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19 November 1999 <br /> • AGE-NC Project No 99-0657 <br /> Page 9 of 10 <br /> I pipe The PHS-EHD will be notified for grout inspection at least 48-hours prior to conducting <br /> grouting procedures <br /> Following completion of the monitoring wells, well elevations and locations will be surveyed by a <br /> California-licensed surveyor <br /> 45 WELL DEVELOPMENT <br /> Development will consist of a combination of bailing to remove the major portion of fine-grained <br /> sediment from inside the well, surging to flush out or draw in sediment from the filter pack, and <br /> additional bailing to finish the removal of sediment Development activities will be continued until <br /> field parameter (pH, electrical conductivity, and temperature) readings have stabilized <br /> 4 6 GROUNDWATER SAMPLING PROCEDURES <br /> I Groundwater sample collection will be performed in accordance with pertinent applicable sampling <br /> protocols, details of which are presented below <br /> 4 6 1 Static Water Level Measurements <br /> I Before sampling and during groundwater monitoring, static water level will be measured using an <br /> electric water level indicator Water level data will be recorded to the nearest 0 01 foot from a <br /> reference point marked of the top of the PVC well casing Before and after each use, the <br /> Imeasurement device will be washed and rinsed with water <br /> I4 6 2 Well Evacuation <br /> Following measurement and recording of depth to water and prior to sampling, the well will be <br /> Ipurged using a submersible pump or a disposable bailer to ensure that the sample is representative <br /> of the formation, rather than of water standing in the well casing The well will be purged until 1) <br /> a minimum of three casing volumes is removed from the well, and/or 2) the field-measured ground <br /> water parameters have stabilized However, if a well is purged dry prior to evacuating three casing <br /> volumes, a ground water sample will be collected following 80 percent recovery of ground water <br /> within the well or within 8 hours of the well purging <br /> Advanced GeoEmfronmentai,Inc <br /> I <br />