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. Mr Mike Infurna Project 20805-224 002 <br /> April 26, 1999 <br /> Page 3 <br /> to two feet laterally and sax feet vertically in the product line areas and will not extend <br /> deeper than a total depth of approximately 17 feet in the UST areas The excavated soil is <br /> proposed to be stockpiled at the location shown on Figure 1 <br /> • The anticipated length of areas to be overexcavated for product line removal and <br /> replacement will be approximately 100 to 120 feet The actual length along the <br /> piping trenches may vary based upon observed impacts and results of field <br /> screening <br /> • The anticipated volume of material to be removed from beneath the piping <br /> trenches is 60 cubic yards This volume is typical for recent piping and dispenser <br /> replacement activities at other ARCO facilities <br /> • The excavated soil will be characterized for disposal and the analytical results <br /> will be evaluated to determine the appropriate, ARCO-approved, disposal <br /> facility In the event that total petroleum hydrocarbons as gasoline (TPHG) are <br /> less than 100 parts per million (ppm), the disposal facility may be either <br /> Redwood Landfill or BFI Vasco Road Landfill In the event that TPHG <br /> concentrations exceed 100 ppm the soil will be transported to TPS located in <br /> Richmond, CA Dillard Trucking, of Byron California, the ARCO transportation <br /> contractor, will submit profiling and disposal applications to the appropriate <br /> facility and transport the soil for proper disposal <br /> • The anticipated volume of material to be removed from beneath the USTs is up <br /> to 800 cubic yards This volume is typical for recent UST replacement activities <br /> at other ARCO facilities The excavated soil from the UST locations will be <br /> stored onsite and characterized for either proper disposal or, pending County <br /> approval, reuse as backfill material <br /> • A site plan (Figure 1) showing the piping layout and proposed locations for soil <br /> stockpile and other pertinent site features is attached <br /> Reporting <br /> Pinnacle will prepare a report summarizing the product delivery line, dispenser and UST <br /> removal and replacement activities, including verification soil sampling results Copies of <br /> the certified analytical reports will be appended <br /> • <br /> CP\E 1ARC0\6020\REP0R'i W020P203 DOC-95 isg 1 <br />