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_ <br /> 00 <br /> 'r <br /> y <br /> Wat'rWork <br /> Grr oundrrater :ionitor�ing Pro, t�cQ3 <br /> Monitoring depth to water and free product thickness within wells <br /> at the site will be conducted using an Interface Probe and <br /> Surface Sampler. The Interface Probe is a hand held, battery <br /> operated device for measuring depth to petrole= <br /> p <br /> depth to water as measured from an established datum (i.e. , and <br /> - of the well casing which has been surveyed) . For consistency, <br /> north <br /> all measurements will be taken form the side of the <br /> sediments, <br /> wellhead. To assessth potential infiltration of fine grained <br /> well depw�S.11 be sounded using the interface probe. <br /> Product <br /> product from kthesdepth tois ldater. In addition,subtractinwater depth to <br /> are <br /> levatins <br /> calculation:adjusted for the presence of fuel with the efollowing <br /> (Product Thickness) (.8)+(*Nater elevation) <br /> Corrected Water Elevation <br /> Note: The factor of 0.8 accounts for the densit <br /> between water and petroleum hydrocarbons. Y difference <br /> An acryl�.c Surface Sampler shall be used for visual inspection of ` <br /> the groundwater to note sheens (difficult to detect with the <br /> IIlterface Probe <br /> and sediments. <br /> sampler is cali,bratedrsinmin hesalandt�centimeters for on The <br /> inspection of product thickness, far visual <br /> w To reduce the potential for cross contain*nation between wells, <br /> the monitorings will take place in order from the least to <br /> most <br /> contaminated. Wells containing free product will be monitored <br /> last- Between each monitoring the e <br /> uiment will be <br /> laboratory grade detergent and double rinsed with tapwashed water, wand j <br /> final rinsed with deionized water. <br />