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Mr. Roben McClellon September 22, 2004 Page 3 of ll Soil samples were collected at 5 to 10-foot intervals for soil characterization, subjective evaluation of hydrocarbon contamination using a photoionization detector (PID), and possible laboratory analyses. Soil samples collected at depths of approximately 10 and 20 feet bgs from each boring were submitted to State-certified Argon Laboratories (ELAP #2359) for analysis. In addition, the soil sample collected from 30 feet bgs in boring SB2 was also submitted for analysis because boring SB2 was located in an area of greatest thickness of landfill material.Soil samples were temporarily stored in an ice chest refrigerated to a temperature of approximately 4o C and delivered under chain of custody protocol to Argon Laboratories (ELAP #2359). Discrete groundwater samples were collected through a temporary well screen installed in each boring.A new well screen was installed in each boring to avoid potential cross contamination issues.The water samples were drawn to the surface using a length of small-diameter polytetrafloroeduylene (PTFE) tubing with a stainless steel check valve. Samples were temporarily stored in an ice chest refrigerated to a temperature of approximately 4° C and delivered under chain of custody protocol to Argon Laboratories. After sampling, the borings were grouted from the bottom of the boring to due ground smface using neat cement grout. Copies of boring logs axe contained in Appendix A. 2.2 Laboratory analysis Soil samples selected for analyses were analyzed by Argon for total petroleum hydrocarbons as oil TPHO) using EPA method 8015 modified, CAMI7 metals, and soluble lead. TPHo and soluble lead was not detected in any of die samples analyzed.Many CAM 17 metals were detected, but adl were at levels well below the preliminary remedial goals and hazardous waste designation levels.Analytical results are summarized in Table 1, and a copy of the laboratory report including chain of custody documentation is included in Appendix B. Groundwater samples were analyzed by Argon for TPHQ, volitile organic compounds (VOCs) by EPA 8260, and soluble lead.All of the analytes sampled were below the laboratory detection limits.Groundwater analytical results are summarized in Table 2 and a copy of the laboratory report including chain of custody documentation is included in Attachment B. 2.3 Discussion of Results Laboratory analyses of soil samples collected beneath the waste buried at the site contained no metals or petroleum hydrocarbons as oil (TPHO) at levels exceeding Preliminary Remedial Gods PRGS) established by the United States EPA or the State of California.No TPHO, antimony, arsenic, beryllium, cadmium, selenium, silver, or thallium were detected above the laboratory detection limits.Barium chromium, cobalt, copper, lead, molybdentun, nickel, vanadium, and zinc were present at levels considered at or below background levels in San Joaquin County Dragun and Chiasson, 1991) and at levels one to two orders of magnitude below established PRGs.In addition, no soluble lead was detected in any of the soil samples analyzed. G:\GROUNDZE\Pa1omino\wp_sitemitHnaI.doc