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RPM- 2.0 SCOPE OF WORK The following work steps were performed between February 14 and March 12, 1991: ° Prepared a Site Specific Health and Safety Pian. ► Obtained all necessary permits. Drilled and logged three on-site soil borings at locations specified by Ultramar, Inc. Collected soil samples from the borings for State-certified laboratory analyses. 2.1 Site Specific Health and Safety Plan Prior to oil-site activities, Groundwater Technology prepared a Site Specific Health and Safety Plan (SSHSP) in accordance with the Occupation Safety and Health Administration (OSHA) standard "Hazardous Waste Operations and Emergency Response" (29 CFR 1910.120). The plan addressed the potential chemical and physical exposures to Groundwater Technology personnel could encounter while working at the site. Additionally, all personnel assigned to field operations were required to have completed the 40 hour health and safety training requirements under OSHA standards and to have reviewed and signed the SSHSP prepared for this investigation. 2.2 Soil Borings On March 11 and 12, 1991, three soil borings were drilled to assess subsurface conditions(Figure 2). The borings were drilled with a truck-mounted rotary drill rig using 8.25-inch outside diameter (O.D.) steam-cleaned hollow-stem augers. The drilling was supervised by a field geologist working under the direction of a State of California Registered Geologist. A continuous fog of materials encountered while drilling was completed by the field geologist(Appendix A). All soil generated during drilling was placed on plastic sheets pending the results of laboratory analyses. In accordance with Ultramar protocol,two of the soil borings, SB-1 and SB-3,were drilled to a depth of 36 feet below grade. SB-2 was drilled to a depth of 51 feet. The borings were backfilled with cement grout from total depth to surface. 2.3 soil Sampling Soil sampling was conducted in each boring at intervals of approximately 5 feet, beginning at 5-feet below grade and continuing to completion depth. Samples were collected using a 2.5-inch O.D. modified California split-spoon sampler lined with three, 2 inch-diameter by 6-inch-long brass sample tubes. Each sample was field screened for volatile hydrocarbons using a portable photo ionization detector (PID). The samples were sealed, capped, labeled, preserved on ice, and under chain-of- custody manifest,-were-submitted-to-Applied-Analytical Envir_onmenta! Laboratories- in Sacramento,California, Five soil samples from SB-2,and three samples each from SB-1 and SB-2 were selected for -W,GROUNDWATER 2 TECHyOLOCY