Laserfiche WebLink
03/22/2000 17 36 2094671118 AGE STOCKTON PAGE 15 <br /> 08 March 2000 <br /> AGE-NC Project No 96-0232 <br /> Page 11 of 11 <br /> a bailer or submersible pump to ensure that the sample is representative of the surrounding aquifer <br /> grouted water The well will be purged until 1)a minimum of three casing volumes is removed from <br /> the well, and/or 2)the field-measured ground water parameters have stabilized However,if the well <br /> is purged dry prior to evacuating three casing volumes, a ground water sample -will be collected <br /> follov,ing 80 percent recovery of groundwater within the well or withim 24-hours of well evacuation <br /> 4 6 3 Sample Withdrawal <br /> Water samples will be collected from the monitoring well using a new, pre-cleaned disposable <br /> polyethylene bailer These bailers are disposed of after one use and require no decontaminating, <br /> thereby minimi ing cross contamination due to sampling devices Samples will be drawn and <br /> collected in such a mariner that agitation and exposure of the groundwater to the atmosphere is <br /> minimal Sample containers will be filled using the appropriate disposable sampling attachment <br /> which allows controlled flow out of the bottom of the bailer by lifter$the check valve <br /> 4 6 4 Sample Handling <br /> • Ground water samples will be collected into laboratory-supplied containers Ground water samples <br /> for EPA.8260B analysis will be collected into 40-til VOA rials containing 0 5 till of hydrochloric <br /> acid as preservative Following collection the samples will be appropriately labeled and placed on <br /> ice and kept in a cooler until delivered to the laboratory for analysis Chain-of-custody protocols will <br /> be used to document sample custody transfer from the field to the analytical laboratory A chain-of- <br /> custody <br /> hairs-ofcustody form will accompany the samples <br /> • Aduan cad Cz6TRv1ronM*Ota1,Inc <br />