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J . H . KLEI N FELD ER & ASSOCIATES <br /> GEOTECHNICAL CONSULTANTS - MATERIALS TESTING <br /> ENVIRONMENTAL RESOURCES <br /> 4'4.XU�IVi\\1 \L 1.1)f.IVI %0914 1) <br /> \�l LA1�11 hll i l A'IS Xl- 1744 <br /> I ill 111.-1101 <br /> 1 <br /> May 21, 1987 <br /> File: 24-2058--1 <br /> Sacramento Equipment Maintenance, Inc. <br /> 2533 Connie Drive <br /> Sacramento, California 95815 <br /> Attn: Linda Steiger <br /> SUBJECT: Soil Sampling at AT&T Facility, 157 West Turner Avenue, <br /> Lodi, California <br /> Dear Ms. Steiger: <br /> The following is a brief description of the soil sampling program <br /> implemented on May 14, 1987 by Kleinfelder & Associates at the AT&T <br /> facility at 157 West Turner Avenue, Lodi, California. <br /> Briefly, the program consisted of collecting soil samples from an open <br />'• excavation that once contained a diesel tank and from the excavated soil <br /> adjacent to the original tank location. <br /> SAMPLING AND SCREENING PROCEDURE <br /> A backhoe was used to excavate relatively undisturbed soil from the open <br /> excavation. This soil was placed in a Mason jar and the head space was <br /> screened for petroleum hydrocarbon constituents with a photozonization <br /> detector (PID) . A sample was then collected for chemical analyses by <br /> driving a 6—inch brass tube into the soil in the backhoe bucket. <br /> In the open excavation sampling was performed along two vertical profiles <br /> on the opposite walls of the excavation. Samples were collected at depths <br /> of 8, 10, 12, 15 and 18 feet on each vertical profile. An additional <br /> isolated sample was collected at 15--foot depth. The samples submitted for <br /> chemical analyses were from the 12— and 18—foot sampling depths from each <br />' of the vertical profiles, and the isolated sample from 15 feet. Plate 1 <br /> illustrates the sampling locations in the open excavation. Table 1 lists <br /> the sample locations, PID screening results, and samples retained. <br />' From the excavated soil, four sampling locations were chosen to measure <br /> the head space with the PID and collect samples in a brass tube. At each <br /> location samples were collected at shallow, intermediate and deep depths. <br />' Table 2 lists the sample locations, PID screening results, and samples <br /> retained. Plate 2 presents the sampling locations from the excavated <br /> soil. From each of these sampling points, the sample with the highest PID <br /> Ireading was submitted for chemical analyses. <br /> l . \.uu1}ti d. S 0 K.n1un - K.1w . Slu.LI <br />