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. Section No. 6 <br /> Revision No 1 <br /> Date- January 13, 1992 <br /> Page 49 of 55 <br /> Slug tests will be performed by the project geologist who will in turn <br /> be supervised by a Certified Engineering Geologist. Prior to field <br /> mobilization, all well data and lithologic data will be removed to determine <br /> ■ method of test to be used (displacement or withdrawal) , <br /> ■ volumes of water to be injected or withdrawn, and <br /> ■ method of data collection <br /> Slug displacement tests will be completed by instantaneously injecting <br /> a known volume of water into the well or by dropping a cylinder (slug) into <br /> the well to displace a known volume of water When using the slug injection <br /> method, formational water will be added to the well using a PVC funnel with <br /> a ball valve For the slug displacement method, the slug will be constructed <br /> of PVC pipe with a diameter at least one inch less than that of the well <br /> casing The cylinder will be partially filled with clean sand, capped, and <br /> tested to ensure that no water will enter the slug once submerged No glues, <br /> solvents, or tape will be used in the construction of the slug Clean cotton <br /> rope will be fastened to the slug to lower and raise the slug from the well. <br /> The slug will be washed with laboratory grade detergent prior to and between <br /> uses <br /> Prior to performing the test, accurate static water level measurements <br /> will be collected from the well using the methods described in Section 6 8 2 <br /> Water level measurements collected during the test will be measured <br /> automatically using a data logger connected to a downhole pressure <br /> compensated transducer, or manually, using an electric well sounding device <br /> The transducer measures the pressure resulti-ng from the water over the <br /> 0 <br /> 6-49 <br />