p-ac16-05b - Minnesota Pollution Control Agency

p-ac16-05b - Minnesota Pollution Control Agency

DEPARTMENT: SF-00006-05 (4/86) POLLUTION CONTROL AGENCY STATE OF MINNESOTA Office Memorandum  DATE: TO: FROM: PHONE: MEETING DATE: SUBJECT May ...

16MB Sizes 1 Downloads 16 Views

Recommend Documents

2016 Pollution Report - Minnesota Pollution Control Agency
agency of the total volume of water and air pollution that was emitted in the state in the ..... nonpoint sources in the

Manure Management Plan - Minnesota Pollution Control Agency
Manure Management Plan. A Step-by-Step Guide for Minnesota Feedlot Operators. Name of farming operation. MPCA registrati

Fuel-related Wastes - Minnesota Pollution Control Agency
Aug 4, 2016 - Discarded products containing common fuel ingredients, including those .... Unusable ethanol-water mixture

Eagan Lakes - Minnesota Pollution Control Agency
Nutrient budgets and recommended reductions for Bur Oaks Lake (Lake ID: 19-. 0259-00). ...... site runoff control;. · P

Eco-Industrial Development - Minnesota Pollution Control Agency
Industrial symbiosis and byproduct exchanges. ▫ Eco-parks or clusters. ▫ Clean renewable energy and sustainable mate

Staff Directory - Minnesota Pollution Control Agency
Johnson, Chuck. 218-316-3906. REG/NCRW [email protected] Brainerd. Johnson, Darrell. 651-757-2550. MN. IT darre

Animal Mortality Plan - Minnesota Pollution Control Agency
Purpose: This Animal Mortality Plan is for handling dead animals in ... Catastrophic loss: A catastrophic event such as

Fact Sheet #2 - Minnesota Pollution Control Agency
owner of the real property is entitled to the benefit of the “innocent landowner” provisions of .... CERCLA also inc

wq-cwc2-17h - Minnesota Pollution Control Agency
Aug 21, 2017 - Bus will park on a gravel road and members will have ~10-minute walk up ... 9:00 Knife River Bank Stabili

Endocrine Disrupting Compounds - Minnesota Pollution Control Agency
Jan 15, 2008 - this report: Summer Streets (primary author), Mark Ferrey, Paul Hoff, ... Agency; Deb Swackhamer, Peter S

DEPARTMENT:

SF-00006-05 (4/86)

POLLUTION CONTROL AGENCY

STATE OF MINNESOTA

Office Memorandum  DATE: TO: FROM:

PHONE:

MEETING DATE: SUBJECT

May 12, 2016    MPCA Advisory Committee Members                         Kathy Sather         Division Director         Remediation Division      651‐757‐2691             May 24, 2016    MPCA Superfund Program Update to the Permanent List of Priorities 

      I.

Status  The Minnesota Pollution Control Agency (MPCA) is authorized to take any removal or remedial (cleanup)  action necessary to protect the public health, welfare or the environment whenever there is a release, or  substantial threat of release, from a facility of any pollutant, contaminant, or hazardous substance that  presents an imminent and substantial danger to the public health, welfare, or the environment. The law  requires the MPCA to adopt the State Superfund Permanent List of Priorities (PLP) and to update the list  annually. MPCA proposes sites to be added to the State Superfund PLP so necessary enforcement actions or  State resources can be used to complete additional investigation or cleanup necessary to address risks from  the release of hazardous materials, and to allow for public engagement.  State Superfund resources are used  if no viable responsible parties can be identified. Responsible parties are also liable for prior costs incurred  by the State in responding to such releases of hazardous substances. Before any update of the PLP is  adopted by the MPCA, we must publish the proposed update in the State Register and provide a 30‐day  public comment period. The MPCA published notice of its intent to update the PLP in the May 9, 2016,  edition of the State Register. As of the May 24, 2016 meeting date, there will be 15 days remaining for public  comment on these updates. 

II.

Background  The MPCA is proposing to add ten sites (Sites) and remove one site from the State Superfund PLP. Sites  being added to the list are current or former dry cleaners, metal platers or other industries that use  industrial chemical solvents, including trichloroethylene (TCE), and perchloroethylene (PCE, or perc) in their  business processes. When these chemicals are spilled or otherwise migrate into soil or groundwater, the  resulting contamination can spread outward through groundwater or upward as vapors into residential or  commercial basements and foundations.    The ten sites proposed to be added to the list include the following:     1. D’s Fabric Care, Cloquet, is a dry cleaning operation that is being investigated for groundwater and  soil vapor contamination.  2. West 66th Street and Vincent Avenue, Richfield, was the site of small spills or disposal of the dry  cleaning chemical PCE that contaminated groundwater.  3. Hospital Linen, St. Paul, is a former commercial laundry and industrial dry cleaning site where PCE  was found in soil and soil vapor;  4. South East Hennepin Area Groundwater and Vapor Site, Minneapolis, is a TCE‐contaminated  site that has ongoing groundwater monitoring and soil vapor testing; 

 

p-ac16-05b · 5/4/16

5. Lyndale Avenue Corridor, Bloomington, is home to more than 40 commercial and industrial  businesses, including vehicle repair, dry cleaning and manufacturing, that have or currently use  hazardous chemicals which contaminated soil and groundwater;  6. Arcade Street North and Hawthorne Avenue East, St Paul, is the site of a former dry cleaner and  auto service station where industrial solvents have been found in groundwater and soil;  7. 55th Street and Lyndale Avenue South, Minneapolis, is the site of a former dry cleaning operation;  the MPCA is investigating a PCE release which has contaminated groundwater and soil vapor;  8. Universal Plating, Minneapolis, was a chemical and mechanical plating facility that closed in  2009 and has been included in the MPCA’s Voluntary Investigation and Cleanup program since 2014;  9. Former Pure Oil Bulk Storage Facility, Excelsior, where industrial solvents PCE and TCE were  detected in groundwater and soil vapors, from an unknown source;  10. University Avenue and Pascal Street Area, St Paul, is an area that has had TCE and PCE detected in  soil and groundwater.    The one site proposed for delisting is Boyer Lumber Superfund site in Virginia, Minnesota. This site was an  undeveloped mining property that later became a manufacturing facility and later a lumber yard and  hardware store. Investigation at the Boyer Lumber Site identified volatile organic compounds (VOCs),  polycyclic aromatic hydrocarbons (PAHs), pentachlorophenol (PCP), and dioxins in soil and VOCs, PAHs and  PCPs in groundwater. Contaminated soils were removed to a landfill and backfill material was brought in  from a clean, off‐site source. Groundwater impacts were only found on the site property and were not  identified beyond the property boundaries. The MPCA has determined that the site cleanup is protective of  public health and welfare and the environment. Therefore, legal conditions for removing the site from the  PLP have been met by Boyer Lumber and no additional actions are necessary. MPCA staff recommends that  the Boyer Lumber site be removed from the State Superfund PLP.    Additional information about each of these sites and rationale for listing and delisting can be found in the  site summaries on the MPCA Superfund Program web page https://www.pca.state.mn.us/waste/superfund‐ program.    III.

CB:rm 

Issues  A. Is there additional information the Commissioner should consider at any or all of these sites?  B. Is there additional or different information relevant to these listings that the MPCA might share with  the community?  C. Are there concerns you believe the public may have with these listings or this cleanup work?   

SF-00006-05(4/86)

DEPARTMENT :

STATE OF MINNESOTA

POLLUTION CONTROL AGENCY

Office Memorandum DATE : TO :

FROM :

PHONE : SUBJECT :

May 2, 2016    John Linc Stine  Commissioner    Kathy Sather  Division Director  Remediation Division    651‐757‐2691    State Register Notice for Update of State Superfund Priority List  

Attached is the State Register Notice and printing order for the next update of the State Superfund Priority  List or Permanent List of Priorities (PLP). In this update, the Minnesota Pollution Control Agency (MPCA) is  proposing to add ten and remove one site from the PLP.  The ten additions to the PLP are:    1) D’s Fabric Care, Cloquet MN  2) West 66th and Vincent Avenue, Richfield MN   3) Hospital Linen, St. Paul MN  4) Southeast Hennepin Avenue Area‐Wide Groundwater and Vapor Plume, Hennepin County  5) Lyndale Avenue Corridor, Bloomington MN   6) Arcade Street and Hawthorne Avenue, St. Paul MN  7) 55th Street and Lyndale Avenue South, Minneapolis MN  8) University Avenue and Pascal Street Site, St. Paul MN  9) Pure Oil Bulk Storage Facility, Excelsior MN  10) Universal Plating Facility, Minneapolis MN    The MPCA recommends removing the Boyer Lumber Site located in Virginia MN from the PLP.      Included is a staff memorandum for each proposed site addition, outlining the rational for each respective  addition and deletion from the PLP.    Under current state rules, the MPCA is required to update the PLP at least annually. Notices of these updates  are required to be published in the State Register, and allow for a 30 day public comment period. This MPCA  update is planned for publication in the State Register on May 10, 2016. This will allow the 30 day comment  period to extend two weeks past the May 24th MPCA Citizen’s Advisory Committee meeting.  MPCA staff also  sends out copies of the State Register Notice to affected or interested parties regarding each site, and will  issue a news release concerning the update. MPCA staff have also been in contact with local government and  elected officials in the communities listed above.  Following closure of the comment period, MPCA staff will  respond to any comments submitted and make final recommendations as to the listing of sites to the PLP.      Please sign the State Register printing order form and return to Tom Higgins of my staff.        KS:csa    TDD (for hearing and speech impaired only): (612)282-5332 Printed on recycled paper containing at least 10% fibers from paper recycled by consumers

Attachment Cc: Sandeep Burman, Remediation Division Crague Biglow, Superfund Section Tom Higgins, Superfund Section Jennifer Jevnesik, Superfund Section Greg Small, Superfund Section Al Timm, Superfund Section Fred Campbell, Superfund Section Mark Ostby, Superfund Section Rick Jolly, Superfund Section Chris Formby, Superfund Section Wayne Sarappo, Superfund Section Carmen Netten, Legal Services

Minnesota Pollution Control Agency Remediation Division

Notice of Proposed Update of the State Superfund Priority List (State Superfund List) (also known as the Permanent List of Priorities (PLP)) Among Releases or Threatened Releases of Hazardous Substances or Pollutants or Contaminants. NOTICE IS HEREBY GIVEN that the Minnesota Pollution Control Agency (MPCA) is publishing for public comment proposed additions to the State Superfund List which lists releases or threatened releases of hazardous substances, pollutants, or contaminants for which the MPCA may take removal or remedial actions under the Minnesota Environmental Response and Liability Act (MERLA), Minn. Stat. §§ 115B.01115B.20. Pursuant to Minn. Stat. § 115B.17, the MPCA is authorized to take any removal or remedial action which the MPCA deems necessary to protect the public health, welfare or the environment whenever there is a release, or substantial threat of release, from a facility of any pollutant or contaminant which presents an imminent and substantial danger to the public health, welfare, or the environment, or whenever a hazardous substance is released or there is a threatened release of a hazardous substance from a facility. Minn. Stat. § 115B.17, subd. 13 required the MPCA to establish priority rules regarding releases or threatened releases of hazardous substances, and pollutants or contaminants. These rules, Minn. R. ch. 7044, became effective on April 5, 1993. Minn. Stat. § 115B.17, subd. 13 also require the MPCA to adopt the State Superfund List and to update the list annually according to the criteria set forth in the priority rules. Before any update of the State Superfund List is adopted by the MPCA, it must be published in the State Register and a 30-day public comment period must be provided. This notice is, therefore, published to inform the public that the MPCA is proposing to update the State Superfund List and to solicit public comment on the proposed additions. Pursuant to Minn. Stat. § 115B.17 and Minn. R. 7044.0950, the MPCA is proposing the following changes to the Superfund List.

The MPCA is proposing to add the following ten sites (Sites) to the State Superfund List (Hazard Ranking Score assigned pursuant to Minn. R. 7044.0350 follows the Site): 1) D’s Fabric Care, Carlton County (5.81); 2) West 66th Street and Vincent Avenue, Hennepin County (50.19); 3) Hospital Linen, Ramsey County (50.19); 4) South East Hennepin Area Groundwater and Vapor Site, Hennepin County (33.91) 5); Lyndale Avenue Corridor, Hennepin County (38.93); 6) Arcade Street North and Hawthorne Avenue East, Ramsey County (24.62); 7) 55th Street and Lyndale Avenue South, Hennepin County (17.38); 8) Universal Plating, Hennepin County (25.09); 9) Former Pure Oil Bulk Storage Facility, Hennepin County (7.13); 10) University Avenue and Pascal Street Area, Ramsey County (18.43). These MPCA sites are being proposed for addition to the State Superfund List as in each case, State Superfund resources will likely be necessary to complete appropriate response actions. Each MPCA Site has been assigned to Response Action Classes C and D (see Minn. R. 7044.0450). The four response action classes are defined as follows: Class A - Declared Emergency; Class B - Response Actions Completed and Operation and Maintenance/Long-Term Monitoring Ongoing; Class C - Response Actions Necessary or in Progress or First Year Operation and Maintenance at a Site; and Class D - Remedial Investigations and Feasibility Studies Necessary or in Progress. The MPCA is also proposing to delist the following Site from the Superfund List: Boyer Lumber Superfund Site, Virginia, St. Louis County. The 2.75 acre site was listed on the Permanent List of Priorities (PLP) February 25th, 2014. Several investigations were completed by various MPCA programs between 1990-2013 at the Boyer Lumber Site which identified volatile organic compounds (VOC’s), polycyclic aromatic hydrocarbons (PAH’s), pentachlorophenol (PCP), and dioxins in soil and VOC’s, PAH’s and PCP’s in groundwater. In most cases, contaminated soils were removed to a landfill and backfill material was brought in from a clean, off-site sources. Groundwater impacts were only found on the site property and were not identified offsite during investigation activities. The impacted groundwater was also found to be stable and not moving offsite. The site investigations determined there was a low risk to human health associated with the contaminated

groundwater from the Boyer Lumber site. The lack of nearby water supply wells near the site along with the limited size and mobility of the groundwater contamination support this determination. The Minnesota Decision Document (MDD) as amended March 31st, 2016 documents that the MPCA has determined the selected response actions are protective of public health and welfare and the environment. MPCA staff recommends that the Boyer Lumber site be removed from the PLP because Boyer Lumber has taken all reasonable and appropriate actions related to the identified releases. The PLP deletion criteria have been met by Boyer Lumber for the site and no further Minnesota Environmental Response and Liability Act (MERLA) response actions are necessary there. In addition, no further MERLAfunded response actions are necessary because there is no longer a threat to human health or the environment under the current land use. The MPCA invites members of the public to submit written comments on the proposed ten additions and one deletion from the State Superfund Permanent List of Priorities. All written comments with regard to these proposed changes to the Superfund List must be received no later than 4:30 p.m. on June 10th, 2016. Written comments regarding the proposed updates to the State PLP should be submitted to: Tom Higgins, Site Remediation and Redevelopment Section, Remediation Division, Minnesota Pollution Control Agency, 520 Lafayette Road North, St. Paul, Minnesota 55155-4194. There will also be a public meeting of the MPCA Advisory Committee on Tuesday May 24th, 2016 at which time the proposed listings and delisting described in this document will be discussed. Additional information will also be posted about each site on the MPCA website. All written comments received by the above deadline will be considered by the MPCA in establishing the updated State Superfund List.

John Linc Stine, Commissioner Minnesota Pollution Control Agency

MPCA proposes to add ten, delete one of state’s contaminated sites on Minnesota Superfund list

Receive Updates Enter Email Address Go



MPCA proposes to add ten, delete one of state’s contaminated sites on Minnesota Superfund list Minnesota Pollution Control Agency sent this bulletin at 05/09/2016 10:29 AM CDT

Having trouble viewing this message? View it as a webpage.

For release: May 9, 2016 Contact: Anne Moore, 218-302-6605

MPCA proposes to add ten, delete one of state’s contaminated sites on Minnesota Superfund list St. Paul, Minn. --The Minnesota Pollution Control Agency (MPCA) is proposing to delete one from, and add 10 contaminated sites to, the state’s Superfund Permanent List of Priorities. These sites have known risks to

human health and the environment, or the potential to pose these risks.  The public is invited to comment on the proposed sites’ additions and deletion by June 10, 2016. MPCA Remediation Division staff will make a presentation about the proposed list changes to the MPCA Advisory Committee on May 24 in St. Paul. This meeting will be open to the public; however, formal comments about the proposal must be made to the designated staff contact described below. Nine of the 10 sites are located in the Twin Cities metro area and the remaining site is in Cloquet, Minnesota.   Sites being added to the list are current or former dry cleaners, metal platers or other industries that use industrial chemical solvents, including trichloroethylene (TCE), and perchloroethylene (PCE, or perc) in their business processes. When these chemicals are spilled or otherwise migrate into soil or groundwater beneath the establishment, the resulting contamination can spread outward through groundwater or upward as vapors into residential or commercial basements and foundations. The Metro-area sites being proposed for addition are: 55th Street and Lyndale Avenue South, Minneapolis, is the site of a former dry cleaning operation; the MPCA is investigating a PCE release which has contaminated groundwater and soil vapor; Arcade and Hawthorne, St Paul, is the site of a former dry cleaner and auto service station where industrial solvents have been found in groundwater and soil; Hospital Linen, St Paul, is a former commercial laundry and industrial dry cleaning site where PCE was found in soil and soil vapor;

https://content.govdelivery.com/accounts/MNPCA/bulletins/1480dcb[5/10/2016 4:07:23 PM]



MPCA proposes to add ten, delete one of state’s contaminated sites on Minnesota Superfund list Lyndale Avenue Corridor, Bloomington, is home to more than 40 commercial and industrial businesses, including vehicle repair, dry cleaning and manufacturing, that have or currently use hazardous chemicals which contaminated soil and groundwater; Pure Oil Bulk Storage Facility, Excelsior, where industrial  solvents PCE and TCE were detected in

groundwater and soil vapors, from an unknown source; Southeast Hennepin Area Ground Water and Vapor Plume, Hennepin County, is a TCE-contaminated site that has ongoing groundwater monitoring and soil vapor testing; Universal Plating Facility, Minneapolis, was a chemical and mechanical plating facility that closed in 2009 and has been included in the MPCA’s Voluntary Investigation and Cleanup program since 2014; University Avenue and Pascal Street, St Paul, is an area that has had TCE and PCE detected in soil and groundwater; and, West 66th Street and Vincent Avenue, Richfield, was the site of small spills or disposal of the dry cleaning chemical PCE that contaminated groundwater. The Cloquet-based site being proposed for addition is the former D’s Fabric Care, which was a dry cleaning operation that is being investigated for groundwater and soil vapor contamination. The one site proposed for delisting is Boyer Lumber Superfund site in Virginia, Minn. This site was an undeveloped mining property that later became a manufacturing facility and later a lumber yard and hardware

store. Based on MPCA hazardous materials cleanup actions, no further work is necessary at this site to protect public health and the environment. Online access to all sites being added or taken off the list is available here. Placement on the PLP list makes funding available to investigate and clean up these sites. The last time the agency added or deleted a site from this list was in September 2015. Comments about the proposed site additions and deletion may be made by 4:30 p.m. on June 10, 2016 to Tom Higgins, MPCA Site Remediation and Redevelopment Section, at (651) 757-2436 , (800) 657-3864 or

[email protected] For more information about the state’s Superfund program, visit https://www.pca.state.mn.us/waste/superfundprogram. Broadcast version The Minnesota Pollution Control Agency is proposing to add ten contaminated sites to the state’s Superfund list.  All but one is in the Twin Cities metro area; the other is in Cloquet, Minnesota. Sites added to this list become eligible for funding which allows the agency to investigate and clean up these sites. One site in Virginia, Minnesota is proposed for delisting, meaning the site has been cleaned up and no longer qualifies as a Superfund site. The agency’s Remediation Division staff will make a presentation about the proposed list changes to the MPCA Advisory Committee on May 24 in St. Paul. This meeting will be open to the public; however, comments about the proposal must be made in writing by June 10. To learn more about these sites or to comment about the M-P-C-A’s proposal, visit the M-P-C-A web site. ### The mission of the MPCA is to protect and improve the environment and enhance human health. St. Paul • Brainerd • Detroit Lakes • Duluth • Mankato • Marshall • Rochester • Willmar www.pca.state.mn.us • Toll-free and TDD 800-657-3864  

https://content.govdelivery.com/accounts/MNPCA/bulletins/1480dcb[5/10/2016 4:07:23 PM]

DEPARTMENT:

DATE: TO:

FROM:

POLLUTION CONTROL AGENCY 5/2/16

SF-00006-05 (4/86)

STATE OF MINNESOTA

Office Memorandum

Sandeep Burman Manager Site Remediation and Redevelopment Remediation Division

Crague Biglow Supervisor Site Remediation and Redevelopment Section Remediation Division Jennifer Jevnisek Site Remediation Unit 2 Site Remediation and Redevelopment Section Remediation Division

PHONE: SUBJECT:

651-757-2181 Permanent List of Priorities Listing Request D’s Fabric Care, 12 Second Street, Cloquet (SR264)

Minnesota Pollution Control Agency (MPCA) staff recommends listing the D’s Fabric Care property, located at 12 Second Street in Cloquet (the Site) on the Minnesota Permanent List of Priorities (PLP). This will allow state funds to be used to conduct investigation activities and response actions. This Site was previously referred to the MPCA Superfund program based upon the findings from the MPCA Site Assessment program investigations of the site (SA4521) conducted in 2012. Between 2014 and 2015, MPCA Superfund program staff provided several opportunities for the owner of the Site to voluntarily address investigation and response activities; the offers were declined. Background The D’s Fabric Care Site (Figure 1) was referred to the MPCA Site Assessment Program when perchloroethylene (PCE) was detected in groundwater samples collected during a petroleum leak site investigation at the adjoining Frank Lloyd Wright (FLW) designed gas station (Leak ID 6780). PCE is commonly used as a dry cleaning solvent. The D’s Fabric Care property was identified as the possible source of the PCE release due to its upgradient location, and because of its past use as a laundry and dry cleaning service from 1966 to at least 1995. The D’s Fabric Care property is currently occupied by Cloquet Laundromat. An investigation conducted by the MPCA Site Assessment program in 2012 confirmed that high concentrations of PCE vapors are present under the D’s Fabric Care building (the highest concentration was 1,070,000 micrograms per cubic meter, µg/m3), and that the PCE release appears to originate from beneath this building near the former dry cleaning machinery. PCE soil vapor concentrations are depicted on Figure 2, which also denotes the extent of the investigation.

PCE is also present in shallow groundwater beneath the site and has been detected in water discharging from an on-site basement sump. Potential risks associated with this release include chlorinated solvent vapor intrusion into buildings (including the site, the adjoining FLW designed service station building (currently operated by Best Oil Inc.), and nearby residences), the discharge of contaminated sump water to the municipal sanitary sewer system, and potential migration of contaminated groundwater to off-site receptors (including the St. Louis River located about 1000 feet to the north). Based on the significant risks to human health and the environment identified, the MPCA Site Assessment Program has referred this Site to our State Superfund program for oversight of further investigation and response actions. MPCA Investigation Activity The MPCA Site Assessment Program initiated investigation of the Site in April 2012 through the hiring of a multi-site contractor to conduct a limited site investigation which consisted of a limited historical file review, potential source investigation, and field activities (collection of soil, groundwater, and soil-gas samples). Eight soil probes/temporary monitoring wells were advanced, two sub-slab points were installed in the former D’s Fabric Care building, and five temporary soil gas borings were advanced. The historical review confirmed the site was occupied by a dry cleaning business from 1966 to 1995. Subsurface soil contamination was detected in a boring north of the adjoining service station, and the detection of PCE was attributed to contaminated groundwater migrating from the source area. The highest concentration of PCE in groundwater (84.1µg/L) was detected in a sump water sample collected from the basement of the D’s building. PCE concentrations were noted to be above the Class 2B Chronic Standard but below the Maximum Standard for surface water. Groundwater samples collected throughout the site had PCE detections exceeding the Minnesota Department of Health (MDH) established health risk limit (HRL) for drinking water. PCE concentrations in groundwater ranged from non-detect to 84.1 µg/L. Sub-slab samples from the D’s building exceeded 10 times the industrial intrusion screening value (ISV) of 30 µg/m3 for PCE. Soil-gas samples collected throughout the property noted the presence of PCE at concentrations exceeding the current residential ISV of 2 µg/m3; concentrations of PCE ranged from 3.4 to 92.4 µg/m3. Additional investigation activities conducted between May and June 2012 focused on indoor air sampling in both the D’s building and adjoining service station, and sub-slab sampling in the D’s building. Results of this assessment identified PCE sub-slab concentrations exceeding the 10X industrial ISV in the D’s building, and PCE indoor air concentrations in both the D’s and adjoining service station that exceeded the current industrial ISV. To date, the full extent and magnitude of soil, groundwater, and soil-vapor contamination has not been identified. Mitigation of Imminent Threat After reviewing the available data and revised ISV standards (ISVs were changed in 2014), MDH issued an expedited action determination for the site to evaluate immediate vapor intrusion risk to on-site building occupants and nearby residences. MPCA is currently working with the owners of the D’s and FLW buildings to install active mitigation systems. MPCA has also retained a multi-site contractor to

install sub-slab vapor points in seven nearby residences, and evaluate if soil-vapor intrusion is occurring at these properties. MPCA was informed by the city of Cloquet that sump discharge to the sanitary system is not allowed under city code. The matter has been referred to the Western Lake States Sanitary District (WLSSD) for regulatory oversight. Human Health Risks The presence of elevated levels of PCE in the soil gas in the vicinity of the D’s Fabric Care site constitutes a significant health risk. PCE has been detected in soil gas at levels more than 35,000 times the regulatory values for commercial properties in this area. Not only is this a potential soil vapor intrusion risk to the on-site buildings, but also to those who may need to excavate soil or work in areas below grade. The extent of on-site soil vapor contamination has not yet been fully determined, nor has the extent of soil vapor contamination to off-site receptors been defined. The risk of direct soil or groundwater exposure is not known because the extent and magnitude of soil and groundwater contamination is not known at this time. Conclusion Site investigation work has demonstrated the presence of elevated concentrations of PCE in the soil gas at the Site. Groundwater and soil vapor concentrations from samples collected at the Site indicate that PCE is present in groundwater and soil vapors at concentrations of regulatory concern. Additional investigation is necessary to determine the extent and magnitude of the release(s) and the source area(s). Soil vapor concentrations of PCE are high enough to warrant installation of vapor intrusion mitigation systems at the on-site buildings to mitigate the exposure potential. Additional sub-slab vapor sampling and mitigation work is needed to address potential vapor intrusion risks to off-site receptors. The D’s Fabric Care Site should be listed to the State PLP to perform additional investigation to determine the potential risks to receptors associated with the identified release and to determine any corrective actions, if necessary.

Figure 1: D's Fabric Care SR264

4/25/2016

Site Location

´

0

2,500

5,000

10,000 Feet

Figure 2: D's Fabric Care SR264 0

30

60

Cloquet Ave

4/25/2016

120 Feet

Cloquet Ave

3rd St

Frank Lloyd Wright Designed Gas Station (Best Oil)

D's Fabric Care (Cloquet Laundromat)

8.8 !. 92.4 !.

¬ « 33

3.4 !.

1,070,000 !. 4,020 !.

83.2 !.

30.8 !.

PCE Soil Vapor Values ug/m3=micrograms per cubic meter High : 1,070,000 ug/m3 Low : 3.4 ug/m3 (Residential Screening Value: 2 ug/m3) Historic Vapor Sampling Point

´

.!

Sampling Point & Concentration (ug/m3). These points are the extent of investigation activities.

DEPARTMENT:

DATE:

POLLUTION CONTROL AGENCY 5/2/2016

TO:

Sandeep Burman Manager Site Remediation and Redevelopment Section Remediation Division

FROM:

Crague Biglow Supervisor Site Remediation and Redevelopment Section Remediation Division

SF-00006-05 (4/86)

STATE OF MINNESOTA

Office Memorandum

Gregory Small Site Assessment Program Site Remediation and Redevelopment Section Remediation Division PHONE: SUBJECT:

651-757-2304 Permanent List of Priorities Listing Request West 66th Street and Vincent Avenue, Richfield (SA4586)

Minnesota Pollution Control Agency (MPCA) Site Assessment Program (SA) recommends referring the West 66th Street and Vincent Avenue Site in Richfield, (the Site) to the State Superfund program and listing it on the Minnesota Permanent List of Priorities (PLP). This will allow state funds to be used to conduct investigation activities and response actions. This Site is being referred to the MPCA Superfund program based upon the findings from