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TANK REMOVAL REPORT <br /> 814 East Hazelton <br /> Stockton, California <br /> 1 .0 INTRODUCTION <br /> Hoblitzell & Associates retained Upgradient Environmental <br /> Consultants in November of 1994 to witness the removal of a 1000- <br /> gallon diesel tank from the property located at 814 East Hazelton <br /> Street in Stockton, California (Figure 1) . The tank had not been in <br /> use for many years and the owners of the property have no record of <br /> its installation. The tank removal application was approved by the <br /> San Joaquin County Public Health Service, Environmental Health <br /> Division, in February, 1995 . The removal was performed on March 6, <br /> 1995, by Stokely Construction of Tracy, California. <br /> 2 .0 TANK REMOVAL <br /> Figure 2 shows the location of the tank. It was located in the <br /> northwest corner of the property, adjacent to a factory (816 East <br /> Hazelton) . It was certified safe for removal by an Assistant Fire <br /> Marshall of the Stockton Fire Department at approximately 11 : 30 a. <br /> M. The tank was removed with a backhoe, cleaned, and examined. The <br /> tank was slightly rusted, but no holes were observed. It appeared <br /> to be in good condition. <br /> 3 .0 SOIL SAMPLING <br /> After removal, the backhoe operator excavated to a depth of <br /> approximately 10 feet to expose fresh soil. One soil sample was <br /> collected from each end of the excavation. The samples were <br /> collected from the backhoe bucket with a slide hammer soil sampler <br /> and screened for volatile organic vapors with a Microtip HL2000 <br /> photo-ionization detector prior to being capped, sealed, labelled, <br /> and placed in a cooled ice chest. One sample was also collected <br /> from the excavated soil stockpile. Figure 2 shows the sample <br /> locations . <br /> 4 .0 FIELD OBSERVATIONS <br /> Soil in the excavation was medium to dark brown in color and moist, <br /> but groundwater did not enter the excavation during removal or <br /> sampling. No organic vapors or, soil discoloration were observed or <br /> detected by the photo-ionization detector, nor was any petroleum <br /> observed coating the tank. <br /> 5 .0 LABORATORY RESULTS <br /> The samples were transported under chain of custody to Sparger <br /> Technology in Sacramento and analyzed for Total Petroleum <br /> Hydrocarbons as gasoline, BTEX, and total lead. As shown on the <br /> attached laboratory report, neither gasoline nor BTEX were detected <br /> in any of the samples . Total lead concentrations in the excavation <br />