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RESNA Industries Inc 1ACAMA <br /> Quality Assurance/Qualay Control Pian <br /> Revised November I992 <br /> Provided the database is of sufficient size, statistical techniques may be employed for data <br /> validation. <br /> 9.0 GROUNDWATER MONITORING PROTOCOL <br /> ' Monitoring of depth to water and free product thickness within wells at the site: will be <br /> conducted using an interface Probe or Conductivity Meter For consistency,-all measurements <br /> ' will be taken from the north side of the wellhead at the survey mark. To assess potential <br /> Infiltration of fine-grained sediments, total well depth will also be sounded <br /> 1 � <br /> Product thickness is calculated by subtracting the depth to product from the depth to water. In <br /> ' addition, water elevations are adjusted for the presence of fuel with the following calculation: <br /> (Product Thickness) (.8) + (Water Elevation) = Corrected Water Elevation <br /> ' NOTE. The factor of 0 8 accounts for the density difference between water and petroleum <br /> hydrocarbons <br /> ' NewIy installed wells will be allowed to stabilize for 24 hours after development prior to free <br /> product inspection. <br /> ' An acrylic Surface Sampler will be used for visual aI 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 inspection of product thickness. <br /> 1 <br />