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H . KwEINFELDER & ASS 0,al'ATES <br /> r . <br /> GEOTH-1INICAL CONSULTANTS . MATERIALS TESTING <br /> ENVIRONMENTAL RESOURCES <br /> 1ACKAMI Nti 1,(A')'h.27-1744 <br /> kN lbs ildr l,'OI <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, ? hest Turner Avenue, <br /> Lodi, California <br /> Dear Ms. Steiger: <br /> The following is a brief description of the soil sampling program <br /> s 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 /> fexcavation 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 /> r excavation. This soil was placed in a Mason jar and the head space was <br /> I screened for petroleum hydrocarbon constituents with a photoionization <br /> detector (PTD) . 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 /> E . 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 /> thehead 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 /> i 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 /> reading was submitted for chemical analyses. <br /> r <br /> T� rr1r 11K{1111[15:W'.dnpt t nh•l Srurnyvair ,. San ltaiu.rn • Rrrm �[ix Linn Inhnu • hidrlA OO <br /> Kohn.-,l Pmk Atrrr r•d Iw A%ekr. . 1.r+Vegas S1.C-09". Ukah <br />