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^ rt 11 <br /> Product thickness is calculated by subtracting the depth to ' <br /> product fromi' the depth to water. In addition, water <br /> elevations are adjusted - for the presence of fuel with the <br /> following calculation: , <br /> (Product, Thickness) ( .8)+(Water Elevation) <br /> : = Corrected Water Elevation <br /> Note: The ' factor of 0.8 accounts for the density difference <br /> between water and petroleum hydrocarbons. <br /> Newly installed wells will be allowed to stabilize for 24 <br /> hours after development prior to free product inspection. " <br /> An acrylic Surface Sampler will be used!: for visual <br /> inspection of the groundwater in order to ::note sheens <br /> (difficult to' detect with the ' Interface Probe) , odors, <br /> microbial action. and sediments. The sampler is calibrated <br /> in' inches and �ce_ntimeters for visual inspection of product <br /> thickness. <br /> To reduce the potential for cross contamination between <br /> wells, the monitorings will take place in order from the <br /> least to most contaminated, if known. Wells containing free <br /> product will !' be monitored last. %Between each well <br /> monitoring theJequipment will be decontaminated: <br /> Water level data collected from the wells will be used to <br /> develop a groundwater contour map for the project site. ;I <br /> Groundwater flow will be estimated to be perpendicular to <br /> equipotential lines drawn on the map. <br /> 10.0 Well Development Protocol <br /> Groundwater monitoring wells will be surged and developed { <br /> prior to setting' the surface seal. Approximately 10 times <br /> the volume of water in the casing will- be withdrawn if <br /> possible. Casing volumes will be "calculated in the <br /> following manner:' <br /> Volume of Schedule 40. PVC Pipe <br /> i <br /> I <br /> Diameter I.D. Volume <br /> (inches) (inches) Gal/linear ft.' <br /> ------------------------------ <br /> 2 2.067 0.17 <br /> 4 4.026 _ 0. 66 <br /> I <br />