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Following completion of the drilling operation, a 2-inch diameter PVC well will be installed in the borings. The soil borings will be advanced approximately 10 feet into groundwater. The wells will be constructed with schedule 40 PVC, a 15-foot long, .010-inch screened section surrounded by and covered by clean sand filter pack (#2/3), 3-foot thick bentonite transition seal above the filter pack, and grouted to the surface. The wells will be finished with a locking pressure cap situated within a monument style well vault. See the Proposed Diagram of Well Construction (Plate 4). 4.3 MONITORING WELL LOCATION SURVEY Once the monitoring wells have been installed, the top of each well will be surveyed by a professional surveyor so that depth to groundwater measurements in the wells can be converted to groundwater elevations used to assess the groundwater gradient. The wells will be surveyed relative to a local benchmark. If a local benchmark is not available near the site, the wells will be surveyed relative to an onsite, assumed benchmark with an assigned elevation. The wells will be surveyed as described in Appendix A-3.4. 4.4 MONITORING WELL DEVELOPMENT A minimum of 48 hours after installation, the monitoring wells will be developed to remove fine silt from the well bore and to effectively increase the hydraulic radius of each monitoring well. Surging along the screened interval of the well will be performed to draw the sediment from the formation into the filter pack and the well and to set the sand pack. The monitoring wells will be developed as described in Appendix A.3.2. In addition to developing the monitoring wells until the discharge runs relatively clear of fines, the discharge will be periodically monitored for pH, temperature, and specific conductance to record stable groundwater parameters during the development task. The well development purge water will discharged to the ground surface. 4.5 MONITORING WELL INSTALLATION REPORT Upon completion of the field activities and receipt of the monitoring well location survey, a report of findings will be prepared for client and agency review. The report will include: • Copies of EHD permits obtained for the well installation; • A description of the field activities, observations, and protocols; • Well location survey data and a graphical representation of well locations; • Lithologic logs and well construction diagrams; 67451.WP1/ST06R295/FB:ly Page 6 of 14 ©2006 Kleinfelder, Inc. March 31,2006