Laserfiche WebLink
I <br /> 1 . 0 INTRODUCTION <br /> 1 . 1 BACKGROUND <br /> A 1 , 000-gallon unleaded gasoline underground storage tank ( UST) , piping and dispenser <br /> _I island were removed from the property at 2050 W. Fremont Street in August 1992. The <br /> results of tank closure and soil sampling were published by Kroeker Environmental Services <br /> -1 on August 27, 1992. <br /> Earth Tech was not present during the excavation , tank removal , and subsequent sampling. <br /> -1 The owner of the property at the time reported that the tank appeared to be in good <br /> condition. <br /> Samples collected from the bottom of the tank excavation by Twinings Laboratory <br /> indicated residual hydrocarbons in the soil, as summarized in Table 1 . <br /> [' <br /> TABLE ! <br /> Results of SoH Analysis Sampled Collected 8/20/92 ' <br /> SOIL SAMPLE DEPTH STEX (ug/kg) TVPH-GASOLINE MTBE (ug/kg ) <br /> w (FEET) (ug/kg) <br /> S- 1 (North Bottom) 11 None Detected None Detected Not Analyzed <br /> ,._ S-2 (South Bottom) 11 Benzene - ND 600 Not Analyzed <br /> Toluene - 37 <br /> Ethylbenzene - 46 <br /> Xylenes - 85 <br /> CS- 1 ( Stockpile) — None Detected None Detected Not Analyzed <br /> 8 <br /> ' Source : Kroeker, 1992 <br /> 1 .2 SCOPE OF WORK <br /> The San Joaquin Public Health Services/Environmental Health Division (PHS/EHD ) requested <br /> a subsurface investigation be performed to evaluate the extent of petroleum impacted soil <br /> from the former UST, evaluate the need for remedial action , and to provide data that may <br /> be used for site closure . <br /> A detailed scope of work was presented in Earth Tech ' s Work Plan for Additional <br /> Subsurface Investigation in the Vicinity of the Former 1, 000-gallon Gasoline Tank at the <br /> National Advertising Company Facility, 2050 W. Fremont Street, Stockton, CA 95205, <br /> included in Appendix A . The proposed scope of work was approved by the PHS/EHD on <br /> j February 12 , 1998. <br />