Laserfiche WebLink
9 <br /> • 07 October 2002 <br /> AGE-NC Pi oject No 01-0827 <br /> Page 6 of 7 <br /> Following completion of the monitoring wells, well elevations and locations will be surveyed by a <br /> California-licensed surveyor <br /> 43 WELL DEVELOPMENT AND SURVEY <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 parametei s (pH, electrical conductivity, and temper ature) have stabilized <br /> 44 GROUNDWATER SAMPLING PROCEDURES <br /> Ground watei sample collection will be performed in accordance with the EHD's Recommended <br /> Groundivatet Sampling Guidelines, dated 15 February 1995 <br /> • 4 4 1 Static Water Level Measurements <br /> Befoie purging and sampling during giound watei monitoring events, static water level will be <br /> measured using an electric watei level indicator Water level data will be recoi ded to the nearest 0 01- <br /> foot from a refer ence point marked of the top of the PVC well casing Befoi e and after each use, the <br /> measurement device will be rinsed with water <br /> 4 4 2 Well Evacuation <br /> Subsequent to measurement of depth to water and prior to sampling, the well will be put ged using <br /> a submet sible pump or a disposable bailer to ensure that the sample is representative of the formation, <br /> i athet than water standing in the well casing The well will be pui ged until 1) a minimum of three <br /> casing-water volumes is removed fiom the well and/or 2) the field-measured ground water <br /> parameters have stabilized However, if a well is purged dry prioi to evacuating thi ee casing-water <br /> volumes, a ground water sample will be collected following 80 percent t ecovery of gi ound water <br /> within the well or within 2 hours of well evacuation <br /> 4 4 3 Sample Withdi awal <br /> Water samples will be collected from the monitoi ing well using a disposable polyethylene bailei <br /> These bailers ai e disposed of after one use and requii e no decontaminating,thereby minimizing cross <br /> Advanced CeoEnvirenmental Inc <br />