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1.0 EXECUTIVE SUMMARY At the request of George Bravante, in his capacity as the State Court Appointed Receiver of the Bridges Specialty Center, which is owned by Chi-Yuh and Po-Ying Chem, Capstone Remediation Corporation (Capstone) excavated soil beneath an elevator shaft on the property located at 2233 Grand Canal Boulevard, in the City of Stockton, California The excavated area consisted of one 9-foot by 6-foot area of hydraulic fluid-contaminated soil CRC Environmental Risk Management, Inc (CRC) provided oversight of the soil excavation under the guidance of the San Joaquin County Public Health Services (SJCPHS) Soil samples were obtained from the bottom of the excavation and analyzed for total petroleum hydrocarbons (TPH) as hydraulic fluid by Modified EPA Method 8015 to confirm that the contaminated soil has been removed to the extent technically feasible or practical The laboratory analytical results of the confirmatory soil samples indicate that the majority of the hydraulic fluid was removed and that negligible levels of hydraulic fluid were detected at the bottom of four (4) borings The remainder of the fifteen (15) soil augered areas showed non-detect levels of TPH A groundwater investigation followed this excavation work and was completed December 16, 1994 Three (3) groundwater monitoring wells were installed and groundwater samples were collected for analysis The results of the groundwater investigation showed non-detect levels of TPH as hydraulic fluid in all three (3) monitoring wells On the basis of the analytical results of the confirmatory soil samples, CRC concludes that the area identified with hydraulic fluid- contaminated soil has been properly excavated to the extent technically feasible or practical Additionally, the groundwater results indicate that the groundwater has not been significantly impacted by the soil contamination CRC recommends no further remedial actions at this site, and that a copy of this report be submitted to the SJCPHS for their concurrence 2.0 INTRODUCTION 2.1 History CRC conducted a subsurface investigation in February 1994 at 2233 Grand Canal Boulevard, in the City of Stockton, California, at the request of George Bravante in his capacity at the State Court Appointed Receiver of the Bridges Specialty Center which is owned by Chi-Yuh and Po-Yang Chem During this investigation, six (6) soil borings were drilled in the area where hydraulic fluid contamination was suspected from a leak in an elevator piston housing, which was buried in an uncased borehole at a depth of 13 feet The results of the investigation identified concentrations of TPH as high as 20,000 parts per million (ppm) in a soil sample taken at 6 feet below the bottom of the elevator pit Soil samples were also taken at depths of 10, 15 and 20 feet These samples had concentrations of 3,000, 120 and 7,500 ppm of TPH, respectively The hydraulic fluid was previously tested for the presence of polychlorinated biphenyls (PCBs) by Roy F Weston, Inc Laboratory analytical results showed that PCBs were not present in the hydraulic fluid An area approximately 9 feet by 6 feet was excavated to a depth of CRC Environmental Risk Management Inc Project N 3624-061-4 George Bravante Receiver 2233 Grand Canal Boulevard January 19 1995 1 Stockton,California