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A LI California Regional Water Quality Control Board 15365 January 30, 2003 Page 4 SCOPE OF WORK The following tasks will be conducted to complete the assessment activities. Prepare a Site Health and Safety Plan (HASP). As required by the Occupational Health and Safety Administration (OSHA) Standard Hazardous Waste Operations and Emergency Response guidelines (29 CFR 1910.120) and by the California Occupational Health and Safety Administration (Cal-OSHA) Hazardous Waste Operations and Emergency Response guidelines (CCR Title 8, Section 5192), a site-specific HASP will be prepared and reviewed by Hart Crowser field personnel prior to the initiation of field activities. Permitting. Boring permits are not required from the San Joaquin County Environmental Health Department(SJCEHD) for the proposed test pits (personal communication with Margaret Lagorio, SJCEHD). Notifications. Underground Services Alert (USA) will be contacted at least 72 hours in advance of field work initiation to allow local utilities the opportunity to identify subsurface utilities in the vicinity of the proposed work. In addition, Hart Crowser will work closely with ST Services facility staff and available facility blueprints to identify underground utilities and/or pipelines. If deemed necessary and appropriate, a private utility locator may be retained to identify subsurface utilities. In addition, Hart Crowser will provide the RWQCB and SJCEHD a minimum of 48 hours notice of the scheduled fieldwork. Test Pits. Hart Crowser will retain an earthwork contractor to advance shallow test pits near AST No. 3302 using a backhoe. The ground surface has been paved with approximately 6 inches of gravel in the area of the proposed test pits. Therefore, the top gravel layer will be scraped off at each test pit location and placed adjacent to the test pit. The test pits will then be extended to a depth of 2 to 3 feet. Soil removed from the test pits will be retained in the backhoe bucket and field screened for the presence of separate phase product using visual observations, a photo-ionization detector(PID), and sheen testing. To conduct the sheen testing, a small volume of soil will be placed in a glass jar with a small volume of water. The jar is then agitated and inspected for the presence of a sheen on the added water. PID measurements will be collected by placing a small volume of soil in a jar and sealing the jar with aluminum foil and a cap. The jar is then allowed to achieve ambient temperatures before Hart Crowser removes the cap and collects a headspace measurement of volatile organic compounds by pushing the PID