| Action Date |
Action |
Description |
DEC Staff |
| 1/8/2009 |
Site Added to Database |
A new site has been added to the database |
Mitzi Read |
| 1/8/2009 |
Exposure Tracking Model Ranking |
Initial ranking with ETM completed for source area id: 78668 name: Surf Laundry & Dry Cleaners |
Mitzi Read |
| 3/3/2009 |
Potentially Responsible Party/State Interest Letter |
DEC issued a letter to the responsible party on March 3, 2009 to inform the responsible party of the statutes that govern contaminated sites cleanup. DEC also conditionally approved ENCON's February 2, 2009 site assessment work plan. ECON proposed to do the following:
1. Drill five soil borings utilizing direct push technology and collect soil samples at five foot intervals or at significant changes in soil properties;
2. Submit all collected soil samples to a DEC approved laboratory to be analyzed for VOC’s by EPA method 8260b;
3. Install five monitoring wells according to CSP guidance (Four of the wells will be installed at the groundwater table and the fifth will be installed beneath the water table at a depth determined at a later date);
4. Survey each groundwater monitoring well, determine groundwater elevations to calculate groundwater flow direction, and collect groundwater samples from each installed well; and
5. Analyze each collected groundwater sample for VOC’s by EPA method 8260b
|
Todd Blessing |
| 9/30/2009 |
Site Characterization Report Approved |
DEC reviewed and commented on Encon Solutions, Inc.’s “3833 Mountain View Drive Anchorage, Alaska Site Assessment Report”, dated June 1, 2009. ENCON Solutions Inc. (ENCON) documented the advancement of three soil borings at the subject site that were eventually completed as groundwater monitoring wells. During the soil boring advancement six soil samples were collected and analyzed for volatile organic compounds (VOCs). Groundwater samples were collected from each new monitoring well following well development.
DEC has reviewed the soil analytical data and determined that the analytical results are rejected. Soil data was reported in wet weight and CSP requires analytical data be reported on a dry weight basis. Furthermore, the sample/solvent ratio was not in accordance with EPA method 8260b. Groundwater analytical data was also reviewed and is acceptable for decision making purposes. No contaminants of concern were detected at levels that exceeded cleanup values. However, tetrachlorethene (PCE) was detected at a level of 0.00352 mg/L; the 18 AAC 75.345 Table C groundwater cleanup value for PCE is 0.005 mg/L.
DEC issued a letter on September 30, 2009 requesting that KIm Cha hire a qualified person to submit a work plan to DEC for review by December 31, 2009. The work plan should define the means and methods to do the following:
• Conduct a vapor intrusion assessment at the subject facility in accordance with the methods and protocols listed in DEC’s July 2009 Draft Vapor Intrusion Guidance for Contaminated Sites;
• Sample groundwater during the winter from monitoring well MW-3 to confirm that the levels of PCE do not exceed the 18 AAC 75.345 Table C groundwater cleanup value of 0.005 mg/L; and
• Develop a conceptual site model in accordance with CSP’s November 2005 Guidance
|
Todd Blessing |
| 8/18/2014 |
Update or Other Action |
Phone call in response to letter sent August 11, 2014. The responsible party will collect their files and schedule a meeting with DEC in the near future. |
Bill O'Connell |
| 10/6/2014 |
Document, Report, or Work plan Review - other |
ADEC received and approved the work plan to address vapor intrusion at the Surf Laundry and Dry Cleaners site. Vapor pins will be used to collect sub-slab vapor samples to help determine if there is a vapor intrusion risk. |
Meghan Dooley |
| 10/16/2014 |
Site Visit |
ADEC conducted a site visit to observe the sub-slab sample locations and sampling event. |
Meghan Dooley |
| 3/17/2015 |
Document, Report, or Work plan Review - other |
Reviewed the report for October 2014 groundwater monitoring at the three wells and sub slab soil gas sampling at three locations. Depth to groundwater was approximately 33 feet. Groundwater samples were analyzed by EPA Method 8260 for volatile organic compounds (VOC). Tetrachloroethylene (PCE) was detected in MW1 (and it's duplicate) at 1.34 micrograms per liter. PCE was not detected in MW2 or MW3. No other VOC were detected in any of the wells. In the previous 2009 sampling PCE was detected in MW3, but not the other wells. Sub slab soil gas was collected in three locations SS1, SS2, and SS3. At SS2, the sampling point nearest the former dry cleaning machine, soil gas detections were equal to or exceeded target screening levels for 1,2-Dichloroethane, chloroform, Trichloroethene (TCE), Benzene, PCE, and 1,1,2-trichloroethane. PCE was detected at 29,000 micrograms per cubic meter. In SS3, northwest of the dry cleaning machine, PCE was detected at 2,200 micrograms per cubic meter, also exceeding the target screening level. No other samples at any of the locations exceeded target screening levels. |
Lisa Krebs-Barsis |
| 3/18/2015 |
Update or Other Action |
Sent letter to landowner and consultant requesting a survey of the groundwater monitoring wells to calculate flow direction for both the 2009 and 2014 sampling events. Also requested a work plan for additional investigation of the vapor intrusion pathway, or installation of the remediation system. |
Lisa Krebs-Barsis |
| 4/10/2015 |
Update or Other Action |
Received update on site groundwater flow direction from the consultant. Based on a previous survey of the site, that had not been sent to the department, the groundwater flow direction is to the north west. Rescinded request for new survey and asked that the work plan include installation of a monitoring well down gradient of the old dry cleaning machine on the adjacent property. |
Lisa Krebs-Barsis |
| 6/19/2015 |
Update or Other Action |
ADEC placed a Notice of Environmental Contamination (NEC) on the property. The NEC remains in effect until a written determination from ADEC is recorded that states that soil and groundwater at the site have been shown to meet the most stringent cleanup levels in 18 AAC 75 and that off-site transportation of soil and groundwater is not a concern. |
Lisa Krebs-Barsis |
| 6/19/2015 |
Update or Other Action |
A second request for a work plan for additional site characterization and possible indoor air remediation was sent to both RPs. |
Lisa Krebs-Barsis |
| 10/20/2015 |
Document, Report, or Work plan Review - other |
Reviewed the work plan for additional groundwater monitoring submitted August 24, 2015. Sent a comment letter requesting a revision of the work plan. |
Lisa Krebs-Barsis |
| 1/13/2016 |
Meeting or Teleconference Held |
DBAC funding pre-application meeting held with Cook Inlet Housing Authority. |
Lisa Krebs-Barsis |
| 6/7/2016 |
Brownfields Award |
DEC Brownfield Assessment and Cleanup services awarded to Cook Inlet Housing Authority related to the presence of contamination at this site. EPA STRP funds $52,229 awarded for a soil and groundwater investigation for FY 2017. |
Bill O'Connell |
| 10/6/2016 |
Document, Report, or Work plan Review - other |
Work Plan for Additional Site Characterization at 3833 Mountain View Drive approved. Site characterization services are being provided to Cook Inlet Housing Authority by the DEC Brownfield Assessment and Cleanup program. Project activities include a hazardous building materials assessment of the Surf Laundry building, advancement and sampling of 12 soil borings, installation and sampling of three groundwater monitoring wells, a level loop survey to evaluate groundwater flow direction and sampling of three existing monitoring wells. Investigative derived waste will be managed and disposed of as RCRA listed hazardous waste. |
Bill O'Connell |
| 5/12/2017 |
Update or Other Action |
Contained-in determination issued by EPA for Surf Laundry IDW soil and water |
Bill O'Connell |
| 7/26/2017 |
Document, Report, or Work plan Review - other |
Reviewed Additional Site Characterization Activities Report for 3833 Mountain View Drive (Surf Laundry). Activities conducted at the site included a hazardous building material inventory, installation of monitoring wells and soil and groundwater sampling. Of the 83 samples of building materials, 40 were found to contain asbestos including samples of wall and ceiling texture, joint compound, floor tile, mastic and thinset, crack filler, roofing materials and exterior patching material. Lead based paint was identified on two wood door frames and in the glazing of a sink in an unoccupied part of the building. The soil and groundwater investigation included the advancement of 11 soil borings, installation of two new monitoring wells, and the collection of soil and groundwater samples from the new and existing wells. Due to the presence of un-marked utilities in the interior of the building, the boreholes planned for the interior were moved to other locations outside of the structure. Two soil samples were collected from each boring, except boring SW-2, where one sample was collected from the groundwater interface. Five groundwater samples were collected in February 2017 and two samples were collected in May 2017. Tetrachloroethylene (PCE) was detected in MW-1 and MW-3, but at concentrations below the cleanup level. No contaminants were detected above cleanup levels in any of the groundwater samples. Groundwater flow was determined to be in a westerly direction. PCE was also detected in a number of soil samples, however only one sample from the groundwater interval in boring PB9 contained PCE above the cleanup level with a detection of 0.291 mg/kg. Investigative derived waste was sampled and did not contain detectable concentrations of contaminants and the soil was disposed of as non-hazardous waste in accordance with a contained-in determination issued by EPA for this purpose. |
Bill O'Connell |
| 1/4/2018 |
Update or Other Action |
Letter issued to current owner requesting additional investigation of vapor intrusion pathway based on a review of the 2014 VI evaluation effort. |
Bill O'Connell |
| 1/30/2018 |
Update or Other Action |
Letter response from attorney for current owner regarding VI evaluation. The property may be transferred in the near future negating the need to a VI evaluation. 60 day extension approved until after future property use is known. |
Bill O'Connell |
| 2/13/2018 |
Document, Report, or Work plan Review - other |
Reviewed Vapor Intrusion work plan for Surf laundry. One 24-hour indoor air sample will be collected in the vicinity of the 2014 sub-slab soil gas sample that exhibited elevated concentrations of PCE. |
Bill O'Connell |
| 2/28/2018 |
Site Characterization Report Approved |
PCE detected in indoor air at 200 ug/m3 above the target level of 41 ug/m3. |
Bill O'Connell |
| 5/9/2018 |
Document, Report, or Work plan Review - other |
Groundwater monitoring wells at the former Brewsters property (SW-1 and SW-2) and the current Surf Laundry property (MMW-1, MW-2, and MW-3) were decommissioned in accordance with DEC guidance |
Bill O'Connell |
| 4/8/2019 |
Site Visit |
Site visit to check on sub slab depressurization system (SSDS). The SSDS pulls vapors from below the slab adjacent to the former location of the old dry cleaning machine |
Bill O'Connell |
| 4/11/2019 |
Update or Other Action |
Work plan request for indoor air sampling sent to 10 PRPs |
Bill O'Connell |
| 7/1/2019 |
Update or Other Action |
Owner is coordinating with PRP group to collect indoor air sample |
Bill O'Connell |
| 11/7/2019 |
Document, Report, or Work plan Review - other |
Work plan approved for the collection on a single indoor air sample at the same location as the previous sample that exceeded the indoor air screening level for PCE. |
Bill O'Connell |
| 2/4/2020 |
Update or Other Action |
An indoor air sample collected at Surf Laundry in January 2020 contained PCE up to 23 ug/m3, below the target level of 41 ug/m3, suggesting the vapor extraction system is effective at reducing indoor air concentrations of PCE. |
Bill O'Connell |
| 10/15/2020 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed for source area 78668 Surf Laundry & Dry Cleaners. |
Bill O'Connell |
| 11/4/2022 |
Site Characterization Workplan Approved |
Reviewed 2022 Vapor Intrusion Assessment Work Plan for Surf Laundry. The goal of the assessment is to conduct a shutdown test of the sub slab depressurization (SSD) system to evaluate if the system is still needed to mitigate intrusion of PCE vapors into the building. The SSD will be powered down at least 14 days prior to sampling then one 24-hour sample and a duplicate will be collected and submitted for TO-15 analysis. A building survey will also be conducted. |
Bill O'Connell |
| 12/16/2022 |
Update or Other Action |
First shutdown test indoor air sample contained PCE at 9.6 ug/m3, below the residential target level of 41 ug/m3. |
Bill O'Connell |
| 1/26/2023 |
Site Characterization Workplan Approved |
Workplan for indoor air and sub-slab vapor sampling is approved. Samples will be collected following a 30-day shut down of the vapor extraction system. |
Bill O'Connell |
| 3/20/2023 |
Document, Report, or Work plan Review - other |
Reviewed Indoor Air Assessment report for Surf Laundry. The assessment included a 14-dayand 30-day shutdown test of the vapor extraction system and collection of a sub-slab vapor sample from below the slab at the former location of a dry-cleaning machine. Following the 14-day shutdown, PCE was detected in indoor air at 9.6 ug/m3 and following the 30-day shutdown, PCE was detected at 15 ug/m3, both of which are below the residential indoor air target level of 41 ug/m3. The sub slab sample contained PCE at 10,000 ug/m3, which is above the soil gas target level of 1,800 ug/m3. These data suggest the vapor extraction system was effective at reducing indoor air concentrations of TCE and also reducing the sub slab vapor concentrations at the hot spot. |
Bill O'Connell |
