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N%Wl Ifto Kennedy/Jenks Consultants 3.4.2 Development After waiting a minimum of 48 hours to allow curing of the grout and concrete, the monitoring wells will be developed by surging and pumping until the water removed from the wells is sediment-free, no further improvement in water quality is observed, or 10 casing volumes have been purged. Field parameters of pH, temperature, and conductivity will be recorded. Development equipment will be decontaminated between wells using non-phosphate soap and potable water with a final rinse with distilled water. The monitoring wells will be allowed to recover for a minimum of 72 hours following well development, prior to monitoring and sampling. Development water will be contained at the well site and then discharged on the ground at the well site in a manner that does not interfere with site safety. 3.5 Groundwater Sampling and Analysis Initial samples will be collected from the monitoring wells no sooner than 72 hours after the newly installed monitoring wells have been developed. Groundwater sampling will be performed in accordance with the Kennedy/Jenks' SOG for Groundwater Sampling (Appendix B). The water level at each new well will be measured relative to the top of well casing to +/- 0.01 feet accuracy before purging, and the date and time will be recorded. At least three casing volumes of water will be purged from each monitoring well prior to sampling in order to acquire samples representative of aquifer conditions. The field parameters pH, temperature, and specific conductance will be monitored during purging to document stabilization. The parameters will be measured in accordance with Kennedy/Jenks' SOG for Field Measurement of pH, Temperature, and Specific Conductance (Appendix B). Purge water will be distributed on the ground at the well site. Following collection, groundwater samples will be submitted to a state-certified laboratory for analysis. The laboratory will follow its normal turn-around-time and internal quality assurance/quality control (QA/QC) procedures during the analysis. The constituents for analysis, as well as preferred methods for the analyses, are presented in Table 2. Monitoring of the newly-installed monitoring wells will then be incorporated into the MRP activities. 3.6 Surveying The locations and well casing elevations of the new monitoring wells will be horizontally and vertically surveyed by a licensed land surveyor. The ground surface and top of well casing elevation will be surveyed to the nearest 0.01 foot relative to mean sea level. The ground surface and top of casing will be surveyed to the North American Vertical Datum (NAVD) 1988, relative to the nearest benchmark for the Site. Horizontal locations of the new wells will also be surveyed relative to the California Coordinate system to 0.1 foot precision. 3.7 Residuals Management Residuals generated as a result of these activities are anticipated to include soil cuttings from the drilling activities, decontamination water from the drilling activities, water from development of the monitoring wells, and purge water from sampling of the monitoring wells. The soil cuttings Monitoring Well Replacement Work Plan Page 6 Sutter Home Winery, Lodi, California gA% PWmIJ4 108'08850 A sutlxlwmaa4rei M.I ed 11W d.