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Project No. 014-14075 Page No. 2 2. As required by the San Joaquin County Environmental Health Department (SJCEHD), Krazan will prepare a workplan that describes the site history and purpose and scope of the proposed investigation. The workplan will also include drilling and sampling procedures, laboratory analyses, boring construction/destruction methods, disposal of soil to be generated, a site map, and a HASP. Krazan will also complete and submit a Master File Record Information Form required by the SJCEHD. Finally, Krazan will prepare a permit application to complete the field work. The permit application, MFR and the workplan will be hand-delivered to the SJCEHD by the client. Please Note: the SJCEHD requires that if contamination is identified as a result of the investigation, the appropriate agency will be sent a copy of the hazardous waste discharge notification and the site will be so listed on the SJCEHD database. 3. Krazan will mark the proposed boring locations. The local underground utility alert service, USA North, will be contacted for marking of utilities. USA North marks to property boundaries as a matter of policy, and will not mark privately held property. Krazan will not be responsible for damage to equipment, personnel, utilities, or other property caused by encountering utilities that are not identified prior to subsurface exploration. 4. A geophysical survey will be conducted to "clear" proposed boring locations of underground utilities or other subsurface features. 5. Soil borings will be advanced using a hollow-stem auger(HSA) or solid-stem auger(SSA) drill rig or hand auger equipment. 6. PID field screening will be conducted to evaluate soil samples for the presence/absence of constituents of concern(CDCs)during sample collection and results will be recorded. 7. Site Safety protocol will be followed, including appropriate level of personal protection equipment. A proper exclusion zone will be maintained around each work area. 8. Krazan will implement industry standard methods and protocols for sample collection, sampling equipment decontamination,sample storage,transport,hold times,chain-of-custody,etc. 9. Three (3) soil borings will be completed in the area of the former generator pad to a depth of approximately 20 feet bgs (see Figure 1). Soil samples will be collected from each boring at depths of one(1),five(5), 10, 15,and 20 feet bgs. 10. Selected soil samples will be collected and analyzed by a State-approved laboratory for COCs as specified below. COCs investigated during the course of this assessment and their respective analytical methods include the following: • Total petroleum hydrocarbons carbon chain(TPH-cc)by EPA Method 8015C; • Volatile organic compounds(VOCs)by EPA Method 8260B for soil; and • CAM 17 Metals by EPA Method 6010. 11. Each soil sample will be analyzed for hydrocarbons by TPH-cc. The sample with the highest TPH-cc in each boring will also be analyzed for VOCs and CAM 17 metals. 12. Two (2)grab soil samples will also be collected from the existing on-site soil piles and analyzed for TPH-cc, VOCs and CAM 17 metals. 13. If field screening indicates that hydrocarbon-impacted soil extends below 20 feet bgs, the soil borings will be extended until at least two (2) successive PID readings at five (5)-foot intervals indicate that the soil samples are not impacted by hydrocarbons. In any case,the soil borings will not extend below groundwater. 14. If groundwater is encountered during drilling, a grab groundwater sample will be collected from each boring where groundwater is encountered and analyzed for TPH-cc, VOCs and CAM 17 metals. KRAZAN&ASSOCIATES,INC. With Offices Serving the Western United States 014-14075 San Joaquin Hospital French Camp Workplan FINAL