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3.0 PROPOSED SCOPE OF WORK 3.1 APPROACH 1. To monitor the quality of the ground water at the site,one upgradient ground water monitoring well (MW-1) and three downgradient monitoring wells (MW-2, MW-3 and MW-4) will be installed and monitored. MW-I will be located near the southwest property boundary (see Figure 2 for approximate Iocation of the well). It is anticipated that MW-1 will provide data to evaluate the ground water quality on the upgradient side of the OWS and evaporation pond. MW-2 will be located downgradient from the OWS_ MW-3 and MW-4 will be located downgradient from the evaporation pond- 2. MW-1 is proposed at a location that is: Upgradient from the site and is located on BNSF property. • Located far enough upgradient so that it is expected to be outside of the zone of influence of any leak from the evaporation pond_ 3. MW-2 is proposed at a location that is- • Downgradient of the OWS. • Placed approximately 100 feet from the center of the OWS to represent the full zone of potential influence- Located in an area that will be relatively accessible and not impact the operations of the facility. 4. MW-3 is proposed at a location that is: ! Downgradient of the evaporation pond. ! Placed approximately 100 feet from the center of the evaporation pond to represent the full zone.of potential influence. • Located in an area that will be relatively accessible and not impact the operations of the facility. 5. MW-4 is proposed at a location that is: • Downgradient of the evaporation pond. • Located further downgradient than MW-3,to serve as an evaluation point should a release be detected at MW-3. Located in an area that will be relatively accessible and not impact the operation of the facility. TRC lut ons 90'd S0:8 10, q upr