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II. Monitoring Well Initial Inspection, Locations and Conditions <br />Four monitoring wells are located on Parcels I, ll and III at the Delta Bulk <br />Terminals Facility. A site reconnaissance and a magnetometer survey were <br />performed on April 9, 2003 to locate the four monitoring wells and access the <br />current condition of each well. As indicated in the background section, Dames <br />and Moore installed the wells in 1991 under well installation permits issued by <br />the San Joaquin County Environmental Health Department (EHD) (see <br />Reference). Well logs and details were not available but all appeared to be <br />either Sch. 40 PVC cased 2-inch diameter, or Sch 80 PVC cased 4-inch diameter <br />25-foot deep wells. When the monitoring wells were uncovered and repaired on <br />April 25, 2003, all the casings were found to be 4-inch diameter well casings. <br />The April 9, 2003 site reconnaissance with Global Positioning System (GPS) <br />monitoring well location coordinates is summarized below. <br />11.1. Monitoring Well MW-1 (GPS N 37 56.879; W 121 19.968) <br />This monitoring well is located on Parcel III just north of the railroad tracks <br />about 16 feet north of a telephone pole. The well was buried and digging away <br />the surface fill exposed the concrete collar. The cap appeared to be missing and <br />the monitoring well casing may be filled with the fill (assumed to be coke residual <br />mixed with soil). This well was originally installed as the "upgradient" well for <br />background sampling. <br />11.2. Monitoring Well MW-2 (GPS N 37 56.719; W 121 19.997) <br />This monitoring well is located on Parcel I in an area behind the sulfur <br />storage area and building. The monitoring well concrete collar and lid were in <br />place and rusted shut and could not be opened. The casing is assumed to be <br />intact. <br />11.3. Monitoring Well MW-3 (GPS N 37 56.740; W 121 19.949) <br />This monitoring well is located in Parcel II adjacent to the storm water <br />runoff area. The casing is an exposed location with a broken top, and was not <br />capped at the time of the visit. The casing appears to be Sch 80 PVC and water <br />was observed in the casing, estimated to be about 4.0 feet below existing grade. <br />3