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i <br /> �Mr. David Noe -2- May 5, 1989 <br /> Mobil Oil Corporation <br /> w <br /> Comment No. 2 • <br /> KEI proposes to install five (4" diameter) monitoring wells <br /> in order to verify the ground water impact. The proposed <br /> work plan is attached. _ <br /> Comment No. 3: <br /> well development information has been documented in the <br /> Field Activity notes. However, as recommended, well <br /> development information will be recorded on a form which <br /> will include the well number, the method of development, <br /> depth to water, flow rates, total flow, field water quality <br /> measurements (Ec, pH, temp. ) and other observations. A <br /> copy of the well development is attached. <br /> The new proposed monitoring wells will be developed by <br /> pumping, surging and/or bailing to remove finer particles <br /> near the well screen and improve hydraulic communication <br /> with the surrounding formation. Water clarity, pH, " F, �t <br /> temperature, specific conductance and volume extracted will r°�' <br /> be measured during development. Development will terminate -,,-,, ., .N <br /> when the well visually produces little or no sediment and <br /> water-quality indicators measured during development and <br /> sampling stabilize. All water will be stored in temporary <br /> holding tanks pending receipt of the water-quality results. <br /> The new wells will be sampled after at least four well <br /> casing volumes have been withdrawn from each well or, if <br /> the water levels recover slowly after purging, after water- <br /> level recovery. Samples will be collected using a Teflon <br /> bailer. The bailer will be cleaned with laboratory-grade <br /> detergent followed by a deionized water rinse between each <br /> sampling. Samples will be decanted from the bailer into 40 <br /> ml. VOA vials with Teflon-lined screw caps and stored in a <br /> chilled cooler for delivery to the laboratory. <br /> Comment No. 4 <br /> KEI will resample monitoring wells E1 to E3 if they still <br /> exist, per RWQCB's request. , ' ,{ =r- <br /> II. PRELIMINARY REPORT REQUESTED INFORMATION <br /> It is our understanding that Items 1 and 2 described in <br /> Page 2 of the RWQCB letter dated April 17, 1989 will be <br /> provided by the Mobil Oil Corporation. <br />