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13 <br />i Z4 VZO-3i i <br />Specialists in Site Assessment, Remedial Testing, Design and Operation <br />February 17, 1999 <br />Mr. Mike Karvelot <br />Quik Stop Markets Inc. <br />4567 Enterprise Street <br />Fremont, California 94538 <br />Subject: Tank Closure Report <br />Quik Stop Station No. 039 <br />2285 East Fremont Street, Stockton, California <br />Mr. Karvelot: <br />As requested, Horizon Environmental Inc. (Horizon) conducted soil sampling activities and <br />environmental oversight related to underground storage tank (UST) removal operations at <br />the above -referenced site (see Figure 1). Tasks included being present on the site to observe <br />removal of the existing USTs, collecting native soil samples as required by the San Joaquin <br />County Public Health Services/Environmental Health Division (SJCPHS/EHD), submitting <br />soil samples to a State -certified laboratory for the requested analyses, and the preparation of <br />this Tank Closure Report. <br />The purpose of the investigation was to evaluate for the presence of gasoline fuel <br />hydrocarbons in the soil during UST removal activities. Environmental field work was <br />conducted on November 12, 1998 utilizing Horizon Field Methods and Procedures (included <br />as Attachment A), and in accordance with the Horizon Site Safety Plan dated November 9, <br />1998. UST removal and soil excavation were performed by Walton Engineering (Walton) of <br />West Sacramento, California. <br />UST Removal and Sampling Activities <br />The location of the Quik Stop market building, two former USTs, the former dispenser <br />island, and other pertinent site features are shown on the Site Plan (Figure 2). USTs T-1 and <br />T-2 (from south to north), were both of single -walled, steel construction with 10,000 -gallon <br />capacities, and located in the middle area of the station property. Tank T-1 was reportedly <br />used to store leaded gasoline and tank T-2 was reportedly used to store unleaded gasoline. <br />The fill pipes and pump turbines were both located on the east ends of the former USTs. The <br />pump dispenser island was located 20 feet east of the eastern ends of the two USTs. <br />5011 Golden Foothill Parkway, Suite 7 • El Dorado Hills, CA 95762 • (916) 939-2170 • FAX (916) 939-2172 <br />P.O. Box 5283 • Bakersfield, CA 93388 • (805) 589-8389 • FAX (805) 589-1456 <br />