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,�► HORIZ __ N ENVIRONMEN SAL INC. <br /> Specialists in Site Assessment,Remedial Testing,Design and Operation <br /> February 8, 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. 076 <br /> 1030 South Olive Avenue, 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 Repo . <br /> The purpose of the investigation was to evaluate for the presence of possible gasoline fuel <br /> hydrocarbons in the soil during UST removal activities. Environmental field work was <br /> conducted on October 29, 1998 utilizing Horizon Field Methods and Procedures (included as <br /> Attachment A), and in accordance with the Horizon Site Safety Plan dated October 26, 1998. <br /> UST removal and soil excavation were performed by Walton Engineering (Walton) of West <br /> Sacramento, California. <br /> UST Removal and Sampling Activities <br /> The location of the Quik Stop market building, two former USTs, former dispenser island, <br /> and other pertinent site features are shown on the Site Plan (Figure 2). USTs T-1 and T-2 <br /> (from west to east), 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 unleaded gasoline and tank T-2 was reportedly used to store leaded gasoline. <br /> The pump dispenser island was located immediately adjacent to the south ends of the two <br /> USTs. On October 29, 1998, Ms. Letitia Briggs of the SJCPHS/EHD and Mr. K. Miller of <br /> the City of Stockton Fire Department were onsite to observe the UST removal and transport <br /> activities. Upon removal, the USTs appeared to be in very good condition with no <br /> 5011 Golden Foothill Parkway,suite 7 . El Dorado Hills,CA 95762 • (916)939-2170 • FAX(916)939-2172 <br /> P.O.Box 6283 • Bakersfield,CA 93388 • (805)589-8389 + FAX(805)589-1456 <br />