FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

• Preliminary Environmental Assessment Report Pittman Elementary School,Stockton,CA December 10,2003 Page 7 • The soil vapor and groundwater samples were analyzed for volatile organic compounds (VOCs). The soil gas samples were shipped under chain-of-custody procedures via overnight carrier to Air Toxics Ltd. in Folsom, California, for analyses. The groundwater samples were shipped in a cooler chilled with Blue Ice under chain-of-custody procedures via overnight carrier to Severn Trent Laboratories, Inc. in Arvada, Colorado, for analyses. A travel blank was prepared and submitted with the groundwater samples for analyses. Upon completion of the drilling and sampling, the borings were grouted with cement slurry containing three to five percent bentonite. The sampling equipment was cleaned prior to collecting each sample. The cleaning procedures consisted of washing in a solution of laboratory-grade, non-phosphate detergent and deionized water, and double rinsing with deionized water. 5.6 POLYCHLORINATED BIPHENYLS SAMPLES Discrete surface and subsurface soil samples were collected from two locations around each of the four electrical switching stations (transformers) and the Pacific Gas & Electric substation. Second discrete samples (T4-S and T4-D) were collected from the same sampling location as T3-S and T3-D for quality assurance/quality control purposes. The surface samples were analyzed for polychlorinated biphenyls (PCBs). The deeper discrete subsurface samples were archived frozen by the laboratory pending analytical results of the surface samples. The sample locations are shown on Figure 7,Appendix A. The surface (0 to 6 inches) and subsurface (2.0 to 2.5 feet) samples were collected using a stainless steel hand auger and transferring the soil directly from the hand auger into laboratory-supplied glass jars. Each sample container was labeled for sample identification and placed in a cooler chilled with ice. The stainless steel hand augers were decontaminated in the field with a solution of laboratory-grade, non- phosphate detergent and deionized water and rinsed with deionized water prior to use at each surface and subsurface sample location. The equipment blank sample was collected following soil sample collection and subsequent decontamination by running deionized water through the sampling equipment and collected the water in laboratory-supplied containers. The samples were shipped in a cooler chilled with ice under chain-of-custody procedures via overnight carrier to Severn Trent Laboratories, Inc. in Arvada, Colorado, for analyses. 5.7 HYDRAULIC ELEVATOR SAMPLE A product sample was collected from the hydraulic oil spilled on the concrete floor of the control room adjacent to the elevator located in the warehouse building (Figure 2, Appendix A). The sample was collected by scraping the product from the floor and placing the sample in a laboratory-supplied glass jar. Prior to sample collection, the scraper was decontaminated with a solution of laboratory-grade, non- phosphate detergent and deionized water and rinsed with deionized water. The sample was shipped in a cooler chilled with ice under chain-of-custody procedures via overnight carrier to Severn Trent Laboratories, Inc. in Arvada, Colorado, for PCB analysis. 6.0 LABORATORY ANALYSES 6.1 LAWN AREA SAMPLES Fifteen discrete surface samples and one discrete subsurface sample collected at the site were analyzed for organochlorine pesticides by EPA Method 8081A. Five discrete surface and two discrete subsurface samples collected at the site were analyzed for CAM 17 Metals by EPA Methods 6010B and 7471A. Four discrete surface and two discrete subsurface samples collected at the site were analyzed for arsenic • by EPA Method 6010B. In addition, four discrete surface and two discrete subsurface samples were also W CONDOR