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. ) Mr. Marty Hanug Project 803026 December 135 20M Page 2 Groundwater rring wells currently monitor water quality toear depth of 75 fool below the ground surface (BGS). Based on thus data, IT proposes to push the CPTs In a depth of approximately 100 >m BGS or to the base of a permeable unit (dwasountered at the base of the CPT). Dismcte groundwater samples will then be collected from permeable were within the interval externing from (be Water table (approximately 26 feet BGS) to a depth of IN foot BGS. IT proposes to collect a mosimago of few groundwater samples per CPT. One CPT will be pushed adjacent to downgradima groundwater monitoring weg MW-5. IT proposes to begin groundwater sampling below the base of the screened interval in this well (26 to 64 feet BGS). The Proposed scope of work is described in the following sections. Perform CPT Soundings IT proposed to push fow Ms (CPT-1 through CPTJ) at (be approximate locations shown on Fig= 1 . CPT measurements of cone bearing, sleeve friction and dynamic Pore water pressure will he recorded at 5-cm intervals during permission to provide a nearly continuous hydrogeologic tog, Pore water pmsurc versus time measurements will be monitored to determine relative hydraulic conductivity a selected depths (pore dissipation tend. It is estimated that three to four pore dissipation tests will be performed M each CPT location to define the mere permeable zones. Path of the proposed location Will be cleared of underground obstruction by a utility clearance ammeanactor and by calling Underground Services Alm. Prior to positioning the direct push equipment for CPT activities, each CPT location will he bared-cleared In a depth of 5 feet as an additional precaution against hitting subsurf". obstructions. Bach CPT hole will be granted with a hematite slung while palling the probe out of the hale. Collect Groundwater Samples Fallowing the CPT push, a Ilydropurehto or equivalent system will be used to collect discrete grourdw rrer sampls from holes adjacent to the CPT pounds (2 to 3 feet from the CPT hole). Groundwater samples will he collated by pushing the groundwater sampling device to the dsired depth. The sampler will be pulled back approximately two loser, exposing the temporary well to the waun-bearing zone. A groundwater sample Will then be collected using a 0.5-inch diameter bailer. Groundwater samples will be anf ed from the bailer into the appropriate laboratory-supplied containers, labeled, and thrum rred directly to a Stmemoortified laboratory for analysis.