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i, <br /> r <br /> ATC Associates Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised 1998 ` <br /> Id <br /> i <br />° l <br /> An acrylic Surface Sampler will be used for visual inspection of the,groundwater in order to note <br /> sheens (difficult to detect with the Interface Probe), odors, microbial action and sediments. The <br /> sampler is calibrated in inches and centimeters for visual inspecti n of product thickness. <br /> �r <br /> it <br /> To reduce the potential for cross contamination between wells, the monitorings will take place in order <br /> from the least to most contaminated, if known. Wells containing free product will be monitored last. <br /> I <br /> Between each well monitoring the equipment will be decontaminated. <br /> Water level data collected from the wells will be used to develop a groundwater contour map for the r <br /> project site. Groundwater flow will be estimated to be perpendicular to equipotential lines drawn on k <br /> the map. <br /> PROTOCOL <br /> 10.0 WELL DEVELOPMENTi' <br /> Groundwater monitoring wells will be surged and developed prior to setting the surface seal. <br /> Approximately 10 times the volume of water in the casing will be withdrawn if possible. Casing <br /> i <br /> volumes will be calculated in the following manner- <br /> .. <br /> anner <br /> i <br /> ;.. 11'� {lrlche�� �ll�e <br /> ................................................................................................ <br /> liM <br /> 2 2.067 0.1.7 <br /> 4 4.026 0.66 <br /> f <br /> 8 I; <br /> i� <br /> ly <br />