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„ ,- � � v <br /> 1. H.KLEINFELDER &ASSOCIATES <br /> j.^ File: 24-2045-2/29:795 <br /> December 33, 1986 <br /> Page 1 <br /> 1.0 INTRODUCTION <br /> The following is a work plan to perform a second phase soil and ground <br /> water investigation at the A. Teichert and Son, Inc. facility in Stockton, <br /> California. The purpose of the investigation is to assess the lateral and <br /> vertical extent of petroleum hydrocarbon migration in the soil, and to <br /> assess possible water contamination adjacent to an underground fuel <br /> storage tank as requested by the San Joaquin Local Health District. <br /> 2.0 .BACKGROUND <br /> The A. Teichert & Son, Inc. facility is located at 103 North E. <br /> Street, Stockton, California, as shown on Plate No. 1. Soil tested <br /> beneath two removed underground gasoline storage tanks indicated the <br /> presence of gasoline related products at a depth of approximately 16 <br /> feet. <br /> On December 9th and 10th, five soil borings were drilled in the area <br /> adjacent to and surrounding the removed tank location. Selected soil <br /> samples were submitted for chemical- analysis from all borings. Total <br /> pet-oleum hydrocarbons were detected at relatively significant <br /> concentrations in boxings B-1 and B-5. The data indicate a storage tank <br /> and/or associated piping has leaked fuel into the adjacent soil. <br /> 3.0 SCOPE OF WORK <br /> s. 3._1_ Drilling of Soil Boring <br /> A .series of soil borings will be drilled along lines radiating away <br /> from the underground fuel, storage tank in an attempt to ascertain '-die <br /> vertical and horizontal rAtent of soil contamination. The initial soil <br /> boring for each radial line will be placed at approximately 10 foot <br /> intervals away from the underground tank. Soil samples will be collected <br /> at 5 foot intervals starting at a depth of 10 feet below the ground <br /> surface down.to 5 _`eet above the ground water table (approximately 35 feet <br /> below the ground surface). If the presence of petroleum hydrocarbons is <br /> indicated in the initial soil boring, the next -oil boring will be drilled <br /> 10 feet further away from the storage tank along each radial line. The <br /> soil borings will be drilled at 10 foot intervals along each radial line <br /> until a soil boring is drilled in which petroleum hydrocarbons do i.ot <br /> 4 <br />