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• 08 March 2000 <br /> AGE-NC Project No 96-0232 <br /> Page 10 of 11 <br /> pound sack of cement The grout will be placed by pumping through tremmie pipe A grouting <br /> inspection will be scheduled with RWQCB/PHS-EHD personnel <br /> 4 4 WELL DEVELOPMENT <br /> Development of the proposed wells will consist of a combination of bailing with a stainless steel <br /> bailer to remove the mayor portion of fine-grained sediment from inside the well, surging to flush <br /> out or draw in sediment from the filter pack and additional ground water evacuation (purging) with <br /> a submersible pump to finish the removal of fine-grained sediment Developmental purging activities <br /> will be continued until field parameter(pH, electrical conductivity, and temperature) readings have <br /> stabilized and purged water Is visually sediment-free <br /> 4 5 EQUIPMENT DECONTAMINATION <br /> All sampling tools used for sample collection will be thoroughly rinsed with clean water after being <br /> . washed with a solution of Alconox All down-hole drilling and sampling equipment will be pressure <br /> washed pnor to starting each boring <br /> 4 6 GROUND WATER MONITORING PROCEDURES <br /> Groundwater sample collection will be performed in accordance with PHS-EHD guidelines (San <br /> Joaquin County Public Health Services Environmental Health Division Well Standards) and <br /> RWQCB guidelines (Tri-Regional Water Quality Control Board Recommendations for Preliminary <br /> Investigations and Evaluation of Underground Storage Tanks) sampling protocols <br /> 4 6 1 Static Water Level Measurements <br /> Prior to all ground water purging and sampling, static water levels In each well will be measured <br /> using an electric water level indicator Water level data will be recorded to the nearest 0 01 foot from <br /> a reference point marked on the top of each PVC well casing Before and after each use, the <br /> measurement device will be rinsed with clean tap water <br /> 4 6 2 Well Evacuation <br /> Subsequent to measurement of depth to water and prior to sampling, each well will be purged using <br /> Advanced Geo En-,lronmental,Inc <br />