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b/ sealed with Teflon paper or foil and plastic endcaps, labeled, logged onto chain-of-custody forms and place in a chilled ice chest on crushed ice for transport to the laboratory. The boreholes will be continuously logged using the Unified Soil Classification System under the supervision of a professional geologist. Additional lithologic information will be collected as needed to describe the subsurface geology. Soil samples will be field screened with a portable photoionization detector(PID) for petroleum fuel hydrocarbon vapor and staining. Upon completion of the borehole drilling and collection of water samples, the boreholes will be backfilled with grout, placed from the bottom to top of the borehole per the permit requirements. 3.1 Field Methods - Groundwater Sampling from Open Boreholes Groundwater samples will be collected from each borehole. A brief summary of these procedures follows: Each borehole will be advanced into the aquifer and temporarily cased for sampling. Depth to groundwater measurements will be made in the borehole to the nearest one- one hundredth of one foot from surface grade, and also checked for the presence of separate phase product. The water entering the borehole will be sampled using a clean disposable PVC bailer, and carefully poured into the appropriate laboratory prepared container with minimum cavitation. Each water sample will be labeled, logged onto a chain-of-custody form, and placed in a chilled ice chest on crushed ice for transport to the laboratory. All soil cuttings, decontamination and cement mixing water and consumable items used in sampling will be left in labeled 55-gallon closed top drums. The drums will be left at the Client- specified location. 5.0 Chemical Analysis Up to ten (10) soil samples will be analyzed at Kiff Analytical LLC, a State-certified analytical laboratory in Davis, California. All samples will be tested for the following; Total Petroleum Hydrocarbons as Gasoline (TPHG) and Diesel (TPHD), Benzene (B), Toluene (T), Ethylbenzene (E), Xylene (X), using EPA Methods 3510/8015, and 8260/8260B. The analyses will be performed and a"normal"ten-day turnaround. 6.0 Report A summary report of the findings of this site investigation will be prepared for submittal to the City and PHS/EHD and RWQCB Region 5. The report will include the field methods, permits, exploratory boring logs, chemical analytical data, site map, geologic cross section, a brief site conceptual model and report narrative on subsurface conditions and contaminant extent and the need for further work. The PHS/EHD will review the results of this study and need for groundwater monitoring well installation and quarterly monitoring for this site. The reports will be prepared in both hard copy, and electronic format for submittal to the Geotracker system.