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GEOMATRIX excavation; (2)the soil should not be placed shallower than 2 feet bgs unless covered by Pavement. If it cannot be reused in the subsurface or underneath surface coverings, the oil- affected soil should be stockpiled separately from non-affected soil excavated at the site, and Chevron will handle the disposal of the oil-affected soil (see contact list on last page). .. Standard industry practice should be used for dust and erosion control of the stockpiled soil. The San Joaquin County Air Pollution Control District does not require a permit to stockpile this soil. If oil-affected soil is disposed of off site without Chevron's prior knowledge, Chevron will not be responsible for any cost or liability associated with such disposal. In addition, it is important to consult with the disposal facility regarding potential restrictions for accepting soil affected by petroleum hydrocarbons. DEWATERING OPERATIONS If excavation or utility repair/replacement activities require dewatering the subsurface soil near V or in areas that contain affected soil, Chevron should be contacted before the start of dewatering activities to discuss potential issues regarding this activity. Chevron will review the dewatering plan and provide assistance, as necessary, to ensure that discharge water meets applicable regulatory requirements. HEALTH AND SAFETY ISSUES Based on the Dividend risk assessment and comparison to U.S. EPA PRGs, the oil-affected soil :, does not pose an unacceptable risk to human health or the environment. Construction workers or others who encounter and handle oil-affected soil do not require any specific health and safety training above standard requirements for performing their job. The oil-affected soil may i`. have a petroleum odor that dissipates over time, and the odor may cause temporary side effects (such as nausea, headache, etc.). If workers voluntarily choose to use air purifying respirators rather than dust masks to avoid these nuisance odors, workers must be trained, and fit-tested, and must generally comply with California OSHA, CCR Title 8 Section 5144 and federal OSHA, 29 CFR 1910.134. PROPOSITION 65 EVALUATION Chemicals identified under California's Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65)known to cause cancer and/or reproductive toxicity have been identified 1� in soil at the site. However, based on the results of the Dividend risk assessment and comparison to U.S. EPA PRGs, the soil conditions at the Dobler property pose no significant I:1Doc_Safc13400s13499L3499.00S\soil rtmgnt plan.doc 4 Lo