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STATE OF CAL:ORN,A GEORGE DEUKMEJIAN.Governor <br /> CALIFORNIA REGIONAL WA QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> � �. <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> 6 May 1988 <br /> Mr. L. A. Moldenhauer <br /> Moldenhauer Engineering Company <br /> 1107 Kennedy Place, Suite 7 <br /> Davis, CA, 95616 <br /> SOUTHWEST HIDE MONITORING WELL DRILLING, SAN JOAQUIN COUNTY (CASE #2664) <br /> I.-'e have reviewed your latest monitoring well proposal dated 3 May 1988. As we <br /> discussed at our 29 April 1988 meeting, the plotted water level data collected to <br /> date do not indicate any consistent, overall ground water flow direction. Accord- <br /> ingly, I suggested installation of shallow piezometers to obtain adequate water <br /> level data in addition to -limited water quality information. I also stated, <br /> however, that installation of the proposed monitoring wells (two shallow, one <br /> deep) would be acceptable as long as the shallow wells had sufficient lateral <br /> spacing. Based on the existing data, it was decided that the best apparent <br /> locations were near the horse barn and near the hide processing facility. <br /> Your 3 May letter proposes installing a three well cluster at a new location <br /> northeast of the ponds near the property boundary. An additional well (s) will be <br /> installed at another unspecified on-site location. Presumably, selection of this <br /> well cluster location is based on a re-evaluation of the existing water level data <br /> since the enclosed location map shows direction lines. No explanation or map <br /> labels are included, however. <br /> Assuming the above is accurate, we approve your 3 May proposal , although, we <br /> believe it would be prudent to better establish ground water flow directions <br /> before installing deeper monitoring wells. It is important to reiterate that the <br /> primary objectives of the ongoing work with regards to ground water is to define <br /> the extent of ground water contamination and establish an effective monitoring <br /> system for the ponds. Southwest Hide must ultimately install an adequate number <br /> of monitoring wells in appropriate locations to accomplish these objectives. <br /> If you have any questions, please call me at (916) 361-5742. <br /> 14 <br /> GARY A. REENTS., P.E. <br /> Project Engineer <br /> GAR:ej <br /> Enclosure <br /> cc: � Joaquin Local Health District, Stockton <br /> Mr. Jana ~leans, Souti,west Hide Company, Manteca <br />