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procedures will govern until final disposition of the samples. This information will be recorded on the Chain <br /> of Custody form which will remain with the samples at all times. Proper taping, locking, and sealing <br /> procedures shall be used to prevent or detect tampering of the samples. The Chain of Custody form(s) will <br /> be used for a packaged lot of samples (i.e., more than one sample will most likely be recorded on a single <br /> form). If all of the samples in a given lot cannot be recorded on a single Chain of Custody form, an <br /> additional form(s) will be used. <br /> WASTE DISPOSAL PLAN <br /> This section provides guidelines for the handling of any potentially contaminated materials generated during <br /> the field activities associated with this investigation. <br /> All excess soils brought to the surface will be stored in DOT-approved drums. Because the subsurface <br /> probe does not generate drill cuttings, the volume of excess soil is anticipated to be minimal. The drum(s) <br /> containing the soil will be labeled with the site name, borehole numbers, date, and nature of contents. All <br /> drums will remain on-site until analytical results are obtained from the analytical laboratory. The soils will <br /> be appropriately disposed based on the analytical results. <br /> The water used for decontaminating sampling equipment will be stored on-site in sealed DOT-approved 55- <br /> gallon drums. The drums will be labeled with the site name, date, and nature of the contents. All drummed <br /> liquids will be sampled and properly disposed of based on the analytical results. <br /> California Uniform Hazardous Waste manifests will be completed by PG&E as required for the transportation <br /> and disposal of any hazardous waste that may be generated during the investigation. Disposal of all waste <br /> will be conducted in accordance with federal, state, and local regulations. <br /> cca/9-23-92/8809a/JAWP 12 7 <br />