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GROUNDWATER TECHNo,,GX <br /> STANDARD OPERATING PnO EDS <br /> CONCERNING WATER SAMPLING METHDAOLOGX <br /> SOP g <br /> Prior to water sampling. each well shall be <br /> Pumping a minimum of�n <br /> dischar a lour well volumes or untiltheg water indicates stabilization of temperature, <br /> canduct?vitY,and pH. If <br /> your well volumes are removedthe worlstabilizatian before <br /> achieved, is <br /> the ssmple should be taken when the water <br /> level in the well recovers to Sot of its initial level. <br /> Retrieval of the water sample, sample handling <br /> preservation shall. he conducted in accordance ith sample <br /> Groundwater Technology <br /> Procedure (GTL Sop 1Laboratory Standard Operating <br /> In Water". The samPlIncancip,,,erning Sampling For Volatiles <br /> a teflon and/or stainlesse teeietamused <br /> shallcconsist h meets of <br /> EPA regulations. Glass vials with teflon lids should be <br /> used to store the collected samples. <br /> To <br /> le <br /> theisamprledawaterisuchrthat thehwater 6thall be filled with <br /> of the vial• The cap should then be ands above the lip <br /> cXIY <br /> checked <br /> Vial dttiehtenedthat urelybubThe <br /> es via, <br /> should thendbej the <br /> to labeling of the sample arenot present <br /> include a sample identiificat onenumber information should <br /> date, time, type of analysis re r job identification, <br /> name. Chain-of-Custody forms shalltbe completeded and the as per <br /> Groundwater Technology Laboratory Standard Operating <br /> Procedure (Sop 11) concerning Chain of Custody. <br /> The vials should be immediately placed in hi h <br /> coolers for shipment to the laborato g duality <br /> Coolers <br /> Should be packed with sufficient ice a freezer Pack <br /> ensure that the samples are kept below 4C. Packs s <br /> are received at the Groundwater TechnologySamples which <br /> boratory <br /> above 10 C. will be considered substandard.�To minimize <br /> sample degradation the prescribed analysis shall take <br /> Place within seven days Of sample collection unless <br /> specially prepared acidified vials are used. <br /> To minimize the potential for cross contamination between <br /> wells, all the well development and water sampling ,equi <br /> Iment which contacts the groundwater shall p- <br /> Measure, <br /> each well sampling. be cleaned <br /> Measure, A,s a second precautionary <br /> easureure, the wells shall be sampled in order of increasing <br /> contaminant concentrations as established by previous <br /> analysis. <br /> - GR411%fntArkH <br /> L---= TECHN(Pu)G% 1%L <br /> J' <br />