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..d ng ADDENDUM A I NVIROMENTAE HEALTH The purpose of this addendum is to clarify some points in t e R" J33le�KV(CE$ submitted to the San Joaquin County Health District by Canonie Environmental Services Corp. (Canonie) on behalf of Southern Pacific Transportation Com- pany (SPTCo. ) . The workplan outlines the regulations and procedures to be followed while performing the work necessary to remove underground storage tanks from two locations in Stockton, California. Unless site conditions change, the following clarifications will be followed: Canonie will notify all local officials responsible for underground tank programs at least 48 hours prior to the commencement of field operations. Following the procedures outlined in Section 2.3 of the workplan, the on-site representative from the health department will obtian soil samples at least one foot below the backfill material, under the fill pipe and bung. Additional samples will be collected as needed from under the tank, from the area below each joint of the tank piping, and one sample for every twenty lineal feet of piping. A modified EPA Method 8015 will be used to analyze samples for Total Petroleum Hydrocarbons (TVPH) . Based on the results of the soil sample analyses, the field engineer, in consultation with the health department, will make a decision about the need for additional excavation as well as alternative or future remedial actions. Following the procedures in Sections 2.2 and 2.4 of the workplan, the tanks will be rendered inert by adding dry ice at a minimum of 15 pounds per 1,000 gallons of tank volume. SPTCo. will be responsible for removing and disposing of all product from the underground storage tanks and product lines. If a tank has not been emptied, a licensed removal and transportation contractor will be brought to the site for removal and disposal of the tank contents. PFS Waste Control Services, Inc. (PFS) , EPA #CAD98116445, DHS #704144 will triple-rinse the tanks on-site. The rinsate will be containerized in 55-gallon drums and transported as manifested hazardous waste to an approved TSD facility or a Class 1 landfill. The cleaned tanks will be transported to a scrap yard under a bill of lading, and a certificate of destruction will be acquired for each tank. CanomeEnvironmental