| Action Date |
Action |
Description |
DEC Staff |
| 7/11/1996 |
Leaking Underground Storage Tank Release Confirmed - Petroleum |
LUST Site created in CSP for source area ID 77815 Site assessment and tank tightness testing performed by Restoration Science and Engineering. The dispenser to the west was tight, while the dispenser to the east was leaky. Approximately 10 gallons of aviation fuel was lost during testing of the eastern fuel line. Some contaminated soil was removed. Seven confirmation soil samples were taken. Worst case soil contamination levels in sampled soil were 12,400 mg/Kg GRO, 11,900 mg/Kg GRO, 11.8 mg/Kg benzene, 35.4 mg/Kg toluene, 30.6 mg/Kg ethylbenzene, 251.3 mg/Kg total xylenes, 329.1 mg/Kg Total BTEX, and 25 mg/Kg Total Lead. |
Lynne Bush |
| 7/11/1996 |
Site Added to Database |
|
Former Staff |
| 10/25/1996 |
Update or Other Action |
ADEC Voluntary Cleanup Program Corrective Action Final Report dated December 1996, submitted by Restoration Science and Engineering. The eastern piping was excavated and 80.1 tons of contaminated soil was excavated and transported off-site. eight confirmation soil samples collected indicated benzene contamination up to 1.19. Other petroleum consitituents were detected, but below ADEC cleanup levels. |
Grant Lidren |
| 10/25/1996 |
Leaking Underground Storage Tank Cleanup Initiated - Petroleum |
On 10/25/96, 69.5 tons (~45 cubic yards) of hydrocarbon-impacted soil was excavated and transported to ASR for thermal processing. Sample results indicated presence of hydrocarbons in site soils above Level B cleanup standards at the SW edge of the excavation limits. |
Lynne Bush |
| 11/21/1996 |
Update or Other Action |
An additional 10.6 tons (~6 cubic yards) of soil were excavated and transported to off-site treatment on 11/21/96. Samples from the SW portion of the excavation showed that removal of contaminated soil above cleanup levels was achieved. |
Lynne Bush |
| 7/20/1998 |
Update or Other Action |
Reviewed the Terrasat, Inc. report titled "3766 North Point Circle/Campbell Lake UST, Stockpile Treatment and Disposal Plan" dated 7/14/98. A 1,000 and a 2,000-gallon UST were removed from the same excavation on 6/6/98. Total excavation depth was 6.3 ft. bgs. Ground water was encountered at 4 ft. bgs. and seeped into the excavation pit. Both tanks reportedly contained aviation fuel. About 30 cubic yards of contaminated soil was stockpiled on a clean liner and covered. The soil was transported to ASR for thermal treatment by Mr. Bumpus of A&A Enterprises on 7/20/98 after approval to transport and dispose of was given by Colin Basye on 7/15/98. The excavation was backfilled with clean material on 6/6/98. The bigger tank revealed no holes while the smaller tank revealed thin walls, significant amounts of rust, and holes up to 1/2" in its sides upon their removal.According to ADEC UST DB records, both tanks were installed in 1974. The bigger UST was reportedly out of service since about 9/84. Surface and subsurface contamination identified attributed to overfills and leaking tanks. Further investigation suggests that jet fuel has also been stored in the USTs. Nine confirmation samples were taken. Soil samples at 6 feet bgs indicated GRO values up to 14,000 mg/kg, benzene to 31 mg/kg, toulene to 19 mg/kg, and ethylbenzene to 11 mg/kg. It was reported that these levels represent a "worse case scenerio" and was included in the excavated soil. No confirmation samples in the report indicate removal of these contaminate levels. Groundwater samples indicated up to 120 mg/L GRO, 0.700 mg/kg benzene. Sampling results suggests the presence of aviation fuel, jet fuel and possibly biogenics. GW contaminated and contaminated soil remains in the ground. Terrasat recommends conducting a Release Investigation and corrective action |
Colin Basye |
| 9/30/1998 |
Update or Other Action |
Approved the revised Shannon & Wilson, Inc., "Revised Release Investigation Workplan, 3766 North Point Circle, Anchorage, Alaska" dated 9/28/98 and received on 9/29/98. |
Colin Basye |
| 9/9/1999 |
Release Investigation |
"Underground Storage Tank Release Investigation, 3766 North Point Circle; Anchorage, Alaska; August, 1999", submitted to A&A Enterprises by Shannon & Wilson, Inc. and received this date by ADEC. Reviewed by Elaine Cederstrom. |
Elaine Cederstrom |
| 9/20/1999 |
Update or Other Action |
In response to review of the Shannon & Wilson, Inc. "Underground Storage Tank Release Investigation, 3766 North Point Circle; Anchorage, Alaska; August, 1999", submitted to A&A Enterprises, received 9/9/99 by ADEC, staff sent a letter concurring with Shannon & Wilson to implement a monitoring program. Six shallow soil borings were excavated at the project site on October 22 & 28, 1998. Two of the borings were installed in the former UST excavation. the remaining four were installed downgradient, near Cambell Lake, and were completed as MWs. Groundwater was encountered at 3.5 to 5 ft. bgs. DRO and GRO contamination in soils above Method 1, Table B1, ADEC cleanup levels and benzene in soils above Method 2, Table B1, ADEC cleanup levels. DRO to 385 mg/kg, GRO to 732 mg/kg, and benzene to 2.71 mg/kg. DRO, GRO, and benzene contamination in GW are above Table C, ADEC cleanup levels. DRO to 6.5 mg/L, GRO to 12 mg/L, and benzene to 0.32 mg/L. |
Elaine Cederstrom |
| 6/12/2003 |
Update or Other Action |
On 6/12/03, CSP issued a Letter of Non-Objection to Shannon & Wilson implementing their plan Groundwater Sampling 3766 North Point Circle Anchorage dated 4/21/03 to sample 4 existing monitoring wells on site. |
Rich Sundet |
| 11/13/2003 |
Update or Other Action |
Restoration Science & Engineering installed an air-sparging system on the site. |
Bill Petrik |
| 6/23/2004 |
Update or Other Action |
Site transferred from Sundet to Henry. |
Eric Henry |
| 6/30/2004 |
Leaking Underground Storage Tank Corrective Action Underway |
Reviewed and approved the Restoration Science and Engineering "3766 North Point Circle Air-Sparging System, 2004 Site Environmental Service" workplan, dated 6/21/04 which outlined reactivation of the air sparge system and a round of groundwater sampling. Approval letter returned 7/3/04 by USPS after mailed to 3766 North Point Circle. Letter sent to new address, 2631 West 100th Avenue, Anchorage, on 7/12/04. In 2003, S&W sampled monitoring wells B1MW through B4MW. GRO and benzene exceeded the 18 AAC 75.345 Table C cleanup levels for in B2MW and B4MW. Based on this information and areas identified with BTEX contamination, RSE located three air sparge wells in the zone of residual hydrocarbon impact. The air-sparging system was operational on November 23, 2003. Due to very cold ambient air temperatures and low ground water levels, the air-sparging system was shut down on January 23, 2004 and then restarted on March 23, 2004. RSE collected ground water parameters from all four of the S&W wells and from as least one air-sparge points on two separate occasions since May 3, 2004. These data indicate that the system successfully elevated ground water oxygen concentrations and provided treatment for the residual soil and ground water impacts. |
Eric Henry |
| 3/8/2005 |
Update or Other Action |
A copy of the Restoration Science & Engineering report "3766 North Point Circle Air-Sparging System, 2004 Site Environmental Service" dated and received by the program on 12/28/04, was reviewed. Groundwater monitoring report submitted. Water table dropped below air injection point in July. Lake water was pumped into air sparge points to locally raise water table and continue air sparging. This continued until August when the water table naturally raised. The warm water from the lake was effective in activating indigenous microbes and contaminant levels dropped. A bio-flock was observed in the monitor wells during the groundwater sampling event. Ground water sampling was performed again on October 25, 2004 for total lead in all four monitoring wells, and for GRO and BTEX in B2MW. Monitoring well B2MW was mistakenly sampled instead of well B4MW. Groundwater samples indicated contamination up to 6.50 mg/L DRO, 12 mg/L GRO,and 0.320 mg/L benzene. |
Eric Henry |
| 10/4/2005 |
Update or Other Action |
Project manager changed from Eric Henry to Bill Petrik. |
Sarah Cunningham |
| 11/15/2005 |
Update or Other Action |
Used TopoZone Pro in conjunction with Anchorage Area Atlas and site plan to obtain coordinates. Used a Large Size Map at 1:3,333 Scale High-Res Urban Aerial Photo, NAD 83. High degree of confidence in lat/long values. Updated the AHRM Score by changing the Environmental/Recreation response from 3 to 4 resulting in the value changing from 2 to 0 and the Quantity response from 3 to 2 resulting in the value changing from 2.1 to 2. The new AHRM Score was reduced from 38 to 24. The site Priority remains a Medium Hazard. |
Bill Petrik |
| 12/12/2005 |
Update or Other Action |
Talked to David Nyman of Restoration Science and Engineering regarding site status. Nothing new has occurred on site since the 10/25/04 sampling event. RSE will attempt to sample MW-2 and -4 sometime this week due to the thaw that occurred last week. No guarantees that valid samples will be obtained due to the lack of water and flow in the non-summer months. Staff Petrik verbally approved of sampling only MW-2 and -4 at this time. If a declining trend in contaminant concentration below cleanup levels is observed, a NFRAP will be discussed based on a sampling event of all four monitor wells next spring or summer. |
Bill Petrik |
| 9/19/2006 |
Document, Report, or Work plan Review - other |
Reviewed the Restoration Science & Engineering report "Groundwater Monitoring Sample Results June 1 and 2 and August 18, 2006; 3766 North Point Circle on Campbell Lake - Anchorage, Alaska" dated September 12, 2006. 4 MWs were analyzed. Requested a detailed CSM addressing the risk of contaminants migrating to Campbell Lake and demonstration of how that will be averted. Also requested documentation of disposal of IDW from sampling wells in June 2006. |
Bill Petrik |
| 5/10/2007 |
Update or Other Action |
Received and reviewed a copy of the Restoration Science & Engineering "Conceptual Site Model for 3766 North Point Circle on Campbell Lake - Anchorage Alaska" dated 5/8/07. |
Bill Petrik |
| 2/27/2008 |
Exposure Tracking Model Ranking |
Initial ranking. |
Bill Petrik |
| 2/28/2008 |
Update or Other Action |
Report of Groundwater and Surface Water Sampling facility ID # 1695 dated February 28, 2008 and submitted by Restoration science and Engineering (RSE). On May 23 & 28 2007 RSE sampled GW at MW-1 and MW-4, and water column samples CL-1 and CL-2 in Campbell Lake. MW1 groundwater sample indicated DRO contamination up to 14.8 mg/L. The lab commented that this high DRO result is non-diesel in nature. Rather it reflects naturally occurring fatty acids or biogenic compounds. Results for surface samples CL-1 and CL-2 were measured below ADEC surface water standards for TAH and TAqH (Tables 1, 2, 3, and 4). |
Bill Petrik |
| 7/30/2008 |
Update or Other Action |
Report of Groundwater Sampling Facility #1695 dated July 30, 2008 and submitted by Restoration Science and Engineering. On June 2, 2008 RSE collected a GW sample as well as a duplicate from MW-1. Lab results indicate that MW-1 meets ADEC cleanup levels. |
Grant Lidren |
| 12/10/2008 |
Document, Report, or Work plan Review - other |
The ADEC received "Additional Soil Sampling at 3766 North Point Circle.." submitted by RSE and dated December 9, 2008. Three soil borings were collected from the depths of 2 to 6 ft. bgs and analyzed for GRO, DRO and BTEX. Soil sample RSE-SB-1 taken 5.8 to 6 ft. bgs from the area of the former AST contained 0.248 mg/Kg benzene. |
Grant Lidren |
| 12/19/2008 |
Update or Other Action |
ADEC sent a letter to the RP requesting decomissioning of the MWs |
Grant Lidren |
| 7/24/2009 |
Update or Other Action |
ADEC approved MW decomissioning workplan. |
Grant Lidren |
| 7/30/2009 |
Document, Report, or Work plan Review - other |
On this date, ADEC received Well Decommissioning at 3766 North Point Circle, dated July 30, 2009, and submitted by RSE on July 24, 2009. MW1, MW2, AND MW3 were decommissioned. The MWs were removed and filled with bentonite chips and hydrated w/ lake water and surfaced w/ 4 inches of silica sand and capped w/ native soil. Due to previous landscaping, MW4 had been cut off and filled w/ native soil and does not appear to be a conduit to surface water infiltration. |
Grant Lidren |
| 8/14/2009 |
Cleanup Complete Determination Issued |
The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has completed review of the environmental records associated with the Kubick Property. The cleanup actions to date have served to excavate and adequately remove contaminated soil from the site. Based on the information available, ADEC has determined no further assessment or cleanup action is required. There is no longer a risk to human health or the environment, and this site will be designated as closed on the Department's database. |
Grant Lidren |
