Short Elliott Hendrickson Inc. | 3535 Vadnais Center Drive | Saint Paul, MN 55110-5196 SEH is an equal opportunity employer | www.sehinc.com | 651.490.2000 | 800.325.2055 | 888.908.8166 fax

MEMORANDUM

TO: Michael Thompson, City Engineer at City of Maplewood, Minnesota FROM: Erin Borgschatz DATE: February 24, 2012 RE: Regulatory File Review Findings for TH36 & English Street Reconstruction SEH No. MAPLE 113910 14.00 Short Elliott Hendrickson, Inc. (SEH) completed a Phase I Environmental Site Assessment (ESA) in June of 2011. The Phase I ESA was intended to identify potentially environmentally impacted sites within a radius of between 500 and 1,250 feet from the initially proposed roadwork. After the construction limits were identified, SEH completed a file review of publicly available files at the Minnesota Pollution Control Agency (MPCA) and files obtained from the Minnesota Department of Agriculture (MDA) for the Trunk Highway (TH) 36 and English Street Reconstruction Project. The purpose of the review was to narrow the findings of the Phase I ESA and reduce the number of sites which justify a Phase II Investigation based on the construction limits for the project.

This memorandum summarizes pertinent information obtained during the MPCA and MDA file review. Recommendations regarding further investigation or special consideration during construction activities are provided at the end of this memorandum.

The following files were available and reviewed by SEH:

SEH ID File Name Location Regulatory File ID 1 Former Trugreen Chemlawn 1167 Highway 36 E Closed Leak site no. 13054 1 Trugreen/Chemlawn 1167 East Highway 36 Inactive Spill site no. 91-0006-I 1 Trugreen/Chemlawn - CF-10106 2 Asphalt Driveway Co 1211 Highway 36 E Closed Leak site no. 1538 2 Asphalt Driveway 1211/1221 East Highway 36 Closed Spill site no. 18800 3 Commercial 1259/1255 East Highway 36 Closed Spill site no. 27804 3 Kimro Oil - Mayflower Movers 1255 East Highway 36 Closed Spill site no. 18722 3 Mayflower 1255 East Highway 36 Closed Spill site no. 18639 4 Truck Utilities 2370 English Street Closed Spill site no. 18382 5 Berg Torgreth 2354 English Street Closed Spill site no. 20311 5 Jalmer Berg Site 2354 English Street Inactive VIC site no. VP5360 5 Berg Torseth Building 2354 English Street Inactive VIC site no. VP5361 7 Keller Lake Shopping Center Highway 61/Highway 36 Closed Leak site no. 503 8 Countryside Volkswagon 1180 Highway 36 E Closed Leak site no. 2534 8 Countryside Volkswagon 1180 Highway 36 E Closed Leak site no. 9106 9 Oasis Market Maplewood 1285 Cope Ave East Closed Spill site no. 67705

10 Hoffman Corner Oil No 12 2228 Highway 61 Closed Leak site no. 13001 11 Keller Lake Park Parking Lot CR B/Highway 61 Closed Spill site no. 63102 12 Xcel Energy English Street & Highway 36 Closed Spill site no. 69004 13 Northern Air Motel 2441 Maplewood Drive Closed Leak site no. 13885 15 Langer Leased Property 2390 English Street North Closed Leak site no. 16474

Regulatory File Review Findings for TH36 & English Street Reconstruction February 24, 2012 Page 2 Please use the previous table, as well as figures from the Phase I ESA (SEH June 1, 2011) in reference to the sites listed below. The “Site Location” and “Site Features” figures from the Phase I ESA are included as attachments. The following significant information was noted during the file review:

The former TruGreen Chemlawn (Soukup Realty Investment Partner) [1] is located at 1167 East TH 36. The MPCA leaking underground storage tank (LUST) file for this site indicates a diesel fuel release from an underground storage tank (UST) located on the north side of the site. Groundwater was not impacted and 593 cubic yards of soil was thermally treated on-site. According to the MDA Case File No. 91-0006, two (2) 10,000 gallon liquid fertilizer USTs were removed and soil sampling was completed on October 22, 1990. Sample results indicate total kjeldahl nitrogen (TKE), total phosphorous and nitrate - nitrogen present in on-site soils. These concentrations are below the MDA soil cleanup goals (MDA Guidance Document 19) for nitrate-nitrogen and TKE in the upper 2.5 feet of soil. Due to the low-level detections in soils immediately surrounding the tanks, the MDA concluded that additional investigation is not warranted. Based on the proposed work for this project, this location is not recommended for additional investigation.

Asphalt Driveway Company [2], 1211 East TH 36, is a closed LUST and Spills site. According to a 1994 Phase II Subsurface Environmental Assessment completed by MTM Environmental Inc., strong soil vapor readings (in soil from 20-60 feet bgs), and petroleum impacts and naphthalene (at the soil/groundwater interface at 60 feet bgs), were encountered on the southeast corner of the subject property directly adjacent to the TH 36 frontage road right-of-way (R/W). This is the location of a water main and utility trench line where two (2) diesel fuel spills occurred in 1993. Sample analysis was not completed in the upper 20 feet of soil. Additional investigation is warranted along the northern extent of the proposed roadwork adjacent to the Asphalt Driveway Company property.

Metcalf Mayflower [3], 1255/1259 East TH 36, is the location of a 35 gallon and 20-30 gallon diesel fuel spills. The 20-30 gallon diesel fuel spill was released to asphalt on the property and frontage road. The release was contained and additional investigation is not warranted. It is recommended, that environmental monitoring be completed during any excavation activities at this location.

Truck & Utilities [4], 2370 English Street, has had three (3) spills reported for the site. These small releases of hydraulic fluid on-site do not warrant additional investigation for proposed roadwork.

Vomela Specialty Company (former Modernistic Die Cutting / Maple Grove Manor / Berg-Torseth) [5], 2345 English Street, has a history of die cutting, screen printing, and beer casing waterproofing operations on-site. Volatile organic compounds (VOCs) were identified in soil and groundwater on-site during a Phase II Investigation completed in 1997 by MTM Environmental Inc. Groundwater was determined to flow west-southwest around 25 feet bgs. Approximately 1,000 cubic yards of VOC contaminated soil was excavated from the southeast portion of the site. Remediation activities were limited by the MnDOT right-of-way to the south. Further investigation is recommended for this location.

MnDOT Office of Materials [6], 1400 Gervais Avenue, was reported for 5 gallons of an unnamed substance released to a paved surface, which then drained to the storm sewer. Additional investigation is not recommended.

Menards (former Keller Lake Cleaners / Keller Lake Shopping Center) [7], 2280 Maplewood Drive, is a LUST site where a groundwater treatment building was installed to remediate petroleum impacts on-site. According to 1993 monitoring results by B.A. Liesch Associates, monitoring wells installed adjacent to (east of) the proposed road improvements (west of the Menards building) indicated benzene, toluene, ethylbenzene, xylene and gasoline range organics (GRO) present in groundwater. Additional investigation of this location is warranted.

Schmelz Countryside [8], 1180/1200 East TH 36, has a hydraulic lift within one of the structures on-site. During replacement of the lift, a release of hydraulic fluid was discovered. The leaking

Regulatory File Review Findings for TH36 & English Street Reconstruction February 24, 2012 Page 3

lift reservoir had a 30-40 gallon capacity. Further investigation is not warranted; however, environmental monitoring during excavation at this location is recommended.

Baby Zone (former Oasis Market 529 / Specific Family Chiropractic) [9], 1285 Cope Avenue East, was reported for a dripping fuel dispenser nozzle. This site is not recommended for additional investigation.

Keller Lake Convenience Store (Hoffman Corner Oil No 12) [10], 2228 Highway 61, has known petroleum impacts on-site. According to the Phase II Investigation and geotechnical borings completed by SEH in 2011, the petroleum impacts do not appear to extend north or east of the site. Gasoline and diesel impacted soil and groundwater were encountered in samples collected from borings located on the south and west side of the site. Groundwater was encountered at approximately 13 feet bgs and is expected to flow west-southwest. Adequate data was obtained from previous investigations and additional work for this location is not proposed.

Keller Lake Parking Lot [11], County Road B & Highway 61, is reported for a small diesel spill. Diesel was released from a truck to the asphalt parking lot surface. The spill was contained and cleaned up. This site is not a concern for the proposed roadwork.

English Street and Highway 36 R/W [12], had approximately 10 gallons of hydraulic fluid released to pavement from a truck. Additional investigation of this site is not proposed.

Northernaire Motel [13], 2441 Maplewood Drive, had minor impacts to soil reported when a fuel UST was removed from site. This site is not located adjacent to any proposed roadwork and additional investigation is not recommended.

Langer Leased Property [15], 2390 English Street S, is confirmed by the LUST file to be located on parcel identification number (PIN) 102922320004; this parcel is located immediately west of the mapped location in the Phase I ESA completed by SEH in 2011. Diesel and gasoline impacts are present in soil and groundwater on-site; naphthalene is present in groundwater. Groundwater was encountered at approximately 10 feet bgs and is expected to flow west-southwest. Proposed roadwork to the north, adjacent to the northwest quadrant of the site, may be a concern. Further investigation is warranted for this location.

In summary, SEH identified four (4) sites for further investigation and two (2) sites for environmental monitoring during construction. The additional investigations would consist of a drilling investigation, soil and groundwater sampling and analysis, and field screening. Expected results of the additional investigations include, but are not limited to, laboratory analysis provided to the contractor which allows for soils to be directly hauled to the landfill, quantities of contaminated soil can be estimated prior to construction, and lowered costs during construction.

Additional investigation and environmental monitoring are recommended for the following sites:

Asphalt Driveway Company [2], 1211 East TH 36 Vomela Specialty Company (former Modernistic Die Cutting / Maple Grove

Manor / Berg-Torseth) [5], 2345 English Street Menards (former Keller Lake Cleaners / Keller Lake Shopping Center) [7], 2280 Maplewood Drive Langer Leased Property [15], 2390 English Street South

Environmental monitoring during excavation activities is recommended for the following sites:

Metcalf Mayflower [3], 1255/1259 East TH 36 Schmelz Countryside [8], 1180/1200 East TH 36

Regulatory File Review Findings for TH36 & English Street Reconstruction February 24, 2012 Page 4 If you have any questions regarding this review please feel free to contact Mark Benson directly at 651.490.2194 or Erin Borgschatz at 651.490.2044. eeb Attachments s:\ko\m\maple\113910\environmental\16 phase ii investigation\36_english corridor phase ii\mpca file review_feb2012\letter report\file review findings memo 22412.docx

Site Location

3535 VADNAIS CENTER DR.ST. PAUL, MN 55110

PHONE: (651) 490-2000FAX: (651) 490-2150

WATTS: 800-325-2055www.sehinc.com

Project: MAPLE 113910Print Date: 06/01/2011

Map by: bpt/SrHProjection: Ramsey Co. (ft)Source: LMIC, Mn/DOT, SEHIncBackground: USGS 24k DRG

This map is neither a legally recorded map nor a survey map and is not intended to be used as one. This map is a compilation of records, information, and data gathered from various sources listed on this map and is to be used for reference purposes only. SEH does not warrant that the Geographic Information System (GIS) Data used to prepare this map are error free, and SEH does not representthat the GIS Data can be used for navigational, tracking, or any other purpose requiring exacting measurement of distance or direction or precision in the depiction of geographic features. The user of this map acknowledges that SEH shall not be liable for any damages which arise out of the user's access or use of data provided.

Figure1

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Site Location MapTrunk Highway 36 & English Street Reconstruction

PHASE 1 ENVIRONMENTAL SITE ASSESSMENTMaplewood, Minnesota

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3535 VADNAIS CENTER DR.ST. PAUL, MN 55110

PHONE: (651) 490-2000FAX: (651) 490-2150

WATTS: 800-325-2055www.sehinc.com

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Figure2Trunk Highway 36 & English Street Reconstruction

Maplewood, Minnesota

Map by: bpt/SrHProjection: Ramsey Co. (ft)Source: Mn/DOT, SEHInc, LMICBackground: 2010 DNR Imagery

Project: MAPLE 113910Print Date: 05/26/2011

This map is neither a legally recorded map nor a survey map and is not intended to be used as one. This map is a compilation of records, information, and data gathered from various sources listed on this map and is to be used for reference purposes only. SEH does not warrant that the Geographic Information System (GIS) Data used to prepare this map are error free, and SEH does not represent that the GIS Data can be used for navigational, tracking, or any other purpose requiring exacting measurement of distance or direction or precision in the depiction of geographic features. The user of this map acknowledges that SEH shall not beliable for any damages which arise out of the user's access or use of data provided.

5

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SEH ID Address Risk Environmental Concerns15 2390 English Street N Medium LUST16 Maplewood Dr/Highway 61 ROW Medium Potential Dumping Site17 2166 Maplewood Drive Medium UST, RCRA VGN18 1055 E Highway 36 Low RCRA VGN19 1065 E Highway 36 Low RCRA NLR, RCRA VGN20 1081 E Highway 36 Low RCRA NLR, RCRA VGN21 1175 E Highway 36 Low RCRA VGN22 1255 Cope  Avenue Low RCRA VGN23 1248 Cope  Avenue Low RCRA NLR24 1270 Cope  Avenue Low RCRA NLR25 1387 Cope  Avenue Low RCRA VGN26 1400 E Highway 36 Low RCRA NLR27 1261 E Highway 36 Low RCRA VGN28 ‐ Low Former Railway

SEH ID Address Risk Environmental Concerns1 1167 E Highway 36 High LUST, SPILLS, UST, AST, RCRA NLR, FED Other2 1221 E Highway 36 High LUST, SPILLS, UST, RCRA VGN3 1255/1259 E Highway 36 High SPILLS, UST, RCRA NLR, RCRA VGN4 2370 English Street High SPILLS, UST, RCRA SQG5 2345 English Street High VCP, SPILLS, UST, RCRA SQG6 1400 Gervais Avenue High SPILLS, UST, RCRA VGN7 2280 Maplewood Drive High LUST, SPILLS, UST, RCRA SQG, RCRA  VGN8 1180 E Highway 36 High LUST, SPILLS, UST, RCRA SQG, RCRA  VGN9 1285 Cope Avenue E High SPILLS, UST, RCRA VGN10 2228 Highway 61 High LUST, UST11 County Rd B/ Highway 61 High SPILLS12 English Street & Highway 36 ROW Medium SPILLS13 2441 Maplewood Drive Medium LUST, UST14 1145 E Highway 36 Medium RCRA  VGN

NLR ‐ No Longer RegulatedFED OTHER ‐ Sites regulated by the  Environmental Protection Agency

LUST‐ Leaking Underground Storage  TanksUST ‐ Underground Storage  TankAST ‐ Aboveground Storage  TankRCRAGN  ‐ Resource  Conservation and Recovery Act (RCRA) Hazerdous Waste  GeneratorSQG ‐ Small Quantity GeneratorVGN ‐ Very Small Quantity Generator