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kn KLEINFELDER r <br /> 2 BACKGROUND <br /> The Canlis Building (the Courthouse Annex Building) is located at 24 S. Hunter Street, <br /> Stockton, California (Plate 1). A 20,000-gallon underground diesel storage tank is located <br /> beneath the grass between the west side of the building and the S. Hunter Street sidewalk. The <br /> tank failed a tank test, and the remaining product was removed from the tank. <br /> The tank edge is approximately 5 feet from the west side of the building and less than 5 feet I <br /> C <br /> from the S. Hunter Street sidewalk. Due to the size of the tank, the size of the excavation that I <br /> 1 would be required to remove the tank, and the tank's proximity to the building and street, San i <br /> Joaquin County General Services is seeking approval to properly abandon the tank in place. <br /> SJCEHD requested a soil assessment in the vicinity of the tank prior to considering in-place <br /> closure. <br /> San Joaquin County" General Services retained Kleinfelder to prepare a work plan and conduct <br /> _ a soil investigation to assess the presence of petroleum hydrocarbons in the vicinity of the <br /> diesel storage tank. Kleinfelder submitted a work plan dated April 23, 1992 to SJCEHD to <br /> drill and sample three vertical borings adjacent to the tank. SJCEHD requested that four <br /> vertical borings and one angle boring be advanced adjacent to the tank. An addendum dated <br /> September 10, 1992 was attached to the work plan. The addendum included the additional two <br /> borings. This report presents the results of the soil assessment in the vicinity of the tank. <br /> i� <br /> ) <br /> t <br /> 1 <br /> 1 fff <br /> i <br /> FR8-92-211 Page 3 of 8 24-220191-A00 <br /> Copyright 1992 Kleinfelder, Inc. <br />