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Project No. 034-17016 <br /> Page No.4 <br /> site located adjacent to the west of the subject site indicates that groundwater in the area of the subject site <br /> was first encountered at a depth of approximately 17 feet bgs in 2016. Groundwater monitoring <br /> conducted at the above-referenced site indicates that the groundwater flow direction in the vicinity of the <br /> subject site is toward the southwest. <br /> PROPOSED SUBSURFACE ASSESSMENT <br /> The objective of this project is to assess subsurface soil, soil vapor and groundwater in the area of the on- <br /> site fueling system/USTs/Dispensers, Truck Maintenance Shop/Trench Drains/Oil/Water <br /> Separator/Clarifiers/Sump and Truck/Trailer Wash Bay/Oil/Water Separator/Clarifiers/Sump (see Figure <br /> 2 for proposed boring locations). The scope of work for this investigation is discussed below. <br /> General <br /> 1. The Client will be contacted regarding access to the property and scheduling of fieldwork. <br /> 2. Krazan will prepare a site-specific health and safety plan (HASP). <br /> 3. A soil boring permit will be obtained from the San Joaquin County Environmental Health <br /> Department(SJCEHD). As required by the SJEHD,the SJCEHD will be present for the grouting <br /> of all borings. <br /> 4. Krazan will mark the proposed boring locations. The local underground utility alert service,USA <br /> North, will be contacted for marking of utilities. USA North marks to property boundaries as a <br /> matter of policy, and will not mark privately held property. Krazan will not be responsible for <br /> damage to equipment, personnel, utilities, or other property caused by encountering utilities that <br /> are not identified prior to subsurface exploration. <br /> 5. Site Safety protocol will be followed, including appropriate level of personal protection <br /> equipment. A proper exclusion zone will be maintained around each work area. <br /> 6. Krazan will implement industry standard methods and protocols for sample collection, sampling <br /> equipment decontamination, sample storage,transport,hold times,chain-of-custody, etc. <br /> 7. A limited geophysical survey(LGS) will be conducted using ground penetrating radar(GPR) and <br /> electromagnetic equipment to clear the proposed soil boring locations of subsurface utilities <br /> and/or structures. <br /> 8. Concrete coring will be completed where the soil borings must be drilled through concrete. <br /> 9. Soil borings will be advanced utilizing a truck-mounted drill rig using flighted auger, a truck- <br /> mounted and/or limited access Geoprobe rig equipped with direct push capabilities and/or hand <br /> auger equipment. <br /> 10. Soil boring logs will be completed in the field during drilling operations. The soils encountered <br /> will be continuously examined and visually classified in accordance with the Unified Soil <br /> Classification System. Evidence of contamination,if any,will be recorded on the soil boring log. <br /> 11. Field screening using a photoionization detector(PID) will be conducted to evaluate soil samples <br /> for the presence/absence of volatile COCs during sample collection and results will be recorded. <br /> 12. Soil and groundwater samples will be collected in laboratory-grade containers. Subsequent to <br /> sampling, the groundwater samples will be immediately placed in an iced chest. The samples <br /> KRAZAN&ASSOCIATES,INC. <br /> With Offices Serving the Western United States <br /> 034-17016 WP for LSA SSI Lathrop FINALAM <br />