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GROUND ZERO ANALYSIS, INC. <br /> 1714 Main Street y t , , 12: 5 7 <br /> Escalon, California 95320-1927 <br /> Telephone: (209) 838-9888 <br /> Facsimile: (209) 838-9883 ENVIRONMENTAL HEALTH DIVISION <br /> 304 E. Weber Ave.Third Floor <br /> R O. Box 388, Stockton CA 95201-0388 <br /> Approved <br /> October 13, 1999 Denied ❑ <br /> Conditions <br /> Mr. Jeffrey Wong Date 1 f f 3 o 1,1,1 by <br /> San Joaquin County Public Health Services, qq <br /> Environmental Health Division <br /> 304 E. Weber Ave., 3rd Fl. <br /> Stockton, CA 95202 <br /> Subject: Harry's Auto Mart <br /> 2662 N. Wilson Way, Stockton, CA (Site Code: 1306) <br /> Workplan for Subsurface Investigation <br /> Dear Mr. Wong: <br /> We are writing on behalf of John and Maxine Ferraiolo to provide you with a workplan to <br /> investigate the extent of soil contamination and to determine if groundwater has been impacted <br /> from leaking underground storage tanks (USTs) at the subject facility. The location of the site <br /> is shown on Figure 1. A site plan is depicted on Figure 2. <br /> Background <br /> On April 12, 1989 four USTs (one 2,000 gallon, two 550 gallon and one 300 gallon) were <br /> removed from the subject site by North Cal Construction of Stockton, California. The contents <br /> of the USTs apparently had consisted of gasoline. One soil sample was collected from beneath <br /> each of the smaller USTs at depths ranging from 9 to 10 feet. Two samples were collected at <br /> depths of 11.5 feet from beneath the 2,000 gallon UST. In addition one soil sample was <br /> collected from a depth of 3 feet beneath a product line. The samples were submitted to State- <br /> Certified FGL Environmental Laboratories for analysis. Each sample was analyzed for total <br /> petroleum hydrocarbons (TPH) using modified EPA Method 8015; for benzene, toluene, <br /> ethylbenzene and xylenes (BTEX) and ethylene dibromide (EDB) by EPA Method 8020 and for <br /> total lead by EPA Method 7420. <br /> Elevated concentrations of TPH and BTEX were detected in the samples collected from beneath <br /> Tank #1, Tank #2 and the product line. No detectable concentrations of TPH or BTEX were <br /> hanyAworkplan <br />