| Action Date |
Action |
Description |
DEC Staff |
| 2/2/1988 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; NORTEC submits a plan to ADEC for a site assessment. Three soil/monitoring wells were proposed. |
Former Staff |
| 4/1/1988 |
Release Investigation |
NORTEC site assessment report. One set of USTs containing gasoline and diesel are on-site. Another set of USTs occur in the SE portion of the site but are empty. These USTs have not been used by Parker Drilling. Boring #1 had low levels of soil BTEX and high levels of groundwater BTEX. Soil BTEX was at 4.2 mg/kg and groundwater BTEX was at 62.7 mg/l. Boring #2 had soil BTEX as high as 2,806 mg/kg and groundwater BTEX was at 17.5 mg/l. Boring #3 had soil BTEX as high as 0.033 mg/kg and BTEX was not detected in the groundwater. At all three borings, the soil above 30 feet was fairly impervious and uncontaminated. The source of BTEX appears to be off site. |
Former Staff |
| 10/20/1989 |
Update or Other Action |
REM; Contaminated soil excavation and underground storage tank and associated piping and dispensers removal. Contaminated soils stockpiled on-site pending disposal. Excavations at some point were backfilled with clean fill. |
Former Staff |
| 10/20/1989 |
Release Investigation |
ENSR report of underground storage tank system (UST) removal and site characterization. Contaminated soils were encountered at all three UST sites. All sites excavated to less than 40 mg/kg TPH. Most contamination was attributed to overfilling USTs. Trace tetrachloroethylene was found in the waste oil UST excavation. ENSR did not proceed with further site assessment because levels of contaminants remaining were below clean up levels. ENSR concluded the soil/water interface contamination identified in NORTEC's 4/88 site assessment did not originate from the site but from the adjacent gas station property to the south. Approximately 116 cubic yards of contaminated soils were excavated. |
Former Staff |
| 10/30/1989 |
Update or Other Action |
DEC staff on-site during removal of the 5 (gasoline and diesel) tanks and associated piping from 2 excavations. Some contamination was found at each tank excavation and they were able to excavate all gasoline/diesel contamination based on observations and field readings. All excavation analytical samples met clean up levels. Excavated contaminated soil stockpiled on site for future off-site treatment/disposal. A sixth (used oil) tank at a separate location is to be removed in a few days. |
Former Staff |
| 12/5/1989 |
Update or Other Action |
REM; ENSR requesting disposal of contaminated soils at Regional Landfill. Approved by Solid Waste Services on 12/8/90. Soils transported to landfill in 12/89. Soils from used oil UST could not be disposed of at the Landfill. A disposal plan for this soil has not been submitted yet. |
Former Staff |
| 2/23/1990 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 76547 ADD; Gasoline & diesel contaminant. |
Former Staff |
| 2/23/1990 |
Site Added to Database |
|
Former Staff |
| 2/24/1990 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; :LCAU Date changed DB conversion |
Former Staff |
| 8/30/1990 |
Leaking Underground Storage Tank Corrective Action Underway |
RAPR; ENSR submits an UST removal and site characterization plan. Phase I removing 6 USTs. Phase II determines the existence of product release to soil/groundwater. If contamination exists the extent will be determined and possible remediation plans. ADEC was notified on 8/30 of UST removal scheduled for October. Approved by ADEC 10/89. |
Former Staff |
| 12/28/1990 |
Underground Storage Tank Site Characterization or Assessment |
SA1R; Reviewed a phase 1 site assessment report. |
Former Staff |
| 12/2/1996 |
Update or Other Action |
After receiving treatment/disposal receipts for the used oil stockpile a no further action (closure) letter issued by ADEC on December 2, 1996. Phase II sampling conducted on April 24, 2008 found contamination (up to 361 mg/kg DRO, 1.45 mg/kg PCE, and 0.063 mg/kg methylene chloride) over site cleanup levels in a soil boring near the former used oil tank. Site has been reopened. |
Robert Weimer |
| 3/14/2001 |
Underground Storage Tank Site Characterization or Assessment |
On February 14, 2001 for a Phase II assessment two soil borings (SB-42 and MW-24) were sampled and one was completed as a monitoring well(MW-24). Up to 384 mg/kg GRO, 1.17 mg/kg benzene in the soil samples collected. The groundwater sample collected had non-detect GRO and 0.2 ug/l benzene. SB-42 was placed at the location of the former dispenser near the gasoline and diesel tank USTs removed in 1989. That boring identified 0.0614 mg/kg benzene and 2.23 mg/kg GRO with no hydrocarbon odor at 10-12 feet below ground surface (bgs), and 1.17 mg/kg benzene and 384 mg/kg GRO with a strong hydrocarbon odor at the soil/water interface at 25-27 feet bgs. The report concludes that the soil/water interface contamination is from the releases at the nearby Mapco/Holiday gas station and not from the on-property UST system. |
Lynne Bush |
| 4/20/2001 |
Update or Other Action |
Potential buyer called |
Lynne Bush |
| 4/8/2008 |
Update or Other Action |
File number changed from L55.25 to 2100.26.463. |
Nicole Hurt |
| 9/28/2008 |
Document, Report, or Work plan Review - other |
On April 24, 2008 a five point composite sample of the five largest surface stained soil areas from the western portion of the property near parked buses. The composite surface sample had 1,830 mg/kg DRO, 1,280 mg/kg RRO, and 293 mg/kg GRO. The GRO and BTEX results are considered biased low because of loss of volatiles due to composite sampling. |
Robert Weimer |
| 9/29/2008 |
Document, Report, or Work plan Review - other |
On April 25, 2008 two soil borings were also sampled (SB1 and SB2). Soil boring SB1 was drilled to 17 feet below ground surface (bgs) and soil boring SB2 was drilled to 12 feet bgs. The soil boring drilled near the former used oil tank excavation (SB2) at 15 to 17 feet below ground surface found soils with a petroleum odor with up to 361 mg/kg DRO, 490 mg/kg RRO, 0.47 mg/kg naphthalene, 1.45 mg/kg tetrachloroethene (PCE), 0.063 methylene chloride, and 5.64 mg/kg arsenic. The methylene chloride appears to be a laboratory contaminant as it was also in the trip blank, the arsenic appears to be at naturally occurring levels. The other soil boring (SB1) was drilled in non-backfill soils near the location at the former gasoline tank system found no detectable contamination in the soils shallower (at 10 to 12 feet bgs) than the soil/water interface. |
Robert Weimer |
| 9/30/2008 |
Document, Report, or Work plan Review - other |
On July 1, 2008 four deep soil borings and five shallow borings were sampled.
The five shallow soil borings were drilled to 3 feet below ground surface near the southern edge on the west side of the property just to the south of where surface stained areas were observed and sampled in April 2008 to help assess whether the stained soils had originated from the adjacent APC property. No analytical samples were collected, but all field readings were 0, and no stained soil was observed at the locations of the shallow soil borings. The consultant recommends that the surface stained soils that were observed in April 2008 be excavated and property treated.
The four deep borings were drilled around the area of the former used oil tank to help define the extent of the contamination found there in April 2008. Stained soil with a hydrocarbon odor was encountered at the soil/water interface in each deep boring. Up to 223 mg/kg GRO, 0.05 mg/kg tetrachloroethene (PCE), and 5.70 mg/kg arsenic at the locations sampled. DRO, RRO, and benzene were non-detect, but the detection limit for benzene exceeded cleanup levels. The arsenic appears to be at naturally occurring concentrations. The drill cuttings are stored on the property for future treatment.
The consultant also identified a potential active drinking water well that may be located in the northwest corner of the property be sampled for contamination. An unused drinking water well located on the center of the north side of the property was decommissioned on December 19, 2002. The property is currently on city water and sewer and it appears that it has been on city water since 1996. |
Robert Weimer |
| 10/2/2008 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 76547 name: former used oil tank contamination - Parker Drilling Company. Site ranked on the new Exposure Tracking Model (ETM). The ETM is a new site ranking system that looks at, based on available data, the potential exposure pathways for the contamination remaining at the site. |
Robert Weimer |
| 7/14/2009 |
Document, Report, or Work plan Review - other |
On July 14, 2009 a composite metals sample was collected from the 5 surface stained areas to be analyzed from metals. That sample contained 5.15 mg/kg arsenic, 7.64 mg/kg lead, and 24.3 mg/kg chromium. These metals concentrations appear to be within naturally occurring concentrations for that soil type in this area. |
Robert Weimer |
| 8/18/2009 |
Offsite Soil or Groundwater Disposal Approved |
DEC PERP staff approved transport and thermal treatment of a total of 19.8 cubic yards of contaminated soil excavated from 4 surface stained areas on the western portion of the property. |
Robert Weimer |
| 8/31/2009 |
Document, Report, or Work plan Review - other |
On August 31, 2009 stained soils were excavated from 4 of the 5 stained soil areas identified during the 2008 Phase I/II site work. One of the stained areas, SS4 located on the northwest corner of the property had been covered with fill. When a test pit was dug in that area no stained soils were visible and field readings were 0 ppm on the PID. The other 4 stained areas were excavated until no stained soils remained and all areas read 0 ppm on the PID. Those 4 excavations ranged between 0.83 and 2 feet deep. A total of 19.8 cubic yards of contaminated soil was removed and transported to ASR for thermal treatment. A confirmation soil sample was collected at the base of each of the 4 excavations. Those excavation samples had up to 33.2 mg/kg DRO and 72.7 mg/kg RRO. The samples were non-detect for GRO and benzene. |
Robert Weimer |
| 9/8/2010 |
Document, Report, or Work plan Review - other |
September 8, 2010 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property on to the property to the north of this property (10460 Old Seward Highway). Up to 30,000 ug/l benzene in the monitoring wells sampled on this property. Concentrations increased in 2 of the 10 monitoring wells. Groundwater historically flows to the northwest. The monitoring wells were not purged prior to sampling. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. |
Robert Weimer |
| 9/21/2011 |
Document, Report, or Work plan Review - other |
September 21, 2011 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property on to the property to the north of this property (10460 Old Seward Highway). Up to 1,630 ug/l benzene in the monitoring wells sampled on this property. Concentrations increased in 3 of the 9 monitoring wells. The previously most contaminated monitoring well (MW-31A) was not sampled this monitoring event because it was obstructed. Groundwater historically flows to the northwest. The monitoring wells were not purged prior to sampling. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. |
Robert Weimer |
| 12/8/2011 |
Update or Other Action |
Site status updated from closed to active because of soil contamination identified over site cleanup levels that was identified during April 24, 2008 Phase II soil sampling at the site. |
Robert Weimer |
| 3/17/2014 |
Document, Report, or Work plan Review - other |
September 28, 2012 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property and on to the property to the north of this property (10460 Old Seward Highway). Up to 285 ug/l benzene in the monitoring wells sampled on this property. Concentrations increased in 3 of the 9 monitoring wells on this property. The previously most contaminated monitoring well (MW-31A) was not sampled this monitoring event because it was obstructed. Groundwater historically flows to the northwest. The monitoring wells were not purged prior to sampling. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. |
Robert Weimer |
| 3/18/2014 |
Document, Report, or Work plan Review - other |
On August 26, 2013 the on property monitoring well MW-31A was decommissioned Holiday and was replaced with monitoring well MW-34. In the replacement monitoring well strong hydrocarbon odor and sheen was observed in the drill cuttings from below the groundwater interface. Depth to groundwater was 22.75 below ground surface in that monitoring well, but the monitoring well has a screened interval at 35 to 45 feet below ground surface to monitor a deeper aquifer. MW-31A had previously had the highest concentrations (30.0 mg/l benzene) but had not been sampled since 2010 because on an obstruction in that well. |
Robert Weimer |
| 3/19/2014 |
Document, Report, or Work plan Review - other |
October 9, 2013 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property and on to the property to the north of this property (10460 Old Seward Highway). Up to 16,100 ug/l benzene in the monitoring wells sampled on this property. Concentrations increased in 9 of the 9 monitoring wells on this property that had been previously sampled, the concentrations are the highest since 2007/2008 sampling. The 10th monitoring well (MW-34) was sampled for the first time. The most contaminated monitoring well MW-34 is a replacement monitoring well for MW-31A which historically had the highest concentrations on this property. This monitoring well MW-31A/MW-34 is located between the fuel release at the Holiday Gas Station and the former tanks on this property. Depth to groundwater was 15.78 to 25.31 feet below ground surface on the on-property monitoring wells. Groundwater historically flows to the northwest. Since 2001 groundwater samples were collected without purging prior to sampling. During this monitoring event the monitoring wells were purged prior to sampling. The groundwater samples were collected using a bailer except for MW-34 that was collected using a submersible pump. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. |
Robert Weimer |
| 4/11/2014 |
Update or Other Action |
On April 7, 2014 an estimated 7 gallons of diesel fuel was spilled in the northwest corner of the property during vehicle fueling by a mobile fuel truck. 8.08 tons of contaminated soil was excavated and thermally treated at ASR. |
Robert Weimer |
| 2/18/2015 |
Potentially Responsible Party/State Interest Letter |
State of Alaska notification of hazardous substance liability (PRP) letter was sent to the current property owner. The letter requests that they (1) Submit a work plan to ADEC by May 1, 2015 for the characterization of the extent of soil and possible groundwater contamination at the former used oil tank with additional soil borings and monitoring wells, and implement the work plan within 30 days of ADEC approval of the work plan, with the results submitted to ADEC by September 15, 2015; and (2) Submit a work plan to ADEC by May 1, 2015 for conducting assessment and cleanup of surface stained area SS4, and implement the work plan within 30 days of ADEC approval of the work plan, with the results submitted to ADEC by September 15, 2015. Based on the results of the sampling additional assessment, monitoring, and/or cleanup may be required to issue a closure letter for this site.
By this letter, the Department requests their intentions in writing no later than 15 days of receipt of this letter with regard to the investigation, monitoring, and cleanup of the subject property.
|
Robert Weimer |
| 3/17/2015 |
Update or Other Action |
DEC notified by the property owner's (BM OLD SEWARD LLC) representative (Alaska Petroleum Environmental Engineering) that the current facility operator (MV Transportation) will be complying with the requested work. They request to be copied on future correspondence. |
Robert Weimer |
| 4/22/2015 |
Update or Other Action |
DEC approves request for an extension to June 1, 2015 for the submittal of the requested work plans. |
Robert Weimer |
| 6/24/2015 |
Document, Report, or Work plan Review - other |
DEC discussed proposed work plan with consultant. They will provide a revised work plan for approval soon. |
Robert Weimer |
| 8/20/2015 |
Document, Report, or Work plan Review - other |
September 2014 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property and on to the property to the north of this property (10460 Old Seward Highway). Up to 18,400 ug/l benzene in the monitoring wells sampled. Concentrations increased in 4 of the 9 monitoring wells on this property that had been previously sampled, the concentrations are the highest since 2007/2008 sampling. Free product (0.01 feet) was observed in monitoring well MW-22 for the first time since April 2006. The most contaminated monitoring well MW-34 is a replacement monitoring well for MW-31A which historically had the highest concentrations on this property. This monitoring well MW-31A/MW-34 and monitoring well MW-22 with free product are located between the fuel release at the Holiday Gas Station and the former tanks on this property. Depth to groundwater was 17.35 to 25.31 feet below ground surface on the on-property monitoring wells. Groundwater historically flows to the northwest. During this monitoring event the monitoring wells were purged prior to sampling. The groundwater samples were collected using a bailer except for MW-34 that was collected using a submersible pump with the pump intake in the middle of the 10 foot well screen with a top of well screen that is submerged under the groundwater surface to assess contamination in the deeper aquifer at the site. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. |
Robert Weimer |
| 9/9/2015 |
Document, Report, or Work plan Review - other |
ADEC approves work plan for the characterization of the extent of soil and possible groundwater contamination at the former used oil tank with additional soil borings and monitoring wells and for conducting assessment and cleanup of surface stained area SS4. Analysis for VOCs, GRO, DRO, and RRO. |
Robert Weimer |
| 10/8/2015 |
Update or Other Action |
Talked with current operator/lessee (MV Transportation), the site work proposed in the approved work plan has been delayed because they have not been able to work out with the property owner (BM Old Seward LLC) payment for proposed site work. |
Robert Weimer |
| 5/13/2016 |
Document, Report, or Work plan Review - other |
September 9-11, 2015 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property and on to the property to the north of this property (10460 Old Seward Highway). Up to 19,100 ug/l benzene in the monitoring wells sampled on this property. Concentrations increased in 5 of the 9 monitoring wells on this property that had been previously sampled. No free product as observed in monitoring well MW-22 or any other monitoring well this monitoring event. The most contaminated monitoring well MW-34 is a replacement monitoring well for MW-31A which historically had the highest concentrations on this property. This monitoring well MW-31A/MW-34 is located between the fuel release at the Holiday Gas Station and the former tanks on this property. Depth to groundwater was 18.30 to 27.89 feet below ground surface on the on-property monitoring wells. Groundwater historically flows to the northwest. During this monitoring event the monitoring wells were purged prior to sampling. The groundwater samples were collected using a bailer except for MW-34 that was collected using a submersible pump with the pump intake in the middle of the 10 foot well screen with a top of well screen that is submerged under the groundwater surface to assess contamination in the deeper aquifer at the site. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. Also in monitoring wells MW-22 and MW-29 the top of the water was shallower than the screened interval in the monitoring well so those samples are also considered potentially biased low as they were not collected from a screened interval at the soil/water interface. |
Robert Weimer |
| 6/9/2016 |
Meeting or Teleconference Held |
Meeting with owners representative and consultant to discuss future site work. The consultant is to provide proposed modifications to the previous approved work plan and a notification when the work is to be conducted. |
Robert Weimer |
| 6/23/2016 |
Document, Report, or Work plan Review - other |
DEC approves he June 20, 2016 Work Plan Addendum Number 2. This is an addendum to the previously approved August 7, 2015 work plan. The work plan is for the cleanup and confirmation sampling of surface stain SS4 and the installation of a monitoring well and soil and groundwater sampling at the former used oil tank location. Based on the results of the soil and groundwater sampling additional borings and/or monitoring wells may be required to define the extent of any remaining contamination. |
Robert Weimer |
| 9/13/2016 |
Update or Other Action |
Update from consultant that they are still waiting for the surface stain area SS4 to dry out enough to visually identify the stained soil that is currently under a few inches of RAP fill. |
Robert Weimer |
| 9/15/2016 |
Site Visit |
Site visit to identify the area where the surface stain SS4 was located. They plan to excavate and assess that area this fall. |
Robert Weimer |
| 10/3/2016 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request for transport of the surface stained soil at SS4 to ASR for thermal treatment. The excavation work is planned to be done on 10/10/2016. |
Robert Weimer |
| 10/3/2016 |
Meeting or Teleconference Held |
Discuss with consultant (BGES) regarding the SS4 excavation sample analysis. They are to do BTEX, GRO, DRO, and RRO in all of the samples and PAH in the one excavation sample most likely contaminated based on field readings/observations. |
Robert Weimer |
| 11/14/2016 |
Document, Report, or Work plan Review - other |
On October 10, 2016 contaminated soil was removed at the surface stain area (SS4). The excavated area was 21.1' by 10.7' and 2' deep. Confirmation samples were collected from the base and side walls of the excavation. The samples had up to 47.1 mg/kg DRO, 609 mg/kg RRO, and non-detect BTEX and GRO. The PAH samples collected had detectable contamination that was below November 6, 2016 migration to groundwater and human health cleanup levels. DEC has no objection to backfilling the excavation with clean fill. |
Robert Weimer |
| 1/30/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request to transport 15 gallons of purge water to NRC for treatment. |
Robert Weimer |
| 1/30/2017 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request to transport of 1 cubic yard of contaminated drill cuttings to the Anchorage Region Landfill for disposal. The soil was generated during the recent release investigation work in the area of the former used oil tank. |
Robert Weimer |
| 6/1/2017 |
Document, Report, or Work plan Review - other |
On July 20, 2016 a soil boring drilled at the location of the former used oil tank and completed as a long-term monitoring well (BGESMW1). Soil samples collected identified up to 0.0136 mg/kg TCE, 2.65 mg/kg 1,2,4-trimethylbenzene, 1.79 mg/kg 1,3,5-trimethylbenzene, 0.3 mg/kg ethylbenzene, 14.6 mg/kg GRO, 75.4 mg/kg DRO, 301 mg/kg RRO, and 0.121 mg/kg naphthalene. Other BTEX compounds were non-detect. The highest concentrations were found at the soil/water interface at 26 feet below ground surface (bgs), which had PID field readings of 1000+ ppm and a strong odor. A hardpan clay with silt layer was encountered at 29 feet bgs. |
Robert Weimer |
| 6/1/2017 |
Document, Report, or Work plan Review - other |
On August 17, 2016 a groundwater sample (and its duplicate) were collected from the new monitoring well (BGESMW1) that was installed at the location of the former used oil tank. The monitoring well has a screened interval from 13.8 to 28.8 feet below ground surface (bgs). During this sampling event the depth to groundwater was 23.13 feet bgs. The groundwater samples were collected from the top foot of the water column using a bladder pump after purging the well. Up to 0.796 mg/l GRO, 2.34 ug/l PCE, 1.3 ug/l TCE, 7.82 ug/l 1,2,4-trimethylbenzene, and 8.05 ug/l 1,3,5-trimethylbenzene the groundwater sample collected from this monitoring well. The groundwater sample was non-detect for DRO, RRO, and benzene. |
Robert Weimer |
| 6/1/2017 |
Document, Report, or Work plan Review - other |
September 28-29, 2016 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property and on to the property to the north of this property (10460 Old Seward Highway). Up to 18,300 ug/l benzene in the monitoring wells sampled on this property. Concentrations increased in 3 of the 8 monitoring wells sampled on this property. Free product thickness was not measured for this monitoring event. Since contaminant concentration in monitoring well MW-34 exceeded solubility limits, free product may exist in that area. The most contaminated monitoring well MW-34 is a replacement monitoring well for MW-31A which historically had the highest concentrations on this property. This monitoring well MW-31A/MW-34 is located between the fuel release at the Holiday Gas Station and the former tanks on this property. Depth to groundwater was 19.29 to 26.85 feet below ground surface on the on-property monitoring wells. Groundwater historically flows to the northwest. During this monitoring event the monitoring wells were purged prior to sampling. The groundwater samples were collected using a bailer except for monitoring well MW-34 that were collected using a submersible pump with the pump intake in the middle of the 10 foot well screen with a top of well screen that is submerged under the groundwater surface to assess contamination in the deeper aquifer at the site. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. Also in monitoring well MW-29 the top of the water was shallower than the screened interval in the monitoring well so those samples are also considered potentially biased low as they were not collected from a screened interval at the soil/water interface. |
Robert Weimer |
| 6/12/2017 |
Update or Other Action |
Discussed groundwater sampling with consultant (BGES). They plan to conduct a winter 2017 and spring 2018 groundwater monitoring event so they will have data for all four seasons to evaluate the site for seasonal fluctuations in groundwater contaminant concentrations and trends. |
Robert Weimer |
| 8/30/2017 |
Document, Report, or Work plan Review - other |
On June 21, 2017 a groundwater sample (and its duplicate) were collected from the new monitoring well (BGESMW1) that was installed at the location of the former used oil tank. The monitoring well has a screened interval from 13.8 to 28.8 feet below ground surface (bgs). During this sampling event the depth to groundwater was 23.66 feet bgs. The groundwater samples were collected from the top foot of the water column using a bladder pump after purging the well. The sample and its duplicate were analyzed for GRO, full VOCs, and PAHs. Up to 0.118 mg/l GRO, 1.57 ug/l PCE, and 1.15 ug/l Chloroform (Chloroform was not detected in the trip blank or the method blank) in the groundwater sample collected from this monitoring well. |
Robert Weimer |
| 10/13/2017 |
Document, Report, or Work plan Review - other |
October 11-13, 2017 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property and on to the property to the north of this property (10460 Old Seward Highway). Up to 4,090 ug/l benzene in the monitoring wells sampled on this property. Concentrations increased in 5 of the 8 monitoring wells sampled on this property. Free product of 0.2 feet was measured in monitoring well MW34 this monitoring event which is one of the deeper aquifer monitoring wells. Depth to groundwater was 18.90 to 26.15 feet below ground surface on the on-property monitoring wells. Groundwater historically flows to the northwest. During this monitoring event the monitoring wells were purged prior to sampling. The groundwater samples were collected using a bailer except for monitoring wells MW-32, MW-33, and MW-35 that were collected using a submersible pump with the pump intake in the middle of the 10 foot well screen with a top of well screen that is submerged under the groundwater surface to assess contamination in the deeper aquifer at the site. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. They attempted to repair monitoring well MW-22 but bentonite in the monitoring well prevented sampling. Monitoring well MW-26 could not be located. |
Robert Weimer |
| 11/8/2018 |
Document, Report, or Work plan Review - other |
On November 6, 2017 a groundwater sample (and its duplicate) were collected from the new monitoring well (BGESMW1) that was installed at the location of the former used oil tank. The monitoring well has a screened interval from 13.8 to 28.8 feet below ground surface (bgs). During this sampling event the depth to groundwater was 20.78 feet bgs. The groundwater samples were collected from the top foot of the water column using a bladder pump after purging the well. The sample and its duplicate were analyzed for GRO, full VOCs, and PAHs. Up to 16.2 ug/l PCE, 4.47 ug/l TCE, and 2.62 ug/l Chloroform (Trichloromethane)in the groundwater sample collected from this monitoring well. Chloroform was not detected in the trip blank or the method blank. The GRO and the other compounds were non-detect this monitoring event. |
Robert Weimer |
| 11/19/2018 |
Document, Report, or Work plan Review - other |
On March 22, 2018 a groundwater sample (and its duplicate) were collected from the new monitoring well (BGESMW1) that was installed at the location of the former used oil tank. The monitoring well has a screened interval from 13.8 to 28.8 feet below ground surface (bgs). During this sampling event the depth to groundwater was 23.81 feet bgs. The groundwater samples were collected from the top foot of the water column using a bladder pump after purging the well. The sample and its duplicate were analyzed for GRO, full VOCs, and PAHs. Up to 7.03 ug/l PCE and 2.30 ug/l TCE in the groundwater sample collected from this monitoring well. The groundwater samples meet current cleanup levels for all detected compounds. The GRO and the other compounds were non-detect this monitoring event. The sample results may be biased low due to large bubbles in the sample bottles. |
Robert Weimer |
| 1/30/2019 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 76547 former used oil tank contamination - Parker Drilling Company. |
Robert Weimer |
| 6/11/2019 |
Document, Report, or Work plan Review - other |
September 17-19, 2018 groundwater monitoring event conducted by Holiday whose groundwater plume extends across this property and on to the property to the north of this property (10460 Old Seward Highway). Up to 16,300 ug/l benzene in the monitoring wells sampled on this property (the highest concentration was in monitoring well MW-34 which is in the deeper aquifer). Concentrations increased in 1 of the 7 monitoring wells sampled on this property. No measurable free product this monitoring event. Depth to groundwater was 19.89 to 26.97 feet below ground surface in the monitoring wells on this property. Groundwater historically flows to the northwest. During this monitoring event the monitoring wells were purged prior to sampling. The groundwater samples were collected using a bailer except for monitoring wells MW-32, MW-33, MW-34, and MW-35 that were collected using a submersible pump with the pump intake in the middle of the 10 foot well screen with a top of well screen that is submerged under the groundwater surface to assess contamination in the deeper aquifer at the site. Because the volatile samples were collected using a bailer they are considered biased low due to loss of volatiles using that method. MW-22 was not sampled due to bentonite in the monitoring well. Monitoring wells MW-20 and MW-26 could not be located this monitoring event. |
Robert Weimer |
| 6/11/2019 |
Update or Other Action |
DEC requested another monitoring event (for full VOCs by method 8260 only) in late October or early November of 2019 to see if the groundwater is still over cleanup levels during that season. Based on the results of the requested sampling DEC can evaluate the site for closure.
|
Robert Weimer |
| 1/23/2020 |
Document, Report, or Work plan Review - other |
On October 29, 2019 a groundwater sample (and its duplicate) were collected from the new monitoring well (BGESMW1) that was installed at the location of the former used oil tank. The monitoring well has a screened interval from 13.8 to 28.8 feet below ground surface (bgs). During this sampling event the depth to groundwater was 22.83 feet bgs. The groundwater samples were collected from the top foot of the water column using a bladder pump after purging the well. The sample and its duplicate were analyzed for VOCs as requested. Up to 4.69 ug/l PCE, 1.87 ug/l TCE, 1.44 ug/l Chloroform (Trichloromethane), and 2.14 ug/l Chloromethane in the groundwater samples collected from this monitoring well. The groundwater samples meet current cleanup levels for all detected compounds. The other compounds were non-detect this monitoring event. |
Robert Weimer |
| 1/27/2020 |
Offsite Soil or Groundwater Disposal Approved |
DEC approves request to transport 20 gallons of purge water to NRC for treatment. |
Robert Weimer |
| 3/5/2020 |
Meeting or Teleconference Held |
Talked with owners representative and their consultant (BGES) about the path to closure for this site. They are to submit a work plan for decommissioning the one monitoring well at this used oil tank site. Once documentation is received that the monitoring well has been decommissioned the site is recommended for cleanup complete status (closure without ICs). |
Robert Weimer |
| 3/6/2020 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 76547 former used oil tank contamination - Parker Drilling Company. |
Robert Weimer |
| 3/11/2020 |
Document, Report, or Work plan Review - other |
DEC review and approval of March 9, 2020 work plan to decommission the one monitoring well at the former used oil UST location. The work is scheduled to be conducted in May 2020. |
Robert Weimer |
| 6/11/2020 |
Offsite Soil or Groundwater Disposal Approved |
ADEC staff approved offsite transport of one 30-gallon drum containing decontamination and purge water for treatment and disposal at NRC Alaska LLC. |
Laura Jacobs |
| 7/8/2020 |
Document, Report, or Work plan Review - other |
One remaining monitoring well (BGESMW1)was decommissioned June 11, 2020 and reported to ADEC in a document called Report -- Decommissioning Monitoring Well, July 8, 2020 by BGES, Inc. following ADEC- approved work plan on March 9, 2020. |
Laura Jacobs |
| 12/29/2020 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 76547 former used oil tank contamination - Parker Drilling Company. |
Laura Jacobs |
| 2/11/2021 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. |
Laura Jacobs |
| 2/11/2021 |
Cleanup Complete Determination Issued |
ADEC staff completed a Cleanup Complete Determination for the site, and has issued a closure document to the RP. |
Laura Jacobs |
