| Action Date |
Action |
Description |
DEC Staff |
| 1/9/1990 |
Site Visit |
(Old R:Base Action Code = FI - Field Inspection (General)). Staff observed contaminated soil being found during drilling under hydraulic lift at Municipality of Anchorage transit facility. |
Mike Lewis |
| 1/9/1990 |
Site Characterization Report Approved |
(Old R:Base Action Code = SI - Site Investigation). Reviewed the ENSR "Subsurface Hydraulic Oil Spill Preliminary Investigation Report" dated January 1990. One boring to 5.2' bgs was drilled into the subsurface soil adjacent to a hydraulic ram and below Bus Lift 3 which was the probable leak source and 6 samples were taken and submitted to a laboratory for analysis of TPH, BTEX, cholorbenzene, 1,2-dicholorbenzene, 1,3-dicholorbenzene, and 1,4-dicholorbenzene. The analytical results indicated TPH ranged between 36,000 and 74,000 mg/dry kg, BTEX was below MDLs except 0.5 mg/kg total xylenes in sample MOA-6, and no detections for the chlorobenzenes. Extent of soil and groundwater contamination is unknown. |
Scott Home |
| 4/27/1990 |
Cleanup Plan Approved |
(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). After review of the ENSR "Municipality of Anchorage; Anchorage, Alaska; Subsurface Hydraulic Oil Spill Site Investigation Work Plan; Bus Maintenance Facility; 3650D East Tudor Road" dated April 1990; Document Number 4780-005 sent a letter this date granting conditional approval. Use EPA Method 418.1; identify contamination sources and eliminate their contribution to the problem, current and future; please describe what methodolgy will be used to prevent cross-contamination during installation of MWs; the pump test will not be performed if contamination is discovered so what actions will be taken to characterize the aquifer? Field work occurred during the summer of 1990. |
Mike Lewis |
| 5/3/1990 |
Site Characterization Workplan Approved |
Reviewed the ENSR letter addressing the ADEC comments in its 4/27/90 conditional work plan approval letter and sent a letter this date indicating they are acceptable. |
Mike Lewis |
| 8/1/1990 |
Site Characterization Report Approved |
Review of the ENSR "Municipality of Anchorage; Anchorage, Alaska; Subsurface Hydraulic Oil Spill Site Investigation; Final Report; Bus Maintenance Facility; 3650D East Tudor Road" dated July 1990; Document Number 4780-005; indicated that five soil borings and five monitoring wells were installed in May 1990. TPH soil contamination above the cleanup level was 1,100 mg/kg in MW1, 140 mg/kg in MW2, and 382 mg/kg in MW4, all at 5' bgs. All remaining TPH soil samples (MW3 and MW5) were below the 100 mg/kg cleanup level. GW contamination ranged from 0.8 mg/L TPH in MW3 to 37.0 mg/L TPH in MW5. No sampling for BTEX was performed in GW analyses. THe GW flow direction is NW. |
Bill Petrik |
| 10/5/1990 |
Update or Other Action |
After review of the ENSR letter dated 9/4/90, sent a letter this date to ENSR and the MOA indicating that the department finds the overall position by ENSR and the MOA of no action for cleanup of this spill unacceptable. |
Mike Lewis |
| 11/16/1990 |
Site Added to Database |
Hydraulic oil contamination. |
Scott Home |
| 12/20/1990 |
Document, Report, or Work plan Review - other |
Reviewed the ENSR "Update of Investigation and Remediation Activities of the Subsurface Hydraulic Oil Spill at the Municipality of Anchorage Transit Facility" dated 12/19/90 and received by the department on 12/20/90. The 5 on-site MWs were resampled on 11/8/90. MW1 contained less than 1" of free petroleum product and MW4 had 5-6" which was the first time product was seen in any of the site wells. These wells were subsequently not sampled. The TPH levels were 5.48 mg/l in MW3, 0.33 mg/l in MW5, and ND in MW2. |
Scott Bailey |
| 8/5/1991 |
Cleanup Plan Approved |
After review of a copy of the ENSR "Municipality of Anchorage; Anchorage, Alaska; Remedial Action Plan; Subsurface Hydraulic Oil Release; Bus Maintenance Facility; 3640 East Tudor Road" dated June 1991, Document Number 4780-007, received by ADEC on 7/15/91, a letter was sent this date conditionally approving the plan. The conditions include: If the pilot for the vapor extraction system (VES) shows a magnitude greater recovery of the hydraulic fluid than just pumping, a full scale VES will be installed; ADEC requests monthly water/oil level measurements in the existing MWs through June 1992; during the inital phases, the levels in the MWs will be recorded on a weekly basis; and the results of these items will determine if future monitoring wells on the north and west side of the facility will be required.
MW results from 10/90, 4/91, and 5/91 indicates that free phase hydraulic oil is present in MW1 and MW4.
Action entered by Petrik 5/29/08. |
Scott Bailey |
| 9/14/1992 |
Update or Other Action |
A hydraulic containment/oil recovery system was installed and became operational on September 14, 1992 in an attempt to mitigate the release. |
Bill Petrik |
| 3/26/1993 |
Cleanup Plan Approved |
After review of the ENSR letter dated 3/21/93, the department sent a letter this date approving the use of Guardex bromine tablets to reduce the iron fouling in the oil recovery system. The department also requests that the water used ofr the testing of the head space gas sample also be concurrently analyzed for VOCs by EPA Method 8240. |
Scott Bailey |
| 1/5/1994 |
Document, Report, or Work plan Review - other |
After review of the ENSR letter dated 12/20/93 and today's telephone conversation with the MOA and ENSR, the ADO sent a letter this date to the MOA and ENSR approving the temporary shutdown of the oil recoivery system at this site for up to a period of 3 months. The system has been discharging to the AWWU system under an Industrial Wastewater discharge Permit No. 27 and has been out of permit compliance much of the time for over a year due to occasional high TPH concentrations. A Notice of Violation was issued by AWWU on 12/21/92 because the system was in Significant Non-Compliance for the past 13 months. ENSR attributes fluctuations in TPH concentrations in part to heavy biomass accumulations on the well screen and downhole equipment, and found that biofouling has reduced the effectiveness of the oil/water separator. During the shutdown period the oil/water separator will be cleaned and equipped with a disinfectant/surfactant dispenser, and the normal facility wastewater stream will be evaluated. |
Eileen Olson |
| 5/3/1994 |
Update or Other Action |
The ADO received a letter from ENSR dated 4/29/94 requesting an extension of the shutdown period of the hydraulic containment/oil recovery system until 7/15/94 when, pending MOA Assembly capital expenditure approval, an activated carbon adsorption system to reduce GW discharge concentrations below 10 mg/l TPH installation is scheduled to be completed. In the absence of GW pumping, the performance of the oil/water separator indicates that the discharge limit of 10 mg/l TPH will not be achieved for GW discharged through the oil/water separator. |
Eileen Olson |
| 1/30/2004 |
Update or Other Action |
File number changed from CS69.14 to 2100.38.327. |
Sarah Cunningham |
| 5/31/2007 |
Update or Other Action |
Staff assignment changed from Pikul to Petrik. |
Shannon Oelkers |
| 5/29/2008 |
GIS Position Updated |
Updated the Address-Digitizing latitutde and longitude to the release location using a site map in conjunction with Google Maps, 1:1,067 Scale, NAD 83. The coordinates could only be improved with an on site GPS reading. |
Bill Petrik |
| 6/2/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed. |
Bill Petrik |
| 6/12/2009 |
Site Visit |
During a site visit today, it was noted that the site address changed from 3650 D East Tudor Road to 3701 Dr. Martin Luther King Jr. Avenue. Made corrections in the Contaminated Sites Program (CSP) Database. |
Bill Petrik |
| 4/29/2010 |
Interim Removal Action Approved |
On 4/29/10, DEC approved of an abbreviated work plan submitted by S&W on behalf of the MOA. The plan was submitted via email on 4/29 and was the result of the MOA beginning the installation of two, new hydraulic lifts at the facility. The current construction project involves cutting two sections in the concrete floor and removing the concrete in an area 3 feet wide by 30 feet long (each). The soil beneath the concrete will be removed to a depth of 3 feet for the construction project. It is projected that the total amount of soil removed would be 20 cubic yards (10 from each trench). Previous investigations reportedly found the highest soil contamination at a depth of 5 feet and some horizontal distance from the planned activities. S&W reported that the top of the concrete is free of oil staining. If the base of the concrete is also observed to be free of oil staining we propose to remove loose soil from the concrete with a stiff brush (dry method) and dispose the concrete as solid waste (either at the landfill or other approved concrete disposal facility). Ecavated soil would be stockpiled and sampled for DRO/RRO, and covered within the facility on the concrete flooring. S&W will notify DEC if gross contamination is discovered and will be on site during the work.
|
Rich Sundet |
| 6/2/2010 |
Offsite Soil or Groundwater Disposal Approved |
Reviewed the Shannon & Wilson, Inc. (S&W) "Request to Transport and Treat Impacted Soil, 3701 Dr. Martin Luther King Jr. Avenue, Anchorage, Alaska" dated 6/2/10. The facility had a documented release of hydraulic fluid from the former lift system in 1990 and is listed by the ADEC as "Active" in the Contaminated Sites Program (CSP) Database (DB). A work plan was submitted to ADEC and approved on April 29, 2010. From 5/4 to 5/25/10, a MOA subcontractor demolished the concrete floor and excavated soil to install the new hydraulic lifts. Shannon & Wilson provided personnel to conduct field screening. Soil from the excavation was segregated into potentially contaminated, visually impacted and potentially clean stockpiles. The total volume of soil stock piled was estimated to be 70 cubic yards. Six characterization samples plus one duplicate sample were collected from stockpiled soil. Samples 5212 and 5213/52130 were collected from the visually impacted pile, Samples 5214 and 5216 were collected from the soil identified as potentially contaminated by field screening. Samples 5209 and 5210 were collected from the potentially clean stockpile. Additional analytical samples were collected from the excavation and will be discussed under a separate cover. The analytical samples were analyzed for diesel range organics (DRO), and residual range organics (RRO). With the exception of Sample 5209, the stockpile characterization samples contained concentrations of DRO and RRO greater than the ADEC cleanup levels. As a result all of the stockpiled soil requires treatment or disposal. Signed, dated, and listed conditions to add polycyclic aromatic hydrocarbons (PAH) analysis on the request to transport contaminated soils to ASR for thermal treatment and then faxed it to Oscar Lage of S&W. Called and talked with Oscar requesting that at least 1 PAH sample each is performed for the stockpile samples and excavation samples with the highest analytical results. |
Bill Petrik |
| 7/1/2010 |
Update or Other Action |
The CSP received a letter from Alaska Soil Recycling dated 6/17/10 indicating that 110.19 tons of petroleum impacted soil was received from this site for future thermal treatment. Signed, dated and emailed the form back to ASR acknowledging the transaction. |
Bill Petrik |
| 11/1/2010 |
Update or Other Action |
Talked with Jon Clark via telephone regarding the CSP would be sending the MOA the Cost Recovery PRP letter soon. |
Bill Petrik |
| 11/8/2010 |
Potentially Responsible Party/State Interest Letter |
The CSP sent the MOA a Cost Recovery PRP letter and Fact Sheet this date after informing him verbally on 11/1/10 of its future arrival. |
Bill Petrik |
| 1/6/2011 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 71595 Hydraulic Oil Release. Score increased from 6 to 8. |
Bill Petrik |
| 1/27/2011 |
Document, Report, or Work plan Review - other |
Finished review of a copy of the Shannon & Wilson, Inc. (S&W) "Soil Removal Action 3701 Dr. Martin Luther King Junior Avenue, Anchorage, Alaska" dated 11/3/10 and received 12/3/10. The report presented the summary of activities related to the removal of contaminated soil during excavation conducted for the installation of two new hydraulic lifts at the facility. Analytical results for the in situ excavation samples indicated contaminated soil remaining. DRO was to 9,630 mg/kg and RRO to 45,500 mg/kg in Excavation #1 and to 2,040 mg/kg DRO and 10,100 mg/kg RRO in Excavation #2. No PAHs were detected. Sent a letter this date requesting a work plan for further site groundwater characterization, a CSM, and other information. |
Bill Petrik |
| 12/7/2011 |
Conceptual Site Model Submitted |
Conceptual Site Model and Work plan for addtional site charaterization and product recovery evaluation submitted. |
Katrina Chambon |
| 2/21/2012 |
Site Characterization Workplan Approved |
The November 22, 2011 work plan proposes to repair existing monitoring wells, measure product thickness, collect groundwater samples for laboratory analysis and conduct a short-term product recovery assessment. Based on the results of site characterization & product recovery evaluation, Shannon & Wilson will propose a method for long-term product recovery. This work plan is approved with the following conditions:
Complete copies of field notes need to be provided with the report.
ADEC will determine what analyses will be required in subsequent analytical testing.
The plan proposes to conduct a short-term product recovery assessment on well RW-1 and MW-4. Because of the close proximity of well MW-4 with respect to RW-1, CSP requests that well MW-4 not be assessed. ADEC requests that RW-1 and the well with the most product (besides MW-4) be used for the short term product recovery assessment.
No analytical testing is requested at this time for monitoring wells that contain a sheen or product.
Repair all site monitoring wells so they are accessible.
Laboratory analysis of product is not requested at this time.
|
Katrina Chambon |
| 3/6/2012 |
Meeting or Teleconference Held |
CSP discussed with Shannon & Wilson changes to the approved work plan dated 2/21/2012. The approved changes include.
1. A product sample will be collected from Monitoring Well MW-4 for characterization to evaluate where the impacts to the groundwater at the site are coming from. The sample will be analyzed for GRO, DRO, RRO, VOCs, EDB, metals, and PCBs as stated in the November 22, 2011 work plan.
2. The 5 monitoring wells will be made accessible and measured for product prior to the short-term product recovery evaluation. During the evaluation, product will only be removed from Recovery Well RW-1 (at least initially). The product thickness will be measured to determine recovery rates in Recovery Well RW-1 and each of the monitoring wells that contain product.
3. If a monitoring well other than Well MW-4 contains a large amount of product (on the order of 1 foot or more), and if the product thickness in the well appears to be unaffected by product removal from Recovery Well RW-1, we will do a product recovery evaluation on that well. If the product thickness in a monitoring well is affected by product removal in Recovery Well RW-1, the preferred location of product recovery is from Recovery Well RW-1 only.
|
Katrina Chambon |
| 3/9/2012 |
Site Visit |
Conducted site visit to observe groundwater (GW) sampling product measurement in four GW wells. Monitoring wells (MW) MW-1 has 0.41 ft of product, MW-2 has 0.05 ft of product, MW-3 no product, GW collected, MW-4 has 1.43 ft of product, MW-5 has 1.59 ft of product. Product was not expected in MW-5. Recovery well has 1.8 ft of product. |
Katrina Chambon |
| 3/12/2012 |
Site Visit |
Site Visit to meet with S&W to observe short term product recovery assessment on RW-1. Approximately 3 gallons of product was recovered from recovery well (RW-1). |
Katrina Chambon |
| 4/17/2012 |
Site Characterization Workplan Approved |
Contaminated Site approved Work Plan for Monitoring the Removal of Three Hydraulic Lifts at 3701 Dr. Martin Luther King Jr. Avenue, Anchorage, AK; ADEC File NO. 2100.38.327 dated April 5, 2012.The work plan proposes to observe soil excavation activities, collect field screening and analytical soil samples. This work plan is approved with the following condition: •Complete copies of field notes need to be provided with the report.•Please provide three (3) working days advance notice when planning to do work, to give us an opportunity to be on site to inspect.
|
Katrina Chambon |
| 4/24/2012 |
Offsite Soil or Groundwater Disposal Approved |
Approval to transport investigation derived waste from site to Emerald Alaska. |
Katrina Chambon |
| 6/1/2012 |
Site Characterization Workplan Approved |
Changes to work plan have been approved. Changes consist of; 1)removal of hydraulic lifts in Bays 4, 6, and 9 instead of Bays 6, 8, and 9; 2)removal of the lift structure (hydraulic ram cylinder) from Bay 8, backfilling the concrete pit with gravel, and finishing the surface with a concrete slab; 3) 440 square feet of excavation area (11 feet by 40 feet) will be created per lift instead of 360 square feet with the appropriate increase in the number of samples for screening and analyses; 4) 3-day RUSH analyses of soil samples submitted to the analytical laboratory; and
5)an August to September 2012 timeframe to start the hydraulic lift removal work.
|
Katrina Chambon |
| 6/19/2012 |
Site Characterization Workplan Approved |
CSP approved a change in the work plan. MOA is installing a new hydraulic lift in Bay 10. Shannon and Wilson will be on-site during construction. |
Katrina Chambon |
| 8/21/2012 |
Offsite Soil or Groundwater Disposal Approved |
Approval to transport and treat two 55 gallon drums of contaminated soil. |
Katrina Chambon |
| 4/14/2014 |
Site Visit |
Site visit today. Installation of new hydraulic lifts is underway. Additional action on free product is anticipated following completion of the new lifts. |
Bill O'Connell |
| 6/27/2014 |
Update or Other Action |
Approval granted for the transportation and disposal of approximately 50 cy of petroleum and solvent contaminated soil at Columbia Ridge Landfill |
Bill O'Connell |
| 2/24/2015 |
Site Characterization Report Approved |
Reviewed the Bay 3, 4, and 6 Lift Removal Assessment. The concrete slabs and sub-slabs and old hydraulic lifts were removed for installation of new lifts. Soil was removed beneath the concrete, in each bay, to 3.5 to 4 feet below ground surface. Two stockpiles were transported to the Anchorage Landfill. Two other stockpiles and the concrete rubble were disposed at the Columbia Ridge Landfill. Soil contaminated with diesel range organics (DRO) and residual range organics (RRO) remained in place at Bay 6 in excess of migration to groundwater cleanup levels. Side wall samples from Bay 6 also exceeded the most stringent cleanup levels for arsenic and chromium, no samples from the base were analyzed for metals. Bay 4 had sidewall samples that exceeded the most stringent cleanup levels for arsenic and chromium. DRO and RRO were detected below cleanup levels. No samples from the base were analyzed for metals. DRO was detected greater than cleanup levels in the base of Bay 3 and RRO was detected below cleanup levels in the base. DRO was detected in a sidewall sample exceeding migration to groundwater cleanup levels and RRO was detected just above maximum allowable cleanup levels. |
Lisa Krebs-Barsis |
| 8/20/2015 |
Document, Report, or Work plan Review - other |
Reviewed work plan for Hydraulic Oil Recovery, 3701 Martin Luther King Jr. Avenue, the MOA Public Works Transit Facility. One 6-inch product recovery well will be installed and passive skimmers will be deployed in four wells to recover hydraulic oil from below the concrete slab. One soil sample will be collected during well installation. Monitoring wells that do not contain product will be sampled in 2017 after one year of product recovery is complete. |
Bill O'Connell |
| 10/5/2017 |
Document, Report, or Work plan Review - other |
ADEC reviewed the May 2017 "Hydraulic Oil Recovery" Report. DRO was detected at concentrations of up to 8,290 mg/kg in soil samples, and RRO at concentrations up to 45,200mg/kg. MW-12, and RW-2 contained DRO at 11,000 ug/L and 10,900 ug/L, respectively, above ADEC Table C cleanup Levels. |
Chelsy Passmore |
| 4/12/2018 |
Site Characterization Report Approved |
Field activities included advancing one soil boring, which was completed as a monitoring well, as well as collecting soil and groundwater samples. One analytical soil sample (S3) was collected from soil boring B-6, .which did not contain analytes above ADEC Migration to groundwater cleanup levels. One groundwater sample was collected from monitoring well MW-6. MW-6 contained detectable concentrations of DRO up to 1.0 mg/L and RRO up to 0.450 mg/L (estimated concentration) below ADEC Table C Cleanup levels. |
Chelsy Passmore |
