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or stainless steel sleeves will be washed and rinsed prior to each sampling interval. Washing of the sampling tools and sample liners will include: Non-phosphate detergent and tap water rinse, using a bristle brush; Tap water rinse; and De-ionized / distilled water rinse. Decontamination procedures for soil borings installed in areas where PCBs are suspected will include pressure washing of the sampling equipment followed by a de-ionized water rinse to further reduce the potential for cross-contamination. The sampling tools will be decontaminated before each sample, and the other sampling equipment (direct push rods and augers) between sample locations. Decontamination water will be drummed on site pending disposal at a licensed facility. Decontamination of groundwater sampling equipment will not be necessary; groundwater samples will be collected from the monitoring wells using dedicated disposable bailers. However, groundwater-monitoring equipment such as the water level meter (or interface probe) will be decontaminated before and after use at a well location. 2.4.7 WASTE HANDLING AND DISPOSAL Waste soil, decontamination water and purge water from the monitoring wells will be temporarily stored on site in Department of Transportation (DOT) approved, 55-gallon steel drums. The drums will be labeled to identify the date of accumulation/generation, generator name, type of media (soil, water), and telephone number of contact person. Following waste characterization, the waste materials will be transported to a waste treatment or disposal facility. 2.5 FRENCH DRAIN ALIGNMENT SURVEY The French drain previously located on Parcel 3 probably extends to the north and south beneath the eastern track of the former rail line, or may extend in other directions independent of the former rail. This task will include a field survey to evaluate if the drain is present, and if present, the length and direction of the drain. The survey will include two (2) initial spot excavations; one (1) on Parcel 24 located to the immediate southeast of the intersection of the former rail line and Weber Avenue and one (1) on Parcel 4 located to the immediate north of the intersection of the former rail line and Washington Street. If the drain is present at each location, the alignment of the drain will be presumed to be located along the entire length, beneath the eastern of the two (2) rail tracks. If the drain is not present at each of these first two (2) locations, additional spot excavations will be performed along the rail line at a distance of 50 feet from the last known location of the drain until the alignment of the drain across the Stockton UPRR Project area is defined. The spot excavations will be located between the rail road tracks, approximately three (3) feet wide in a direction perpendicular to the tracks, having a depth to the top of the drain (estimated to be four (4) feet bgs. The spot excavations will not penetrate the drain. It is anticipated that only Golden State Environmental, Inc. - 15 - Los Angeles, San Diego and Houston Revised Work Plan — Soil and GW Characterization July 2006