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� ` �� � , <br /> � � � � �-�-�— a��7� � _._.��.-`� <br /> �. ����� , : � �`�'� � � <br /> r <br /> � � �- r�� <br /> �T� �y� ��� ����r�� M i n nes`ota Po! I ution Control Agency <br /> ��� � ,� �-,�f �. �.`� <br /> � � � <br /> ."J�1::R.:.i�:T �� ���' .:�� ���� <br /> �f� .�=.:� _ _-_'___�� <br /> f <br /> � �_ __"_.__ . .. -� <br /> /"tI <br /> (4 <br /> �� !.+l._- � <br /> June 29, 1993 <br /> � `J l;N` 3 0 ���� <br /> Mr. Don Morrison <br /> Sargent Hanagement Company <br /> 1300 TCF Tower <br /> Minneapolis, Minnesota 55402 <br /> Dear Mr. Morrison: . � <br /> RE: Petroleum Tank Release Site Closure <br /> Site: Estate of Elanor Pillsbury <br /> Site ID#: LEAK00005309 <br /> The Minnesota Pollution Control Agency (MPCA) Tanks and Spills (TS) staff has <br /> determined that the investigative and/or corrective actions performed in <br /> response to the petroleum tank release at the property referenced above (Site) <br /> has adequately addressed the petroleum contamination, and therefore the file <br /> regarding this release will be closed. Our determination is based upon the <br /> - data supplied in the "Remedial Investigation/Corrective Action Design" dated <br /> December 28, 1992. . <br /> On March 18, 1992, a petroleum tank release was reported to the MPCA. Since <br /> the discovery of the release, you have conducted the following investigative <br /> and corrective actions in response to the petroleum release: <br /> 1. A petroleum release was reported to the MPCA on March 18, 1992, when <br /> petroleum contamination was discovered during the excavation of a forears <br /> 540 gallon capacity leaded gasoline underground storage tank. It app <br /> that ths s�urce �f the petroleum contamination was from line leaks. <br /> 2. Soil samples collected below the former dispenser lines exhibited soil <br /> vapor �ar-headspace concentrations of 40 to 50 parts per million �PPm�'ards <br /> the time of the initial excavation activities, approximately 10 cubic y <br /> of contaminated soil was removed. Soil samples collected at the bottom of <br /> the excavation exhibited soil vapor jar-headspace concentrations of between <br /> 140 to 300 ppm. Soil samples collected for chemical analysis from the <br /> bottom of the excavation had detected total petroleum hydrocarbons as <br /> gasoline as high as 630 mg/kg. Water had entered the excavation and was <br /> reported to have a sheen present. A water sample was collected which <br /> detected petroleum constituents. <br /> MPCA Toli Frce 1-804-657-3864,Tdepiiw�e Dcvice for the Deaf(TDD)f+i2/297-5333.Greater Min�esote TDD 1-800-62�-3529 <br /> 520 Lafayette Rd.; St. Paul, MN 55155-4194; (612) 296-6300; Regional Offices: Duluth• Brainerd•Detroit Lakes• Marshall• Roches4er <br />