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Kennedy/Jenks Consultants bottom of the boring to one to two feet above the screened section. The wells will be pre-developed after the filter pack is installed, and prior to the bentonite seal being installed. A two-to three-foot layer of protective bentonite clay pellets will be placed to minimize downward L migration of the grout seal into the filter pack. A neat cement grout will be placed above the bentonite extending continuously from the top of the bentonite pellet layer to less than one foot below grade. Based on the construction of existing wells, it is anticipated that this grout seal will be extended to an approximate depth of three to four feet bgs. A locking expansion cap and well-housing enclosure will be installed to control access to the well opening. Wells located in unpaved areas off of the access roads will be completed above grade and furnished with a protective, locking steel casing. Wells located in access roads will be completed with a traffic-rated surface monument. Each surface monument will be completed one to two inches above grade and furnished with a sloping concrete apron to facilitate surface drainage away from the well. A schematic diagram of well construction details is shown on Figure 6. Sampling equipment will be steam cleaned between boreholes. The augers will not be steam cleaned between boreholes. 4.2.2 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 Lsite safety. 4.3 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 L well site. v 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 L Monitoring Well Installation Work Plan Page 11 Sutter Home Winery, Lodi, California gls-group)ameVoE109`08 517 S"homekOg epoliNrwJr¢WI-w WAC