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S E C O R <br /> Ms. Devra Lewis <br /> May 24, 2005 <br /> Page 2 <br /> collection of a groundwater sample from one of the existing wells at the former Chevron <br /> service station 9-8632 located at 575 West Grant Line Road (Figure 2). <br /> WORK ACTIVITIES <br /> The specific scope of work is described below. <br /> SITE SPECIFIC HEALTH AND SAFETY PLAN <br /> As required by the Occupational Health and Safety Administration (OSHA) Standard <br /> "Hazardous Waste Operations and Emergency Response" guidelines (29 Code of Federal <br /> Regulations Section 1910.120), and by California Occupational Health and Safety <br /> Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" <br /> guidelines (California Code of Regulations Title 8, Section 5192), SECOR will prepare, or <br /> modify the existing, site-specific health and safety plan (SHSP) prior to the commencement <br /> of fieldwork. Field staff and contractors will review the SHSP before beginning field <br /> operations at the site. <br /> GROUNDWATER SAMPLING <br /> A groundwater sample will be collected from one of the monitoring wells located on the <br /> former Chevron service station at 575 West Grant Line Road, Tracy, CA. Before sampling, <br /> the well will be purged of at least 3 casing volumes of water using a disposable bailer. <br /> During purging, the groundwater will be periodically monitored for the parameters of pH, <br /> electrical conductivity, and temperature. Purging will be considered complete when these <br /> parameters have stabilized within United States Environmental Protection Agency (EPA) <br /> guidelines. After purging, a groundwater sample will be collected using a disposable bailer. <br /> The groundwater sample will be placed in laboratory-supplied glassware, placed in a cooler <br /> with sufficient ice to maintain the internal temperature at approximately 4 degrees Celsius, <br /> and submitted under chain-of-custody record to a California State-certified laboratory for <br /> chemical analysis. <br /> SAMPLE ANALYSIS <br /> A groundwater sample collected for chemical analysis will be submitted to Lancaster <br /> laboratories Inc. (Lancaster). Lancaster is certified by the state of California (CA <br /> Registration No. 2116) to perform the requested analyses. The groundwater sample <br /> submitted for chemical analysis will be analyzed for total petroleum hydrocarbons (EPA <br /> Method 8015B) by GC/FID. The resulting sample chromatograms will be compared against <br /> standard chromatograms of coal tar, gasoline, kerosene (jet fuel), diesel #2, diesel #6, <br /> N:\Files\Projects\Chevron\Retail\#3-2792 Tracy Pipeline\REPORTS\2005 Chevron Pipeline Characterization Work Plan.doc <br />