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l <br /> APPLIED <br /> ENGINEERING APPLIED ENGINEERING,INC. <br /> 2905 OAK LEA TERRACE <br /> WAYZATA,MINNESOTA 553914533 <br /> FAX/TEL(612)939.9095 <br /> August 11, 1993 <br /> Ivan Bowen <br /> 430 Wakefield Rd <br /> Wayzata, MN 55391 <br /> RE: Underground Diesel Fuel Storage Tank Investigation, 430 <br /> Wakefield Rd, Wayzata <br /> Dear Ivan, <br /> As requested, Applied Engineering Inc. was at your site on <br /> 7/28/93 to investigate the soil from beneath the removed 80 gal <br /> underground diesel storage tank in accordance with MPCA <br /> guidelines, Sampling Requirements During Tank Closure February <br /> 12 , 1990, copy attached. <br /> Additionally, investigation was performed on the same date <br /> on a fuel oil tank that remains in use and is the subject of a <br /> separate report. No petroleum release was identified related to <br /> that tank. <br /> Removed Diesel Tank: <br /> The tank was located on the north side of the house where <br /> indicated on attached drawing. An inspection of the removed tank <br /> identified moderate oxidization and very little pitting. The <br /> tank was against the foundation wall. There were no visible <br /> holes in the removed tank. The native soil was sand, no <br /> groundwater was encountered. The tank reportedly was used as a <br /> fuel tank for a backup generator. <br /> Field methods included visual and olfactory senses as well <br /> as use of an HNU Photoionization Detector with an HNU Systems, <br /> Inc. , Model PI-101, portable photoionization detector (PID) , with <br /> a 10 .2 Ev lamp in accordance with the MPGA Jar Headspace <br /> Analytical Screening Procedure. Soil laboratory sampling <br /> followed MPCA' recommended procedures for total hydrocarbon <br /> analyses including cold storage until delivered to the <br /> laboratory. According to the laboratory, all analyses were <br /> performed using EPA or other accepted methodologies. <br /> There was a slight petroleum odor in some of the removed <br /> soil. Soil vapor samples were taken from the final excavation <br /> from the west, north, and east tank excavation sidewalls at 6 <br /> feet deep and from the tank bottom at 6 .5 feet deep resulting in <br /> vapor levels of 2 . 0, 0 .5, 4 .0, and 8 . 0 parts per million (ppm) <br />