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• • Project No. 034-98179 Page No. 4 • During the boring process, soil samples will be subjectively analyzed for odor and discoloration. Additionally, the soil would be field screened with a portable photoionization detector (PID). The PID reading would be recorded on the soil boring log. The PID is a direct reading real-time analyzer that can detect most of the volatile hydrocarbon constituents present in the vapor phase of petroleum- affected soils. • Boring and sampling equipment will be decontaminated prior to arrival on-site, between each boring and/or sample depth, and prior to leaving the site. Drill cuttings (soil) and decontamination fluids will be temporarily contained in DOT- approved steel 55-gallon drums. CCB will properly dispose of decontamination fluids and stockpiled soil within 90 days following material generation. Krazan is not the generator of the decontamination fluids and soil cuttings and is not responsible for their proper disposal. Detailed field records will be developed to document the source and volume of the drill cuttings. The proposed drum storage area for the stockpile is shown on Figure No. 2. The PHC-impacted soil (if it is encountered) will be transported and disposed at a facility permitted by the State of California for recycling of PHCs. CCB understands that the cost of transporting and disposing(recycling)of PHC-impacted soil at a permitted facility (such as McKittrick Waste Treatment Site Class II Facility) will be approximately $50 per ton. Rinsate can been disposed for approximately $2 per gallon. These estimates do not include the cost for additional chemical characterization nor the cost for management and transport of the waste materials. • Soil borings would be backfilled with neat cement by tremie or equivalent means. • Field work would be conducted by individuals meeting the Occupational Safety and Health Administration requirements for hazardous waste work including 40- hour health and safety training and medical monitoring. The work would be completed under standards set forth by industry and deemed acceptable by various regulatory agencies. Hard hats, protective eyewear, steel-toe boots, protective clothing, and respiratory devices will be worn by field personnel when deemed appropriate by the field engineer or geologist present. • Findings will be summarized in a report which will be submitted to CCB and the PHS-EHD. Project Schedule The drilling will be conducted within five working days following approval of this workplan by the PHS- EHD. The PHS-EHD will be notified at least 48 hours in advance of the drilling date. It is anticipated that the field work will be completed in one day depending on subsurface conditions encountered. Analysis of soil and groundwater samples will be completed in approximately five working days following submittal to the laboratory. A report will be completed and submitted to CCB and the PHS- EHD in approximately ten working days following receipt of the analytical results from the laboratory. KRAZAN& ASSOCIATES, INC. Offices Serving the Western United States 03498179.LT1