| Action Date |
Action |
Description |
DEC Staff |
| 9/12/1991 |
Underground Storage Tank Site Characterization or Assessment |
Received the Gilfilian Engineering, Inc. “UST Removal Environmental Site Assessment Report and Remediation Work Plan for City Of Palmer Equipment Yard, Lots A-1, A-2, Palmer Industrial Park, Replat Of Tracts A, B, E, H-2” dated 9/6/91 and received 9/12/91 for the 8/13/91 USTs removal. Soils under north gas tank show highest level of contamination (2720 ppm VPH). Soils remain above ADEC guidelines for soil cleanup. Possible courses of action listed include passive venting/vapor extraction, test borings to determine extent of contamination, and soil stockpile to used for road sub-base by City of Palmer. |
Mike Krieber |
| 9/13/1991 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 78051 ADD; Petroleum contaminant |
Mike Krieber |
| 9/13/1991 |
Site Added to Database |
|
Mike Krieber |
| 9/14/1991 |
Underground Storage Tank Site Characterization or Assessment |
SA1R; :Action Date changed DB conversion 1/11/11 |
Mike Krieber |
| 9/14/1991 |
Update or Other Action |
CAPR; :Action Date changed DB conversion 1/11/11 |
Mike Krieber |
| 9/14/1991 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
LCAU; : LCAU date changed DB conversion |
Mike Krieber |
| 9/24/1991 |
Document, Report, or Work plan Review - other |
Sent a letter this date in response to review of the Gilfilian Engineering, Inc. “UST Removal Environmental Site Assessment Report and Remediation Work Plan for City Of Palmer Equipment Yard, Lots A-1, A-2, Palmer Industrial Park, Replat Of Tracts A, B, E, H-2” dated 9/6/91 and received 9/12/91.
It appears that significant gasoline contamination remains at the bottom of the excavation. Provide a written statement confirming that most likely the sidewall contamination down to the bottom of the excavation at 22 feet was removed. The proposed method of disposal is to incorporate the material into base course for an asphalt topped road is not approved at this time. You will need to provide a specific plan for placement of the stockpiled soils and a potential impact analysis for review and approval.
The soil is being stored in a temporary storage cell. If the soil disposal is not to take place until the 1992 construction season, a long-term storage cell will need to be constructed prior to winter. You will need to provide documentation that this has been accomplished no later than November 1, 1991, if the material has not been disposed of in another manner.
Please provide a work plan for the proposed drilling two (2) test borings to determine horizontal and vertical migration of the contamination including a specific site plan showing the proposed boring site locations for review and approval prior to drilling. Depending upon the results of samples obtained from the soil borings, and monitor well (s) if groundwater is encountered, passive soil venting/vapor extraction could be an acceptable method of remediation. You will need to provide.a specific plan for this method of remediation for Department review and approval. |
Mike Krieber |
| 10/29/1991 |
Update or Other Action |
Received a letter from the City of Palmer indicating that a long-term storage cell has been established for the contaminated soil stockpile by placing it on a sheet of 10 mil plastic and turning up the edges to prevent leakage and covering the top with a plastic tarp with sand placed along the edge and up the side 3-4' to hold the tarp in place during wind events. |
Mike Krieber |
| 8/11/1992 |
Cleanup Plan Approved |
Reviewed the Gilfilian Engineering "Soil Stockpile Remediation Work Plan" dated and received via facsimile 9/7/92. The plan to spread the soil on the asphalt parking apron appears acceptable and is approved on the condition that any leachate generated by precipitation is prevented from running onto the ground surface which might be accomplished by maintaining a berm around the spread soil, or by some other method. |
Mike Krieber |
| 9/2/1992 |
Document, Report, or Work plan Review - other |
Reviewed a set of lab data received from Mary Shreves of Gilifilian on 9/30/92 for 4 soil samples taken from the stockpile landspread at the airport. Told Mary via telephone that additional samples needed to confrom to the UST regs. |
Mike Krieber |
| 12/8/1992 |
Document, Report, or Work plan Review - other |
Reviewed the Gilifilian Engineering "Soil Stockpile Remediation Report" dated 11/13/92 and received on 11/17/92. The contaminated soil stockpile was spread on a portion of paved runway at the Palmer Airport during the first week of August 1992 in order to receive remediation through volatilization of petroleum hydrocarbons by aeration.
On 9/22/92 and 10/9/92, site inspections of the location were made Mary Shreves of Gilifilian and Vic Gretzinger of the City of Palmer. The stockpile was spread in a lift approximately 90'x165' with an average depth of 3" at a paved vacant parking apron west of the north-south airport runway. There were no areas of runoff observed around the perimeter of the lift.
4 representative samples were collected from different locations of the lift in order to assess the remediation process and sent for laboratory analysis of VPH, EPH, and BTEX. The maximum value of all for samples for all the analytes in ppm are 3.36 VPH, 125 EPH, 0.072 benzene, and 1.911 Total BTEX. All the analytical results are below the cleanup levels established under Matrix Target Level B of 100 ppm VPH, 200 ppm EPH, 0.5 ppm benzene, and 15 ppm Total BTEX.
It is the intention of the City of Palmer to spread the soils at their equipment yard.
It appears that the passive aeration remediation provided sufficient treatment so that the contaminant levels were significantly reduced and to levels acceptable to the Department. The soil will need to be disposed of in a non-sensitive environmental area, and located a minimum of 200 feet from the nearest public well, or 100 feet from the nearest private well. Conditioned upon the proper final disposal discussed in the prior sentence, and based upon the representations in the referenced report and prior correspondence, no further cleanup or remediation efforts are needed for the landspread soils. |
Mike Krieber |
| 12/16/1992 |
Meeting or Teleconference Held |
Discussed the 12/8/92 department letter with Mary Schreves of Gilifilian via telephone and she agreed that the site should not be closed but we did concur with no further action for the landspread soils. Sent a letter this date and reiterated this. The letter also reiterated the department request for a site corrective action plan in the department letter dated 9/24/91 to be submitted by 1/29/93. |
Mike Krieber |
| 3/2/1993 |
Cleanup Plan Approved |
Reviewed the Gilfilian Engineering, Inc., corrective action plan dated
May 11, 1992 that was received on January 11, 1993. Discussed the plan with Ms. Shreves on February 24, 1993, completed the plan review, and have the following comments.
The Department is more concerned with the vertical migration of contamination, rather than
horizontal migration, due to the reported soil type (clean silty sandy gravel). The Department would accept a plan where a soil boring is placed in the location where the contamination was detected, and continue downward until field screening instruments do not detect contamination. For this boring, samples should be obtained at 5-foot increments, beginning at 25', and a sample from the bottom of the boring (where field screening instruments show no contamination). If GW is encountered while field instruments show remaining contamination, the bottom of the boring (after samples are collected at the ground water interface) should be filled with a substance similar to bentonite, in order to eliminate a direct conduit for contamination to enter the ground water.
Depending upon the depth where field screening shows no further contamination (and lab results support the conclusion of acceptable contaminant levels), and upon soil types encountered, additional soil borings may or may not be needed to determine if the contamination has migrated horizontally. (For example, if the field screening shows no further contamination at 25-30 feet, then no additional borings to determine horizontal migration will be needed.) The Department does not object to the placement of additional borings, provided that samples are collected in 5-foot increments beginning at 25' in depth. Also, please note that the Department is willing to allow further excavation in lieu of soil borings.
The plan proposes to install one monitor well to determine if GW has been impacted. Since GW in the area is ~35 feet deep, the Department is not requiring MW installation at this time. If contamination is discovered in soil samples at or near the, GW depth, a MW(s) needs to be installed. Also, please note that it is difficult to place a single MW in a down-gradient location without triangulation. (Without some method to accurately determine the
ground water flow direction; only one well is not acceptable.)
Vapor Extraction system type of remediation is conceptually acceptable to the Department. The specific plans for the installation need to be submitted for Department review and approval prior to installation.
The Department does not object to the passive aeration treatment of the stockpiled soil (and any additional soil, which excavated from the tank pit site) on the asphalt area previously used for passive aeration of contaminated soil. Care will need to be taken to prevent any runoff, resulting from precipitation, onto the ground surface.
Subject to the above plan modifications, the release investigation and soil treatment portions of the submittal are approved for concerns of this Department. Please provide a 48 hour notice prior to field work being conducted, to allow the Department the opportunity to observe the
field work. |
Paul Pinard |
| 11/20/1997 |
Update or Other Action |
ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: CITY OF PALMER |
Jim Hayden |
| 12/15/2006 |
Update or Other Action |
Staff reassigned from Henry to Petrik. |
Aggie Blandford |
| 5/27/2008 |
Exposure Tracking Model Ranking |
Initial Ranking Completed. |
Grant Lidren |
| 8/16/2010 |
Underground Storage Tank Site Characterization or Assessment |
Site name changed from “COP - Palmer Public Works Equipment Yard” to "City of Palmer Public Works Equipment Yard". |
Bill Petrik |
| 8/17/2010 |
Document, Report, or Work plan Review - other |
Reviewed the Gilfilian Engineering, Inc. “UST Removal Environmental Site Assessment Report and Remediation Work Plan for City Of Palmer Equipment Yard, Lots A-1, A-2, Palmer Industrial Park, Replat Of Tracts A, B, E, H-2” dated 9/6/91 and received 9/12/91. The report summarizes the results of the environmental site assessment conducted on the property, and documents the removal of one 1,500 gallon diesel UST and two 1,500 gallon gasoline USTs and related piping and dispensers, by the City of Palmer (COP) on 8/13-14/91. Three pipe joints were uncovered and leaking based on PID soil screening readings. Soil beneath the joints was excavated to 7’ bgs. Soil beneath the dispensers was excavated to 6’ bgs. The UST tops were ~3’ bgs. Soils were excavated to ~10’ bgs beneath the diesel UST and PID readings below it gave no indication of contamination, and two samples were collected. The south gasoline UST was removed, soils were excavated to ~ 11’ bgs, and PID readings indicated the possibility of contamination at this depth. Contamination migrating from between the gasoline tanks, at the fill ends of the tanks was confirmed by PID readings of the soils half way down the adjacent USTs' sides. The north gasoline tank was removed, and soils excavated to 15 feet below grade. PID readings at this point indicated the possibility of product contamination so further excavated occurred to 22‘ bgs where PID readings continued to indicate the possibility of contamination.
Approximately 120 c.y. of contaminated soil was stockpiled on a liner and 4 soil samples taken from it. All the USTs appeared to be structurally sound and the contamination likely due to loose pipe fittings or poorly bedded pipes, resulting in an accumulation of releases over time.
The excavation samples beneath the joints and dispensers were sent for laboratory analysis of VPH, EPH, benzene, and total BTEX. None of these results was above cleanup levels. One of the two diesel UST sample results was ND and the other was 187 ppm EPH. The excavation samples beneath south and north gasoline USTs were sent for laboratory analysis of VPH, benzene, and total BTEX. None of these results for the south gasoline UST was above cleanup levels. The two samples from 21’ bgs and 22’ bgs beneath the north gasoline UST exceeded the cleanup levels for VPH to 2,720 ppm, for benzene to 17.3 ppm, and Total BTEX to 1,571.3 ppm.
All 4 of the stockpile sample results were above the cleanup levels for VPH, EPH, benzene, and Total BTEX with results in ppm to 576, 471, 2.37, and 344.52, respectively.
|
Bill Petrik |
| 9/3/2010 |
Update or Other Action |
After review of the file the CSP sent a letter this date inquiring as to whether the work conditionally approved by the ADEC letter dated March 2, 1993 sent to the City of Palmer or any other subsequent work has occurred at the site. |
Bill Petrik |
| 6/21/2012 |
Meeting or Teleconference Held |
Discussion with Director of Public Works, informed him that Contaminates Sites Program will be sending a potentially reponsible party letter regarding contamination at the site. |
Katrina Chambon |
| 6/26/2012 |
Potentially Responsible Party/State Interest Letter |
Potentially Responsible Party letter sent today. |
Katrina Chambon |
| 11/23/2012 |
Document, Report, or Work plan Review - other |
CSP reviewed, AlaskChem Engineering, reply and summary proposal, received by e-mail on November 15, 2012, regarding the subject site. AlaskChem proposed to investigate the site by sampling four down-gradient drinking water wells ranging from one half mile to one mile from the subject contaminated site. CSP requests that a Release Investigation be performed as described in 18 AAC 78.325 to delineate and characterize the extent of the contamination. CSP requests that the investigation include at least one borehole in the area where the north gas tank was located. Based on the 1991 Gilfilian report the contamination remains in this location. Samples are requested to be analyzed for gasoline range organics, benzene, toluene, ethylbenzene and xylenes.
The work plan can include sampling of the four drinking water wells as a supplement to the work required at the referenced site.
|
Katrina Chambon |
| 2/11/2015 |
Update or Other Action |
Email correspondence with Public Works Director regarding status of site. |
Bill O'Connell |
| 10/3/2018 |
Workplan Requested |
The ADEC sent a letter requesting a work plan for further delineation of the contamination. |
Chelsy Passmore |
| 5/10/2019 |
Site Characterization Workplan Approved |
The ADEC has reviewed the "Work Plan for Release Investigation at 1316 South Bonanza Street, Palmer, AK". The ADEC has no objections to the workplan contingent on the following comments: 1. When field screening a resealable polyethylene bag should be used and 2. When field screening, while heating the sample to a common temperature is advised the sample should be warmed to a temperature of at least 40 F (5 C). |
Chelsy Passmore |
| 8/12/2019 |
Site Characterization Workplan Approved |
The ADEC reviewed the "Release Investigation, 1316 Bonanza St, Palmer AK" report. The project included advancing two soil borings, and collecting analytical soil samples. Four analytical soil samples were collected and based on previous investigations were analyzed for GRO and BTEX (DRO was never present in the tanks previously removed from the site) in addition one sample was analyzed the full suite of VOCs (method 8260C). Soil did not contain contaminant concentrations above ADEC migration to groundwater cleanup levels. |
Chelsy Passmore |
| 10/22/2020 |
Cleanup Complete Determination Issued |
ADEC sent a letter closing the site based on the results of the 2019 release investigation. |
Janice Wiegers |
