Laserfiche WebLink
t <br /> O C ll <br /> Yr.,:s:{,I• r:;l:.r�i r:,;. r�; <br /> Equipment Cleaning and Decj)ntaniination <br /> All water samples are placed in precleaned laboratory-supplied bottles. Sample bottles <br /> comes in <br /> and caps remain sealed until actual!er s thoroughly tte. All equipment cleaned with a trisodiumlph phosphate <br /> contact with the well or ground <br /> (TSP) .olution and rinsed with dei7oe`chtwei� �nepledf ore use Wellsaa e sampledin This cleaning pi )cedure is followed between <br /> approximate order of increasing contamination.useda newacnrdon card s usediin each the <br /> wellQr All <br /> cleaned. If a nylon or cotton cord <br /> equipment blanks are collected prior , <br /> to sampling. The blanks are analyzed periodically <br /> to ensure proper cleaning procedures <br /> Nater Level Measurements <br /> or <br /> Depth to groundwater is measured in each well using <br /> es sampling ussealed <br /> electric sounder prior to purgirig or sampling. Wellknown or suspected of <br /> interface <br /> is used to <br /> containing tree-phase petroleum hydrocarbons, <br /> groundwater level. Measurementsabare collected <br /> measure the hydrocarbon thickness <br /> and recorded to the nearest 0.01 foot. Each monitoring well's total depth will be <br /> measured; this will allow a judgement cf well siltation to be made. <br /> Bailer Sheen Check <br /> If no measurable free-phase petroleum hydrocarbons are detected, a clear acrylic bailer <br /> is used to determine the presence of a sheen. Any observed film as well as odor and <br /> color of the water is recorded. <br /> Groundwater Sampling <br /> Prior to groundwater sampling, each well is purged of"standing" groundwater. Either <br /> a bailer, hand pump, or submersible pump is used�Y yield farrnatron, samples will be <br /> . The amount of <br /> purging is dependent on the well yield g H, and specific <br /> be <br /> collected when normal field measurement, including temperature,olumes of water have <br /> conductance stabilize, provided a minimum of three well-casing <br /> been removed. Field measurements will be talcenHftanpurging ciic conductance) a e <br /> Physical parameter measurements (temperature, p <br /> closely monitored throughout the well purging ued until d re used <br /> as dpar met ors <br /> assessing sufficient purging. Pursing contin <br /> have stabilized. Specific conductance (conductivity) meters are road to the nearest±10 <br /> EXCF,LTECH, INC. <br /> Groundwater Sampling Protocol <br /> Latest Revision: May 3, 1991 <br />