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CGeafogica!?ec&dcs Inc. <br /> C&B Equipment Page 4 <br /> Ground water Monitoring Report <br /> Project No.336.2 <br /> January 13, 1997 <br /> r-�E <br /> Conclusions <br /> 1. Relatively moderate concentrations of petroleum hydrocarbons are present in two of the <br /> three monitoring wells. <br /> 2. Ground water gradient flows in a north-northwesterly direction, ranging between 0.00702 <br /> ftlft and 0.00375 Mt. <br /> 3. One domestic water well is located within about 25 feet, and roughly up gradient from, <br /> MW-2. It is non-detect for gasoline compounds at this time. <br /> 4. MTBE was tested for and has been confirmed in MW-1 <br /> Recommendations <br /> The following recommendations are made: <br /> 1. Place the site on a quarterly ground water monitoring schedule. The next monitoring <br /> event is scheduled for the first part of late February 1997. <br /> 2. The domestic water well tested in December of 1996 should also be included in the <br /> quarterly monitoring routine. <br /> `? 3. Continue to test the monitoring well water samples for MTBE and have positive results <br /> confirmed- Also test these wells for dissolved oxygen (DO) and oxidation-reduction- <br /> potential (ORP), in addition to the standard field water quality measurements of <br /> temperature, pH, and conductivity. <br /> E: 4. Further work, by means of soil borings and installation of groundwater monitoring wells, <br /> needs to be conducted in order to further define the lateral and vertical extent of the <br /> plume, particularly in a down gradient direction. <br /> 5. Once the plume has been fully defined a risk assessment performed to evaluate the risk <br /> ,__: these chemicals pose to public health and the environment. <br />