| Action Date |
Action |
Description |
DEC Staff |
| 12/31/2002 |
Site Added to Database |
Free product was observed in a wet well near the inactive active biological filter (ABF) building and was traced back to a manhole 25 feet from the wet well. Pressure tests on the estimated 600 feet of buried fuel lines at the facility narrowed down the source to include a series of pipelines passing under the power plant concrete pad adjacent to the USTs. CBJ reported recovery of 400 gallons of fresh diesel from the old ABF wet well which acts as an oil-water separator. A sample of groundwater from a monitoring well near the two 15,000 gallon underground tanks was analyzed; the result was 0.29 mg/L DRO. |
Bruce Wanstall |
| 3/14/2003 |
Site Ranked Using the AHRM |
Preliminary ranking. |
Bruce Wanstall |
| 4/3/2003 |
Update or Other Action |
Karen Blue from CBJ reported soil contamination discovered while excavating for upgrades to the UV treatment system. 20 cubic yards taken to the other treatment plant and stockpiled temporarily where there is more room. Juneau Empire called today regarding the contamination. |
Bill Janes |
| 3/1/2004 |
Update or Other Action |
Karen Blue notified me that approximately 180 tons of petroleum-contaminated soil were shipped to Rabanco in WA State last Oct. |
Bill Janes |
| 3/1/2004 |
Update or Other Action |
Emailed Karen Blue asking about status of stockpiled soil. |
Bill Janes |
| 3/3/2004 |
Meeting or Teleconference Held |
with Karen Blue and Denny Kay, treatment plant supervisor. His staff will take GW samples at the monitoring well and the manhole nearby. Karen will look for funding to conduct site characterization. Soil contamination likely remaining on site. |
Bill Janes |
| 5/25/2004 |
Meeting or Teleconference Held |
Telecon with Steve Haavig and Jim Dorn of Carson Dorn. CD will submit a plan for installing sentry monitoring wells. |
Bill Janes |
| 7/2/2004 |
Update or Other Action |
GW monitoring plan approved. Email approval is in Outlook folder. |
Bill Janes |
| 10/15/2004 |
Update or Other Action |
GW monitoring results in from 8/04 sampling. Elevated concentrations of DRO, RRO and benzene in MW-4, located in the area where contaminated soil was removed in 2003. Other three downgradient wells were ND for everything except for minor concentrations of DRO. Next monitoring scheduled for November 2004 |
Bill Janes |
| 4/1/2005 |
Update or Other Action |
Reviewed January 6 report on the 12/13/04 monitoring. MW-4 concentrations still elevated. DRO 6.81 mg/L, Benzene 0.0164 mg/L. RRO non-detect. |
Bill Janes |
| 4/12/2005 |
Update or Other Action |
Reviewed April 4 report on the 3/7/05 monitoring. MW-4 concentrations sitll elevated. 121 ppm DRO plus elevated benzene and RRO above cleanup levels. DRO and benzene detected in MW-1 below cleanup levels. |
Bill Janes |
| 9/1/2005 |
Update or Other Action |
Report for 7/24/05 groundwater sampling received this date. MW-4, in the vicinity of the former source, still has levels of DRO and benzene above cleanup levels (86.1 mg/L DRO and 0.052 mg/L benzene). This event represents CBJ's final planned monitoring of the groundwater wells. |
Bill Janes |
| 10/5/2006 |
Update or Other Action |
Sent email to Karen Blue asking about possibility of pumping from MW-4 at a low flow rate and running the water thru the plant. Also stated that monitoring MW-4 needs to continue but reduced to annual. Monitoring at other wells can be discontinued until it is time to do a final site closure sampling. |
Bill Janes |
| 10/25/2006 |
Update or Other Action |
Telecon with Jim Dorn. There is an old manhole near the generator building near the former source area. The manhole has strong petroleum odors/thin free product layer. The valve in the manhole will be opened to let the contaminated water into the influent pump house and then into the treatment plant. The nearby monitoring well will be measured to confirm a hydrologic connection. |
Bill Janes |
| 2/26/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Bill Janes |
| 5/14/2008 |
Update or Other Action |
PERP provided April 14 letter from Carson Dorn to Denny Kay, plant supervisor, regarding a sub-surface release that occurred in February. As much as 30,000 gallons of heating fuel may have leaked from underground lines on the south side of the SBR building. Two to 12 inches of free product measured in MW5 and MW6. Carson Dorn to install an 8" diameter well neaer MW6 to create a cone of depression. GW will be pumped to the plant to enhance gravitational flow of free product into the recovery well. |
Bill Janes |
| 11/4/2008 |
Exposure Tracking Model Ranking |
The recent release of 30,000gallons of heating oil to the subsurface at the Mendenhall Waste Water Treatment Plant contaminated site has potential to impact an active private drinking water well. As a result, a new updated ranking with ETM has been completed for the source area 74838 UST Fuel Line. The private well is located in a densely populated residential area between the Mendenhall WTP and the Juneau International Airport Fuel Facility contaminated sites. The private well was tested as free of petroleum in 2007 by Chevron to address concern of possible impacts from the Juneau International Airport Fuel Facility. Additional wells may be present even though the area is served by a municipal drinking water system. |
Bruce Wanstall |
| 11/21/2008 |
Meeting or Teleconference Held |
ADEC was represented by the Prevention and Spill Response and Contaminated Sites Programs at a meeting with City and Borough of Juneau Waste Water Treatment Plant Supervisor and the CBJ environmental consultant. The Mendenhall Waste Water Treatment Plant contaminated site is located adjacent to the Mendenhall River and a State Wildlife Refuge. In February 2008, another leaking pipeline was discovered(other leaks were found in 2002 and 2004). Estimates of the release are 20-30,000 gallons of diesel. Product recovery thus far totals over 10,000gallons of diesel from the surface of groundwater. New investigation has found an active seep of petroleum on the banks of the Mendenhall River and free product on groundwater at the property line nearest the river. Stepped up control measures and site investigation were requested by the ADEC. |
Bruce Wanstall |
| 11/24/2008 |
Potentially Responsible Party/State Interest Letter |
PERP (Moore) issued a state letter of interest to CBJ MWWTP, attn: Scott Jeffers, notifying CBJ of liability and responsibility for State oversight costs. Copy is in the CS hard file. |
Sally Schlichting |
| 11/25/2008 |
Document, Report, or Work plan Review - other |
ADEC review of submitted soil boring sample data analytical report found low bias in the benzene, toluene, ethylbenzene and total xylenes results. Matrix interference and high concentration of diesel range hydrocarbon (DRO) resulted in variance out of range in the quality assurance tests. Otherwise the data are useful and are accepted into the record. Data show 6,660ppm DRO found at soil seep on the Mendenhall Riverbank below the Weiss residence property and 28,800ppm DRO detected in soil 15 feet below ground surface at the property boundary nearest the Mendenhall River and the Weiss residence property. |
Bruce Wanstall |
| 1/8/2009 |
Spill Transferred from Prevention Preparedness and Response Program |
Spill transferred by PERP staff Sarah Moore. Spill Number 08119907201; Spill Date 3/12/08; PERP File Number 1513.02.339; Substance = Diesel; Quantity = Over 100 Gallons. Description: Fuel line from underground fuel tank to boilers failed. |
Mitzi Read |
| 4/23/2009 |
Update or Other Action |
An adjacent residential landowner emailed ADEC photos of minor sheen on the Mendenhall River emerging from a riverbank seep due to extensive subsurface soil and groundwater contamination at the Mendenhall wastewater treatment plant (WTP) contaminated site in Juneau. ADEC contacted the facility manager who stated that WTP staff had been checking sentinel wells periodically over the past few months but each time found nothing in the wells (tidal influenced). The City and Borough of Juneau lead environmental contractor CDI stated that well elevations surveyed months ago had not been analyzed into a hydrological flow net and a monitoring well installed to assess off-site subsurface migration of petroleum on the residential property has not been sampled yet. ADEC requested a more timely investigation into the riverbank seep but site assessment is unlikely until mid-May. |
Bruce Wanstall |
| 5/12/2009 |
Meeting or Teleconference Held |
The ADEC met with a new City and Borough of Juneau water treatment facility superintendent to discuss status of the Mendenhall Treatment Plant product recovery and site characterization plans. ADEC requested a feasibility study into on-site treatment of excess water from the ground water drawdown used in the on-site product recovery system. In addition, ADEC requested installation of deeper monitoring wells and a new recovery well to bring under control off-site migration to the neighboring property and seepage to the banks of the adjacent Mendenhall River. |
Bruce Wanstall |
| 7/10/2009 |
Update or Other Action |
ADEC letter was sent to CBJ Utility Superintendent Joe Meyers requesting prompt submittal of workplans for investigation and product recovery at the Wise property boundary. |
Bruce Wanstall |
| 8/4/2009 |
Site Characterization Workplan Approved |
ADEC reviewed and commented on a letter/report workplan sent by CBJ Utility Department for the Mendenhall Wastewater Treatment Plant contaminated site. The workplan addresses concerns and requests made by the State for improved communications, site assessment and site controls on off-site migration of subsurface contamination of ground water and soil. In a few weeks, new product recovery wells will be operational and new ground water monitoring wells will be installed. |
Bruce Wanstall |
| 2/25/2010 |
Update or Other Action |
Contaminated Sites Program requested an update from the City and Borough of Juneau Wastewater Superintendent on changes, events and weekly monitoring data that have occurred over the last six months, free product recovery to maintain site controls and monitoring at the Mendenhall Wastewater Treatment Plant contaminated site in Juneau. In addition, ADEC sent an informal update to the adjacent property owner and their legal representative. |
Bruce Wanstall |
| 5/5/2010 |
Document, Report, or Work plan Review - other |
ADEC conducted a review and has determined that the ground water data in the March 2010 Summary Report by the CBJ Wastewater Utility meet ADEC Quality Assurance Criteria. |
Bruce Wanstall |
| 5/12/2010 |
Update or Other Action |
ADEC requested that the CBJ submit a sampling plan for ADEC approval for the quarterly event due in May 2010. In addition, ADEC requested CBJ report the data in June 2010 with trend analysis of the ongoing monthly well observations and the monitoring well data collected to date. |
Bruce Wanstall |
| 7/21/2010 |
Site Visit |
ADEC walked the banks of the Mendenhall River following a lead from a concerned citizen reporting sheen on the river to the National Response Center. The reported location is adjacent to the Mendenhall Waste Water Treatment Plant contaminated site where continuous Light Non Aqueous Petroleum Liquid (LNAPL) recovery from the ground water is ongoing. Two unregulated underground diesel storage tanks and appurtenances at the facility are responsible for oil spill discoveries in 2002, 2004 and 2008. No sheen was observed during the ADEC site visit. |
Bruce Wanstall |
| 7/23/2010 |
Document, Report, or Work plan Review - other |
ADEC has determined that the ground water data in the Report by CDI meet ADEC field and laboratory and data reporting Quality Assurance criteria. During a site visit to the facility on July 21, 2010, ADEC verbally made three requests for the next (3rd) quarter monitoring report: include copies of river observations for sheen and measure of product in wells made by facility staff, analyze LNAPL recovery well drawdown water for DRO and water quality parameters, and complete a site risk evaluation by CDI, including examination of petroleum off-site migration. |
Bruce Wanstall |
| 11/26/2010 |
Document, Report, or Work plan Review - other |
DEC reviewed the 2010 3rd Quarter Ground Water Monitoring Report dated October 2010. The sample collection from monitoring wells are consistent with methodology in the site characterization and monitoring work plan approved by ADEC. The data meet field and laboratory report quality assurance criteria in Contaminated Sites Program guidance documents, therefore the Report is approved in accordance with 18 AAC 75.335(d). The Report concludes that DRO concentrations were detected above the 18 AAC 75.345 Table C ground water screening level of 1.5 milligrams per liter (mg/L) in ground water samples collected from MW-1 and from MW-3. RRO fractions were detected above Table C ground water cleanup level of 1.1 mg/L in a sample collected from MW-3. All detected concentrations of GRO fractions, toluene, ethylbenzene, and xylenes in ground water samples were below the Table C ground water screening levels. Toluene was not detected in any of the samples. |
Bruce Wanstall |
| 3/1/2011 |
Document, Report, or Work plan Review - other |
DEC has reviewed 2010 3rd Quarter Ground Water Monitoring Report which summarizes the results of groundwater sampling conducted by Carson Dorn Inc (CDI) and the weekly gauging of monitoring wells, observations of the Mendenhall River and free product recovery at the MWWTP conducted by CBJ personnel during the 4th quarter of 2010. The data meet field and laboratory report quality assurance criteria in Contaminated Sites Program guidance documents, therefore the Report is approved in accordance with 18 AAC 75.335(d).
A total of approximately 35 gallons of free product was recovered from MW-8 and approximately 30 gallons of free product was recovered from MW-9 during the 4th quarter of 2010. No product has been recovered to date from MW-3. No sheen was observed on the Mendenhall River by CBJ personnel during the 4th quarter.
CBJ will continue weekly gauging of monitoring wells, observation of the Mendenhall River for sheens, and its efforts to recovery free product from the groundwater. The 1st quarter 2011 groundwater sampling will be conducted by CDI in March 2011. |
Bruce Wanstall |
| 5/27/2011 |
Document, Report, or Work plan Review - other |
DEC has determined that the 2011 1st Quarter Groundwater Monitoring Report by CDI dated April 2011 meets field and laboratory report quality assurance criteria and is consistent with methodology in the site characterization and monitoring work plan approved by DEC in accordance with 18 Alaska Administrative Code (AAC) 75.355(b). Therefore the report is approved in accordance with 18 AAC 75.335(d). Recovery of free product from the groundwater wells was interrupted during this period by a failure of the drawdown pump. Repairs to the pump will be completed and product recovery efforts will resume in monitoring wells MW-8,MW-9 and MW-3. The 18 AAC 75.345 Table C groundwater cleanup level exceedences in the 1st quarter sampling event were limited to DRO and RRO in the MW-3 sample. The 2nd quarter 2011 groundwater sampling will be conducted by CDI in June 2011. |
Bruce Wanstall |
| 10/20/2011 |
Document, Report, or Work plan Review - other |
DEC approves the 2011 2nd Quarter Groundwater Monitoring Report by Carson Dorn Inc that summarizes the results of groundwater sampling conducted by CDI, the CBJ personnel weekly gauging of monitoring wells, observations of the Mendenhall River for sheen and the free product recovery from groundwater during the 2nd quarter of 2011. Repair of the drawdown pump allowed intermittent recovery of free product from the groundwater monitor wells MW-8 and MW-9 during the 2nd Quarter 2011. About 25 gallons was recovered from MW-8 and about 25 gallons was recovered from MW-9. Although sheen was observed in purge water, petroleum concentrations continue to decline in MW-3 and no product was recovered from the well in the 2nd Quarter 2011. The DRO concentration in the monitor well MW-3 sample was 1.6 mg/L which exceeds the Table C cleanup level of 1.5 mg/L. |
Bruce Wanstall |
| 1/24/2012 |
Document, Report, or Work plan Review - other |
DEC letter approves the 2011 3rd Quarter Groundwater Monitoring Report by CDI. The Report covers the following site activity: groundwater sampling by CDI and the CBJ personnel weekly gauging of monitoring wells, observations of the Mendenhall River for sheen and free product recovery from groundwater. No sheen was observed on the Mendenhall River during the period. Weekly well gauging during the period found free product in measureable volume in MW-4, MW-8, MW-9 and MW-12. Each of these four wells are located on the north side of the property. The highest volumes of free product were consistently found in MW-8 and MW-9 and the free product measured in MW-4 and MW-12 had much less volume and was inconsistent during the period. DRO was detected in five out of seven wells sampled; concentrations ranged from the lowest at 0.11 mg/L in MW-13 to 1.9 mg/L in MW-1 and the highest was at 12 mg/L in MW-3. These wells are located on the east, the west and the south sides of the property, respectively. RRO was detected in five of seven wells sampled; the concentrations ranged from lowest at 0.26 mg/L in MW-1 to the highest at 1.8 mg/L in MW-3. The wells are located on the west and south sides of the property, respectively. BTEX compounds were detected in four of the seven wells sampled. The detection of benzene at a concentration of 0.0015mg/L in MW-1 was the only result above Table C cleanup levels for each of the respective BTEX compounds. MW-1 is located on the west side of the property above the banks of the Mendenhall River. |
Bruce Wanstall |
| 3/17/2012 |
Document, Report, or Work plan Review - other |
DEC approved 2011 4th Quarter Groundwater Monitoring Report completed by Carson Dorn Inc (CDI) summarizing the results of the groundwater sampling conducted by CDI and the CBJ site activity of weekly gauging of monitoring wells, the observations of the Mendenhall River for sheen and the free product recovery from groundwater during the 4th quarter of 2011. The field sampling and data reporting were performed by qualified person(s) and are consistent with work plan approved by DEC in 18 AAC 75.355 (b). The data meet field and laboratory report quality assurance criteria in Contaminated Sites Program guidance documents, therefore the Report is approved in accordance with 18 AAC 75.335(d). The well gauging activities, LNAPL recovery rates and groundwater sampling analysis data are sufficient to establish trends in both the LNAPL thickness in wells and petroleum concentrations dissolved in the groundwater. DEC requested that CBJ propose a long term site activity plan that will continue the current site activities with modifications to reduce the frequency of well sample collection, the schedule for data reporting and the number of COCs for laboratory analysis. |
Bruce Wanstall |
| 5/30/2012 |
Update or Other Action |
DEC approved by letter dated May 2012 the CDI Sampling and Analysis Plan for long term groundwater monitoring and reporting that will include the ongoing abatement site activities by CBJ personnel. Groundwater sampling and analysis will be conducted and reported annually; free product recovery, weekly well gauging and observation for sheen on the Mendenhall River will be reported semi-annually. |
Bruce Wanstall |
| 9/10/2012 |
Update or Other Action |
Address updated in database to match the address from the hard file. |
Kristin Thompson |
| 5/14/2013 |
Document, Report, or Work plan Review - other |
DEC evaluated 2012 Annual Groundwater Monitoring Report (Report), dated March, 2013 compiled by Carson Dorn for the CBJ. The Report summarizes analytical results of CDI groundwater sampling, and CBJ weekly gauging of monitor wells, free product recovery, and monitoring of the Mendenhall River for petroleum sheen. Approximately 35 gallons of free product was recovered from MW-8 and less than 10 gallons was recovered from MW-9 during 2012. MW-3 does not have a sufficient volume of free product for recovery and remains offline. Oil sheen and product were observed in MW-4 (0.01 inches to 1.95 inches), MW-8 (0.06 inches to 0.58 inches), MW-9 (0.07 inches to 0.56 inches), and NMW-1 (0.01 inches to 1.25 inches) throughout the year. No sheen was observed on the Mendenhall River by CBJ personnel during 2012. DRO was detected above the DEC groundwater cleanup level of 1.5 mg/L in two samples (MW-3 and NMW-2). RRO, GRO, benzene, ethylbenzene, xylenes, 1-methylnaphthalene, and fluorine were detected below the DEC Table C groundwater cleanup levels. TAqH was calculated to be 21 ug/L in MW-11 which exceeds the DEC standard of 15 ug/L for surface water. The site activity met the objectives of the project and review of the sample collection found that the number of representative samples collected is acceptable and the precision, accuracy and completeness of the resulting analytical data is sufficient to be used to support the decision making process. In accordance with Title 18 AAC 75.360, a qualified person performed data collection methods consistent with DEC methodology in the DEC approved annual monitoring plan. The DEC laboratory report checklist is acceptable and the data meet field and laboratory report quality assurance criteria in Contaminated Sites Program guidance documents, therefore the Report is approved in accordance with 18 AAC 75.335(d). |
Bruce Wanstall |
| 11/5/2013 |
Update or Other Action |
DEC held a telephone meeting with Jolene Cox at CDI. Product levels in MW-1 (1.5-inch) have increased in recent weeks and the CBJ and consultant CDI are conducting a feasibility study to use a peristaltic pump type spill-buddy recovery system to determine if the recharge rate in the small well is sufficient to recover levels. Product recovery in wells MW-8 and MW-9 has been declining in recent years. DEC concurred with the recommendations made by CDI and approved this site activity. |
Bruce Wanstall |
| 6/5/2014 |
Document, Report, or Work plan Review - other |
DEC sent a letter to the City and Borough of Juneau (CBJ) and Carson Dorn Inc (CDI) approving the 2013 Annual Groundwater Monitoring Report, Mendenhall Wastewater Treatment Facility dated May, 2014. CDI completed the report documenting environmental activities at the facility in the 2013 calendar year. The report summarizes facility personnel logs gauging water and petroleum levels in monitor wells, monitoring the Mendenhall River for petroleum sheen and volumes of free product recovered from wells at the facility as well as the analytical results on groundwater samples collected annually by CDI. TAH and TAqH is calculated from the concentrations of hydrocarbon compounds detected in samples from wells located adjacent to the Mendenhall River (MW-1, MW-2, MW-11 and NMW-1). All well samples are analyzed for DRO and RRO. DRO was detected above the groundwater cleanup level of 1.5 mg/L in three samples (MW-1, MW-3 and NMW-2). TAqH was calculated to be 27 ug/L in MW-11 which exceeds the DEC standard of 15 ug/L. In June 2014, a 4-inch well will replace the 2-inch well at NMW-1 to improve the efficiency of recovering free phase petroleum floating on groundwater reaching the well.
|
Bruce Wanstall |
| 7/24/2014 |
Update or Other Action |
CDI contacted DEC on behalf of CBJ to provide an update on the scheduled installation of a new product recovery well located above the bank of the Mendenhall River on the residential property north of the WTP. High tides and flooding a few weeks ago caused fuel to seep from the riverbank near this location causing a sheen on the Mendenhall River. A new Spill Buster oil sensor will be installed in the new well to pump oil floating on groundwater into a recovery reservoir operating 24/7. |
Bruce Wanstall |
| 7/24/2014 |
Site Visit |
DEC performed a safe view site visit and observed no sheen on the surface of the Mendenhall River. A product recovery well installation is planned for the adjacent upriver property. |
Bruce Wanstall |
| 12/9/2015 |
Document, Report, or Work plan Review - other |
DEC has reviewed: 2014 Annual Groundwater Monitoring Report (Report), dated May, 2015 and received by the department on December 7, 2015. Carson Dorn Inc. (CDI) completed the Report documenting Mendenhall River sheen monitoring, continuous free product recovery, monthly well gauging, and annual well sampling at the referenced Site in 2014. The monthly well gauging log reports for the period of August through December, 2014, document that measurable product was present in recovery wells MW-8 and NMW-1 in August and in recovery well NMW-1 in November, 2014. CDI replaced monitor well NMW-1 located on the adjacent property upriver from the Site with a new product recovery well. Free product collected from on-site recovery wells MW-8 and MW-9 during 2014 totaled less than 10 gallons and collection from off-site recovery well NMW-1 totaled less than one gallon. Neither sheen nor free product was observed in the monitor well samples collected in 2014. |
Bruce Wanstall |
| 12/9/2015 |
Long Term Monitoring Established |
DEC approved the following changes to the Long Term Groundwater Sampling and Analysis Plan dated May 2012, to take effect at the end of 2015: 1) Reduce the frequency of annual sampling of monitoring wells MW-3, MW-7, MW-10, MW-13 and NMW-2 to biennial intervals beginning in 2015. These wells will not be sampled in 2015; these wells will be sampled in 2016 for DRO and RRO analysis. 2)Reduce the frequency of annual sampling of the river sentinel monitoring wells MW-1, MW-2 and MW-11 to biennial intervals beginning in 2016. These wells will be sampled for DRO, RRO, BTEX, and PAHs in 2015 and 2016. 3)Since sheen was not observed in any of the monitoring well samples in 2014, suspend indefinitely the monthly gauging of groundwater monitor wells for depth to product, depth to groundwater, oil sheen, and product thickness. 4)Change the schedule of monthly gauging of on-site and off-site product recovery wells (MW-8 & MW-9, and NMW-1 respectively) for depth to product, depth to groundwater, oil sheen, and product thickness to a quarterly schedule (every 90 days). 5)Continue product recovery in on-site wells MW-8 & MW-9. Take the spill buster unit in well NMW-1 offline. If quarterly gauging indicates recoverable free product is present in well NMW-1, then resume operation of the spill buster until product is no longer present. Record such actions in the quarterly gauging log and submit with the next scheduled analytical sampling report. 6)Continue the weekly schedule of observation monitoring of the Mendenhall River for sheen. Include observation results in the next scheduled analytical sampling report.
|
Bruce Wanstall |
| 5/13/2016 |
Update or Other Action |
DEC evaluated a proposal by DOWL Engineering to advance geotechnical borings on the property in preparation for demolition and foundation work on the ABF building at the facility (copy attached) for a biosolids dryer unit and sent approval by email with a request to contain and store all cuttings on the property for disposal at the Bicknell Facility in Juneau, or an equivalent licensed soil treatment facility. |
Bruce Wanstall |
| 8/24/2016 |
Document, Report, or Work plan Review - other |
DEC evaluated the Groundwater Monitoring Report submitted by Carson Dorn Inc. and sent approval to the CBJ by electronic mail today. In accordance with the Long Term Groundwater Sampling and Analysis Plan CDI will collect biennial samples in seven wells this month and will gauge three wells for free product on a quarterly schedule. |
Bruce Wanstall |
| 3/13/2017 |
Document, Report, or Work plan Review - other |
DEC has reviewed and approved Biennial Groundwater Monitoring Report Mendenhall River Wastewater Treatment Plant Juneau, Alaska (Report), dated February, 2017 and received electronically in March, 2017. The Report was prepared and submitted to DEC and the City and Borough of Juneau (CBJ) by Cox Environmental Services (CES) on behalf of Carson Dorn Inc. (CDI). The Report documents environmental sampling at the referenced Site in accordance with the modified Long Term Groundwater Sampling and Analysis Plan (LTGSAP). CBJ will continue daily observation of the Mendenhall River for sheen and will continue free product recovery from wells MW-8 and MW-9. CES will conduct quarterly gauging of on-site and off-site monitoring wells for product and will conduct groundwater sampling again in August 2018. Approval letter was sent by email today to the CBJ.
|
Bruce Wanstall |
| 6/20/2018 |
Update or Other Action |
Petroleum contaminated soil has been encountered at 2 ft. belowground during excavation for the biowaste facility. Contaminated soil is on plastic sheeting and is covered. Cox environmental is going to assess the issue. |
Danielle Duncan |
| 6/25/2018 |
Site Characterization Workplan Approved |
Approved the Cox SAP this date. The contaminated soil stockpile will be sent to Bicknell Inc. for thermal remediation. The contamination will not be chased due to the presence of underground utilities and because it is outside the current scope of work. The final excavation limits will be characterized and diesel range organics (DRO), gasoline range organics (GRO), volatile organic compounds (VOCs), and polycyclic aromatic hydrocarbons (PAHs) will be reported. |
Danielle Duncan |
| 6/26/2018 |
Update or Other Action |
30 cubic yards of petroleum contaminated soil has been taken to Bicknell Inc. from about 5 ft. belowground. I ok'd analyzing polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), and gasoline range organics (GRO) on 10% of the samples. |
Danielle Duncan |
| 1/3/2019 |
Update or Other Action |
Re: upcoming report, the CBJ has been waiting for civil record drawings from Contractor before putting together final report. Jolene Cox will be submitting a report in the near future. |
Danielle Duncan |
| 2/6/2019 |
Update or Other Action |
Per Cox Environmental, a report will be rec'd soon. |
Danielle Duncan |
