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!I <br /> f' June 23, 1993Al <br /> v <br /> r WALLACE • KUHL <br /> &ASSOCIATES INC. Mr. Peter Allen . <br /> Aronson Engineering 093 JUL -2 <br /> �', .! : 47 <br /> V <br /> 8609 McComber Street <br /> Sacramento, California 95824 <br /> SOILS SAMPLING AND TESTING <br /> 26485 THORNTON ROAD <br /> San Joaquin County, California <br /> WKA No. 2213.09 <br /> Introduction <br /> We have completed the observation, sampling and laboratory testing of soil <br /> exposed during the removal.of two underground storage tanks (UST) from the <br /> subject property. Two 1,400-gallon gasoline USTs were removed from the subject <br /> r. <br /> property on June 4; 1993 (Plate 1). <br /> The scope of our work included sampling and laboratory testing of soils obtained <br /> from the UST excavation, from beneath the former dispenser locations (P1-P3), <br /> �'-• Geotechnicsi Engineering <br /> and from'a location along the westerly sidewall of the excavation (SWI). <br /> �.f <br /> Emineerim,Ge6hx_,,: Additionally, four composite samples (STK1A-D) were obtained from the stockpile <br /> 14 <br /> of soil generated during overexcavation of the former USTs and dispenser <br /> \mss Environmental C unSulting <br /> locations. In.addition to the soil samples, two water samples were also obtained <br /> �eme'3iati,=n Services from,the excavation. All samples were obtained under the direction of Mr. Eric <br /> Trevena of the San Joaquin County Public Health Services Department. <br /> ,N Construction Inspection <br /> > ; Materials Train<; The UST excavation.samples were obtained by driving clean, two-inch diameter <br /> brass tubes'into soil taken from the sample locations with an backhoe bucket: <br /> The sample tubes were sealed with .polytetrafluoroethylene (PTFE)-coated sheets, <br /> 3050Inciustrial Blvd. <br /> cn_ plastic end caps and duct tape to reduce volatile hydrocarbon loss. The samples <br /> Wesr Sacramento ' <br /> were placed in an ice chest and submitted under chain-of-custody documentation to <br /> CA 95691 <br /> i a.California-certified laboratory. <br /> Fax 916.3772565 <br /> 916.372-143# <br /> - u <br />