GW sampling plan as proposed was not adequate and the agencies provided further direction what it expected to be performed at the site. |
Rich Sundet |
| 4/9/2003 |
Update or Other Action |
On 4/11/03, CSP received written response from ChemTrack in response to its 3/21/03 letter. |
Rich Sundet |
| 3/5/2004 |
Update or Other Action |
On 3/5/04, CSP received ChemTrack's "Site Closure Report" dated 3/2004. The report requested a NFRAP because groundwater contaminant levels had generally decreased or stabilized. Data showed that at MW-8 benzene had generally decreased from 3.60 mg/L in 6/02 to 0.33 mg/L in 7/03, and stabilized at MW-12 from 0.004 mg/L in 6/02 to 0.237 mg/L in 7/03 to 0.0218 in 1/04; DRO had decreased in MW11 from 3.82 in 6/02 to ND in 1/04. |
Rich Sundet |
| 5/17/2004 |
Update or Other Action |
On 5/17/04, DEC received further information from ChemTrack as requested verbally or through email from CSP as information had not been provided earlier. The information was necessary to evaluate ChemTracks request for a NFRAP status at this site. Information included was in a binder "Johnson Nissan Sample Analytical Data June 2002-January 2004 and included but not limited to laboratory analytical data from sampling efforts by ChemTrack performed on 6/7, 9/16, 10/23, and 11/11/02; 5/6, 5/22, and 7/18/2003; and 1/20/04. |
Rich Sundet |
| 6/9/2004 |
Update or Other Action |
On 6/9/04, DEC received further information from ChemTrack to assist it in evaluating ChemTrack's request for a NFRAP status at this site. Information provided was reports performed earlier in the 1990s by Dowl and Shannon and Wilson. |
Rich Sundet |
| 6/14/2004 |
Conditional Closure Approved |
In a letter dated 6/14/04, DEC issued J.H.M. Investments (Jim Johnson general partner) a conditional NFRAP letter for his contaminated site. Conditions included a deed notice that the property remained contaminated above Table C levels and Method 2 levels; groundwater monitoring needed to be performed including quarterly for the next year; if soil or groundwater in the future is generated from the site above cleanup levels, DEC needs to be notified and approval granted if that waste is transported/treated/disposed off site, and a plan submitted to DEC is excavation is below 2.0 ft. BGS; and, the onsite drinking water well be sampled yearly.
Also that the NFRAP determination does not waive any responsibility by the RP to comply with EPA because the monitoring wells used to inject surfactant solution were considered UIC wells subject to EPA UIC regulations.
A ROD was issued accompanying the NFRAP/IC letter. |
Rich Sundet |
| 6/14/2004 |
Institutional Control Record Established |
An IC was established in the form of a deed notice that this site remained contaminated. The 6/14/04 dated NFRAP requires the RP to record on the property deed no later than July 2004 a "Notice of Environmental Groundwater Contamination" notice that was enclosed with the NFRAP. |
Rich Sundet |
| 9/20/2004 |
Update or Other Action |
On 9/20/04, CSP responded to ChemTrack's "Analytical Sample Report 4748 Old Seward Highway" dated 9/04 that reported groundwater sampling at the site on 8/10/04. The sampling event was required as a condition in the NFRAP/IC and ROD. CSP requested that a long-term groundwater monitoring plan be submitted as the NFRAP requested, and requested a revised reoprt that needs to contain further information as it did not contain information as required in the NFRAP's ROD. |
Rich Sundet |
| 9/22/2004 |
Update or Other Action |
On 9/22/04, Sundet returned Norm Little's call who noted that he now owned the property and that he would file the "Notice of Environmental Contamination" as Chuck Ronan had told him that it was his obligation now that he owned the site. After the conversation, Sundet mailed Little a copy of the NFRAP/IC with the ROD and "Notice…" along with the figures showing the extent of contamination so he can have the "Notice.." recorded. |
Rich Sundet |
| 10/7/2004 |
Update or Other Action |
On 10/7/04, CSP commented on ChemTrack's 10/6/07 dated "Analytical Sampling Report" that included a "Groundwater Monitoring Plan" dated October 2004. In CSP's letter, they conditionally approved of the groundwater plan. |
Rich Sundet |
| 10/12/2004 |
Update or Other Action |
On 10/12/04, Norm Little provided a copy of the 6/14/04 NFRAP/IC, Notice of Environmental Contamination and ROD that was filed with the Recorders Office on 10/12/04. |
Rich Sundet |
| 11/30/2004 |
Update or Other Action |
On 11/30/04, CSP responded to ChemTrack's 10/12/04 submittal that was received on 11/10/04 that provided a response to DEC's 10/7/04 letter. The 11/30/04 letter noted that ChemTrack satisfactorily addressed DEC's 10/7 comments other than the NFRAP letter recorded did not include ChemTrack's Figures 4, 5 and 6 showing the levels and extent of contamination. DEC requested that the 3 figures be recorded as well at the State Recorder's Office by 12/15/04. |
Rich Sundet |
| 12/6/2004 |
Update or Other Action |
On 12/6/2004, Sundet called Norm Little and discussed the State's cost recovery requirements and that bills would be sent to J.H.M. Investments for work through the NFRAP (and some later administrative time) then to Little thereafter. Later, DEC followed-up with a letter to Little informing him of the State's cost recovery obligations. |
Rich Sundet |
| 12/14/2004 |
Update or Other Action |
On 12/14/04, DEC received from Norm Little information showing the the three figures were recorded at the State's Recording Office as requested in its 11/30/04 letter to Little. |
Rich Sundet |
| 5/23/2005 |
Update or Other Action |
File number issued 2100.26.252. FKA L55.192 |
Aggie Blandford |
| 5/23/2005 |
Update or Other Action |
On 5/23/05, DEC informed Norm Little the current property owner that per earlier conversation last week it had not received a reports for the December 2004/January 2005 or the March/April 2005 groundwater sampling events. Based upon this information and information in 2004 that he and Johnson had not met several conditions of the ROD on the required timelines, that DEC was requiring that another year of quarterly groundwater sampling occur: June, September and December 2005 and June 2006. Reports for those events are to be provided to DEC within 60 days of each sampling event. |
Rich Sundet |
| 4/13/2007 |
Update or Other Action |
On 4/13/07, upon review of BGES' reports for their 6 & 8/9 2005, and 6 & 9/2006 quarterly groundwater events, issued a letter to Jim Johnson of H.H.M. Investments requesting a workplan by 5/15/07 for additional groundwater sampling and perform an indoor air instrusion evaluation. DEC's letter noted that the October report shows that concentration levels have decreased since the March 2006 sampling event for several contaminants. In addition, xylene in MW-2, and ethylbenzene in MW B6/VE, and RRO in MW-12 have decreased to below their applicable cleanup levels. While contaminant levels have decreased in those wells, concentration levels have remained above cleanup levels in all monitoring wells sampled (MW-01, MW-02, MW-05, B6VE, MW-08, MW-11, and MW-12). There was an increase in contamination since June 2006 observed in MW-1 for DRO; MW-2 for RRO; B6VE for RRO, GRO and toluene; and, MW-12 for benzene. In addition, the Class C drinking water well showed GRO and all BTEX constituents above 18 AAC 75.345 cleanup levels, including benzene at 0.0108 mg/L, which is also above its 18 AAC 80 drinking water maximum contaminant level of 0.005 mg/L. |
Rich Sundet |
| 4/18/2007 |
Exposure Tracking Model Ranking |
Ranked site with ETM. |
Rich Sundet |
| 4/30/2007 |
Update or Other Action |
On 4/30/07, CSP approved via email a workplan submitted by BGES on behalf of Norm Little to repair monitoring wells on site, and sample the on site drinking water well and existing monitor wells 60 days after the monitor wells were repaired in accordance to the last approved groundwater sampling workplan. CSP had received the BGES workplan via email on 4/27/07. |
Rich Sundet |
| 5/1/2007 |
Update or Other Action |
On 5/1/07, CSP responded to Norm Little's 4/27/07 letter and his consultant BGES's 4/27/07 workplan. DEC approved of BGES's workplan that proposed repairing the monitoring wells, and 60 days after the repair sample the on site drinking water well and existing monitoring wells in accordance to the last approved work plan. CSP also granted Little's request to postpone the indoor air vapor intrusion evaluation and CSP granted this extension to provide a report on this subject until 8/30/07. CSP also requested a CSM when the report for the indoor air vapor evaluation would be submitted. |
Rich Sundet |
| 8/23/2007 |
Update or Other Action |
Followed up verbal approval from 8/22/07 by issuing letter on 8/23/07 to Norm Little granting his request to postpone the groundwater sampling event until 10/15/07. Also extended when Norm is to provide the indoor ar vapor intusion evalution to DEC until 12/2/07. |
Rich Sundet |
| 1/15/2008 |
Update or Other Action |
On 1/15/08, DEC received BGES's report dated December 2007 titled "Groundwater Sampling" for the subject site. The report provided findings from the 9 & 10/07 groundwater sampling event, and CSMs. |
Rich Sundet |
| 4/22/2009 |
Update or Other Action |
LUST site created in CSP database for source area autogenerated source area, 78769 |
Antoine Doiron |
| 6/28/2012 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 78769 name: USTs - two 5,000 gal. USTs |
Katrina Chambon |
| 7/3/2012 |
Document, Report, or Work plan Review - other |
Letter Regarding the Review of BGES, Inc., December 2007 Groundwater Report; Johnson Nissan Facility (Former), 4748 Old Seward Hwy, Anchorage, Alaska, Facility ID #2470. Request Groundwater monitoring event for summer 2012. |
Katrina Chambon |
| 8/29/2012 |
Site Visit |
Site visit conducted to observe groundwater sampling |
Katrina Chambon |
| 8/30/2012 |
Site Visit |
Site visit conducted to observe groundwater sampling |
Katrina Chambon |
| 10/31/2012 |
Site Visit |
On 10/31/12, Sundet visited the site based upon a conversation with Bob Braunstein of BGES in which Bob had noted that it appeared that Six Robblee's purchased the property on 10/9/12 per MOA records. During the site visit, confirmation was made that Six Robblees was now owner/operator of the facility. Sundet explained DEC's concerns with Ron McKay the Six Robblee's manager on site. |
Rich Sundet |
| 11/29/2012 |
Potentially Responsible Party/State Interest Letter |
In follow-up to telephone dicussions on 10/31 and 11/1/12, DEC issued a Notification of Potentially Responsible Party letter to Andy Robblee of Six Robblees who had purchased the property in late August 2012 from Kathy Little. |
Rich Sundet |
| 4/22/2013 |
Document, Report, or Work plan Review - other |
On August 29th thru 31st and September 13th, 2012, thirteen water samples and one duplicate were collected from monitoring wells MW-1 thru MW-3, MW-5, MW-8 thru MW-11, MW-13, MW-14, MW-15, and B6VE and from a faucet connected to the facility’s public drinking water well. Groundwater samples were analyzed for: gasoline range organics; diesel range organics (DRO); residual range organics (RRO) and; benzene, toluene, ethylbenzene and xylenes (BTEX). The facility well was sampled only for BTEX. MW-3, MW-5 and MW-9 thru MW-11 and the facility well had analyte concentrations below their 18 AAC 75.345 Table C cleanup levels for groundwater. BTEX was non-detect in the facility drinking water sample. MW-1, MW-2, MW-13, MW-14, MW-15, and B6/VE had analyte concentrations above their 18 AAC 75.345 Table C cleanup levels for groundwater. DRO concentrations ranged from <0.600 mg/L to 58.6 mg/L. RRO concentrations ranged from <0.500 mg/L to 8.88 mg/L. GRO concentrations ranged from <0.100 mg/L to 217 mg/L. Benzene concentrations ranged from <0.0005 mg/L to 19.60 mg/L. Toluene concentrations ranged from <0.0005 mg/L to 63.90 mg/L. Ethylbenzene concentrations ranged from <0.0005 mg/L to 5.29 mg/L. Xylenes concentrations ranged from <0.001 mg/L to 26.70 mg/L. Groundwater depths ranged from 5.73 to 8.20 feet below ground surface (bgs) with a groundwater flow direction to the southeast. CSP requests a work plan by May 31, 2013 for the following activities:
1.Vapor Intrusion (VI) Evaluation be performed. CSP suggests starting with a Building Survey. Please refer to DEC’s Vapor Intrusion Guidance for Contaminated Site dated October 2012 Appendix I for the Building Survey.
Please contact CSP within three (3) days of conducting the Building Survey to allow ADEC staff the opportunity to inspect during the survey.
2.Groundwater sampling. CSP requests that MW-01, MW-2, B6VE, MW-13, MW-14, MW-15 be sampled quarterly in order to establish whether a seasonal trend in contaminant concentrations exists at this time. CSP requests MW-5, MW-8, MW-11 be sampled biannually and the facility drinking water faucet annually. CSP will re-evaluate the requested sampling frequency after the first year.
CSP also requests that a groundwater sample from MW-13 or MW-14 be collected and analyzed for volatile organic compounds using EPA Method 8260. This will assist to determine if there are any solvents in the groundwater.
|
Katrina Chambon |
| 5/10/2013 |
Site Visit |
Site visit to observe building survey |
Katrina Chambon |
| 6/18/2013 |
Site Characterization Workplan Approved |
The proposed groundwater monitoring activities will consist of the collection of groundwater samples from the following six monitoring wells MW1, MW2, B6VE, MW13, MW14, and MW15. Groundwater monitoring activities will be conducted in accordance with BGES’ Work Plan for the Custom Truck site, which is dated May 20, 2005 and the modifications discussed below.
The modified activities will include the sampling methodology for collection of the groundwater samples, which will be performed in accordance with the ADEC Draft Field Sampling Guidance (May 2010) and as described below.
CSP approves that the groundwater sampling will be conducted in accordance with BGES’ Work Plan dated 2005 and the modifications included in this email. CSP will not require groundwater sampling for DRO, GRO, RRO, or BTEX if sheening is present in the groundwater; however, CSP request that a VOC sample still be collected. |
Katrina Chambon |
| 8/14/2013 |
Site Reopened |
The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program (CSP) has recently evaluated the potential risk of petroleum vapors adversely impacting the Former Johnson Nissan Jeep/Eagle located at 4748 Old Seward Highway, in Anchorage, Alaska. Based on the information provided to date, it has been determined that the contaminant concentrations remaining in groundwater at the site may pose an unacceptable risk to human health via the indoor air pathway and additional action is warranted, therefore the status of this site will be changed from Cleanup Complete with Institutional Controls to Active.
This decision is based on the benzene concentrations in groundwater remaining at the site. In July 2013 benzene was detected up to 18,500 micrograms per liter (µg/L), which is above the commercial/industrial groundwater target level for benzene of 69 ug/l noted in CSP’s Vapor Intrusion Guidance for Contaminated Sites dated October 2012. Additional investigation will be necessary to address the potential exposure via this pathway.
|
Katrina Chambon |
| 8/20/2013 |
Offsite Soil or Groundwater Disposal Approved |
|
Katrina Chambon |
| 8/28/2013 |
Meeting or Teleconference Held |
Meeting with Mr. Johnson and Mr. Severin to discuss vapor intrusion pathway. |
Katrina Chambon |
| 8/28/2013 |
Meeting or Teleconference Held |
Meeting with Mr. Johnson and Mr. Severin to discuss vapor intrusion pathway. |
Katrina Chambon |
| 9/27/2013 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 78769 USTs - two 5,000 gal. USTs . |
Katrina Chambon |
| 10/9/2013 |
Site Visit |
Site visit to observe sub slab soil sampling. |
Katrina Chambon |
| 11/25/2013 |
Site Characterization Report Approved |
The Contaminated Sites Program (CSP), has completed its review of the July 2013 groundwater sampling and the October 2013 sub-slab vapor characterization report.
Groundwater at the sites remains to be above ADEC cleanup levelsfor GRO, DRO, RRO, and BTEX.
Data submitted in 2012 indicates the hydrocarbon plume in groundwater has migrated off the property to the southeast.
Results from the sub-slab vapor sampling indicate that sub slab contaminant vapors are not present at concentrations that may cause a risk to human health. CSP will not be requesting any further sub-slab vapor sampling at this time.
CSP requests:
1. That all groundwater monitoring wells (except MW10 and MW3) be sampled during the lower water table season, before spring break up in 2014. CSP will re-evaluate the sampling frequency after the winter sampling event.
|
Katrina Chambon |
| 10/9/2014 |
Document, Report, or Work plan Review - other |
Reviewed April 2014 monitoring report, dated October 2014, for former Johnson Jeep/Eagle, currently Six Robblees. Groundwater samples were collected from 9 monitoring wells in April, 2014 after a minimum of three casing volumes had been purged. The wells that were sampled are all located on the subject property. GRO was detected up to 159 mg/l in MW13, DRO was detected up to 70.1 mg/l in MW2, and benzene was detected up to 19.1 mg/l in MW14. The highest contaminant concentrations are located nearest the source area just southeast of the Six Robblees building. Toluene, ethylbenzene, xylenes, and RRO were also detected above cleanup levels in select wells. Site is approved for annual monitoring. |
Bill O'Connell |
| 11/12/2015 |
Document, Report, or Work plan Review - other |
Reviewed the June/July 2015 Groundwater Monitoring Report, dated November 2015. Activities described in the report included annual groundwater monitoring of Monitoring Wells MW-5, MW-8, MW-9, MW-12, MW-14, and the facility well; decommissioning of the sub-slab soil gas implant installed in 2013; and a well survey. Samples collected from Monitoring Well MW-14 exhibited the highest levels of contamination with GRO at 94.8 mg/L, DRO at 53.6 mg/L, RRO at 5.72 mg/L, benzene at 13.5 mg/L, toluene at 19.1 mg/L, ethylbenzene at 1.71 mg/L, and total xylenes at 13.470 mg/L; all of which exceed their respective ADEC groundwater cleanup levels. Of the boundary wells sampled (MW-5, MW-8, MW-9, and MW-12), benzene exceeded cleanup levels in two wells MW-5 and MW-8, and RRO exceeded cleanup levels in MW-12. RRO was present in MW-9, but below ADEC cleanup levels. The sample collected from the facility well did not exhibit any concentrations above ADEC cleanup levels. In a letter dated November 12, 2015 ADEC requested continued annual groundwater monitoring of Monitoring Wells MW-5, MW-8, MW-9, MW-12, MW-14, and the facility well, and to add MW-3 to 2016 monitoring program.
|
Joshua Barsis |
| 6/14/2016 |
Document, Report, or Work plan Review - other |
Reviewed the work plan titled Groundwater Monitoring Activities, dated June 14, 2016 for the Former Johnson Nissan Jeep/Eagle site. Groundwater samples will be collected from the facility well and 6 of the 13 onsite monitoring wells. |
Joshua Barsis |
| 2/21/2017 |
Document, Report, or Work plan Review - other |
Reviewed the Groundwater Monitoring Report (June 2016), dated February 2017 for the Former Johnson Nissan Jeep/Eagle site. Water samples were collected from six monitoring wells (MW-3, MW-5, MW-8, MW-9, MW-12, and MW-14) and the facility well in June of 2016. All samples were submitted for analysis of gasoline range organics (GRO), diesel range organics (DRO), residual range organics (RRO), and benzene, toluene, ethylbenzene, and xylenes (BTEX), except for the facility well, which was only submitted for analysis of volatile organic compounds (VOCs).
Benzene was present above the Table C groundwater cleanup level (GCL) of 4.6 µg/l in every well except MW9 and MW12, and the facility well. The sample collected from MW12 exhibited a concentration of RRO at 3.27 mg/l, which exceeds the GCL of 1.1 mg/l. The sample collected from Well MW14 was the most contaminated and revealed levels of GRO, DRO, RRO, benzene, toluene, ethylbenzene, and xylenes at 125 mg/l, 37.1 mg/l, 2.75 mg/l, 17,100 µg/l, 31,500 µg/l, 1,670 µg/l, and 19,950 µg/l, respectively; all of which exceed their respective GCLs. Groundwater flow direction was shown to be generally southeast at a gradient of 0.0069 foot per linear foot.
|
Joshua Barsis |
| 6/26/2017 |
Document, Report, or Work plan Review - other |
Reviewed the work plan titled 2017 Groundwater Monitoring Activities, dated June 15, 2017 for the Former Johnson Nissan Jeep/Eagle site. Groundwater samples will be collected from the facility well and 6 of the 13 onsite monitoring wells. |
Joshua Barsis |
| 1/24/2018 |
Document, Report, or Work plan Review - other |
Reviewed the Groundwater Monitoring Report (July 2017), dated February 2018 for the Former Johnson Nissan Jeep/Eagle site. Water samples were collected from six monitoring wells (MW-3, MW-5, MW-8, MW-9, MW-12, and MW-14) and from the facility well in July of 2017. All samples were submitted for analysis of gasoline range organics (GRO), diesel range organics (DRO), residual range organics (RRO), and benzene, toluene, ethylbenzene, and xylenes (BTEX), except for the facility well, which was only submitted for analysis of volatile organic compounds (VOCs).
The sample collected from MW12 exhibited a concentration of RRO at 3.27 mg/l, which exceeds the Table C groundwater cleanup level (GCL) of 1.1 mg/l. The sample collected from Well MW14 was the most contaminated and exhibited levels of GRO, DRO, benzene, toluene, ethylbenzene, and xylenes at 52.7 mg/l, 6.96 mg/l, 5,490 mg/l, 675 mg/l, 11,600 µg/l, and 13,390 µg/l, respectively; all of which exceed their respective GCLs. None of the other wells, including the facility well, exhibited contaminant concentrations in excess of Table C cleanup levels. Groundwater flow direction was shown to be generally south-southeast at a gradient of 0.013 foot per linear foot.
Recommended actions include further groundwater monitoring and statistical trend evaluation. |
Joshua Barsis |
| 5/29/2019 |
Document, Report, or Work plan Review - other |
Reviewed the Groundwater Monitoring Report (July 2018), dated May 2019 for the Former Johnson Nissan Jeep/Eagle site. Water samples were collected from six monitoring wells (MW-3, MW-5, MW-8, MW-9, MW-12, and MW-14) and from the facility well in July of 2017. All samples were submitted for analysis of gasoline range organics (GRO), diesel range organics (DRO), residual range organics (RRO), and benzene, toluene, ethylbenzene, and xylenes (BTEX), except for the facility well, which was only submitted for analysis of volatile organic compounds (VOCs). ADEC approves the report.
The sample collected from MW-12 exhibited a concentration of DRO at 1.57 mg/l and RRO at 3.34 mg/l, both of which exceed the applicable Table C groundwater cleanup levels (GCLs). Benzene was present above Table C GCLs in MW-5 (at 0.00836 mg/l) and MW-8 (0.0360 mg/l). The sample collected from Well MW-14 was the most contaminated and exhibited levels of GRO, DRO, RRO, benzene, toluene, ethylbenzene, and xylenes at 48 mg/l, 12.9 mg/l, 1.91 mg/l, 5.58 mg/l, 0.309 mg/l, 7.70 mg/l, and 9.45 mg/l, respectively; all of which exceed their respective GCLs. None of the other wells, including the facility well, exhibited contaminant concentrations in excess of Table C cleanup levels.
Section 8 (conclusions) indicates that all the wells sampled show an overall decreasing trend. Based on this information it was recommended that monitoring be conducted annually. ADEC agrees with this recommendation. |
Joshua Barsis |
| 8/3/2020 |
Site Characterization Report Approved |
Reviewed the Groundwater Monitoring Report (July 2019), dated May 2020 for the Former Johnson Nissan Jeep/Eagle site. Water samples were collected from five monitoring wells (MW-3, MW-5, MW-8, MW-9, and MW-14) and from the facility well in July of 2019. All samples were submitted for analysis of gasoline range organics (GRO), diesel range organics (DRO), residual range organics (RRO), and benzene, toluene, ethylbenzene, and xylenes (BTEX), except for the facility well, which was only submitted for analysis of volatile organic compounds (VOCs).
Monitoring Well 12 (furthest downgradient) was filled with soil and debris and could not be sampled.
Benzene was present above Table C GCLs in MW-5 (at 0.0216 mg/l) and MW-8 (0.0682 mg/l). The sample collected from Well MW-14 was the most contaminated and exhibited levels of GRO, DRO, benzene, toluene, ethylbenzene, and xylenes at 115 mg/l, 7.05 mg/l, 11 mg/l, 23.4 mg/l, 0.569 mg/l, and 16.7 mg/l, respectively; all of which exceed their respective GCLs. Benzene increased in MW-5, MW-8, and MW-14 since the 2018 sampling event. Wells MW-3 and MW-9 did not exhibit contaminant concentrations in excess of Table C cleanup levels. Section 8 (conclusions) recommends that MW-12 is decommissioned. The department suggests that MW-12 is repaired or, if repair not possible, that MW-12 is decommissioned and MW-11 is sampled annually. |
Lisa Krebs-Barsis |
| 5/25/2021 |
Site Characterization Workplan Approved |
A workplan was approved to decommission MW11 and MW12. A single replacement will be installed near the decommissioned MW11 and MW12. A soil sample will be collected from the soil water interface if the PID does not indicated impacted soil in the boring. Following installation and development, the new well and wells MW3, MW5, MW8, MW9, and MW14 will be sampled. Samples will be analyzed for DRO, RRO, GRO, VOC, and lead. |
Lisa Krebs-Barsis |
| 8/25/2021 |
Update or Other Action |
Decommissioning of MW-11 approved as it is paved over. One new well approved for install, slightly NW of MW-12.
|
Jessica Hall |
| 9/8/2022 |
Document, Report, or Work plan Review - other |
ADEC sent comments to Six Robblees’ Inc., on “Groundwater Monitoring Report” (September 2021), dated August 2022. ADEC requested an updated report be submitted for review. |
Jessica Hall |
| 12/5/2023 |
Site Characterization Report Approved |
Sent RP approval for Revised Groundwater Monitoring Report (September 2021), dated November 16, 2023. In 2021, MW 11 and 12 (located in the Old Seward Highway) were decommissioned and MW17 was installed to replace the two wells. Groundwater samples were collected from monitoring wells (MW3, MW5, MW8, MW9, MW14, and MW17) and analyzed for DRO, GRO, RRO, and BTEX. MW3 and MW9 exhibited increased contaminant concentrations of RRO (1.46 mg/L and 1.34 mg/L), in excess of Table C groundwater cleanup levels (GCL). Benzene was present above the GCL in MW-5 (at 0.135 mg/L) and MW-8 (0.0102 mg/L). MW-14 was the most contaminated and exhibited levels of GRO, DRO, RRO, benzene, toluene, ethylbenzene, and xylenes at 23 mg/L, 10.9 mg/L, 1.5 mg/L, 2.04 mg/L, 2.24 mg/L, 0.025 mg/L, and 5.10 mg/L respectively. Two soil samples collected from MW17 soil boring were analyzed for GRO, DRO, RRO, PAH, and lead. Contaminant concentrations were below migration to groundwater cleanup levels. |
Dawn Wilburn |
