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Kennedy/Jenks/Chilton <br /> Attachment A to Kennedy/Jenks/Chilton's <br /> letter to Mr. Ron Valinoti <br /> dated 13 October 1989 <br /> Surface Soils <br /> Task 4 - Additional Surface Soil Samoling <br /> To further define the areas with DDT in excess of the TTLC, 12 shallow <br /> surface soil samples will be collected from the areas near the warehouse <br /> building at the approximate locations shown of Figure WP-2. Samples will <br /> be collected in clean brass liners using a hand trowel to pack soil into <br /> the liner. The ends of the liners will be covered with a Teflon sheet <br /> and tight-fitting plastic cap. The caps will be secured with duct tape <br /> to prevent slippage during shipping. Samples will be labeled as to date, <br /> sample location, time, and initials of collector and shipped with <br /> completed chain-of-custody forms to Kennedy/Jenks/Chilton's Laboratory <br /> Division in San Francisco or another state certified laboratory for DDT <br /> analysis. The analysis will be performed using EPA method 8080 for <br /> determination of organochlorine pesticides. <br /> Task 5 Disposal of Soils Containing DDT at a Class I Landfill <br /> Soils with DDT concentration greater than 1 mg/Kg will be excavated to a <br /> minimum depth of 6-inches. The approximate area within the fenced <br /> portion of the yard to be excavated is shown on Figure WP-3. The area <br /> outside of the fenced portion of the yard to be excavated will be <br /> determined based on the results of the surface soil sampling conducted <br /> during Task 4. <br /> Construction activities will be conducted in a manner to minimize <br /> resuspended dust. Fugitive dust will be controlled using water when <br /> necessary. The excavated soil will be loaded into certified hazardous <br /> waste transport vehicles and transported to an appropriately permitted <br /> disposal facility. Soil shipments will be properly manifested. <br /> Prior to backfilling the excavation, a composite soil sample will be <br /> collected and analyzed for DDT to confirm that soils with DDT <br /> concentrations exceeding 1 mg/Kg have been removed. Soils will be <br /> collected using a pre-cleaned hand trowel or shovel and packed into a <br /> brass liner. The liner will be covered on each end with a Teflon sheet <br /> and plastic cap. The cap will be secured to the liner with duct tape. <br /> The samples will be labeled and placed in a chilled ice chest with chain- <br /> of-custody forms and shipped to the Kennedy/Jenks/Chilton Laboratory <br /> Division in San Francisco for analysis. <br /> WPNMLI:STOCKTON.WP2 A - 7 <br />