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PES Environmental,Inc. <br /> Ms. Margaret Lagorio <br /> November 15, 2000 <br /> Page 3 of 3 <br /> Soil samples will be retained for lithologic description and will be recorded by a PES engineer <br /> or geologist in accordance with the Unified Soil Classification System (USCS). <br /> After advancing the borings to approximately 3 to 5 feet below the water table, a temporary <br /> groundwater well point will be inserted using 5 feet of screened polyvinyl chloride (PVC) <br /> casing and blank PVC in the remainder of the borehole. Grab groundwater samples will be <br /> collected through the PVC casing with a 1/2-inch diameter stainless steel bailer and decanted <br /> into appropriate pre-cleaned glass sample bottles provided by the project laboratory. Each <br /> sample will be labeled with the project name and number, date, time of collection, and sample <br /> identification number prior to being stored in a chilled, thermally insulated cooler. <br /> Groundwater samples will be analyzed for: (1) aromatic and halogenated volatile organic <br /> compounds (VOCs) using U.S. EPA Test Method 8260B; (2) total petroleum hydrocarbons <br /> quantified as gasoline, diesel, and motor oil by U.S. EPA Test Method 8015 modified. In <br /> addition, groundwater samples from the two locations closest to the Applied Aerospace <br /> Structures facility will be analyzed for hexavalent Chromium by U.S. EPA Test Method <br /> 218.4. To avoid cross-contamination, all sampling equipment will be decontaminated prior to <br /> and between sampling events. Following completion of the groundwater sampling, the <br /> boreholes will be backfilled with a cement-bentonite grout emplaced by tremie pipe and the <br /> surface will be patched to match the existing surface. <br /> We trust this workplan provides you with the information required at this time and meets with <br /> your approval. If you have any questions or require additional information, please call me at <br /> (415) 899-1600. <br /> Very truly yours, <br /> PFS ENVIRONMENTAL, INC. <br /> Marcus A. Trotta <br /> Senior Geologist <br /> Attachments: <br /> Plate 1 - Site Location Map <br /> Plate 2 - Site Plan <br /> Application for Permit <br /> Check for $439.00 <br /> cc: Ms. Jeanie Poling - Catellus Development Corporation <br /> 58901201WOOl.aoc <br />