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+ ' • <br /> GEORGE DE.UKMEJIAN,Governor <br /> STA7�OF CAi_IFORNIA <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION p <br /> 3201 S STREET <br /> SACRAMENTO,CALIFORNIA 95816-7090 - <br /> PHONE: (916)445-0270 FEB 10 <br /> 1986 <br /> ENVIROMENTAL HEALTH <br /> PERMIT/SERVICES <br /> 7 February 1986 <br /> Mr. Doug Dutton <br /> Georgia-Pacific Corporation <br /> 133 Peachtree Street N.E. <br /> Atlanta, Georgia 30303 <br /> GEORGIA-PACIFIC CHEMICAL PACKAGING PLANT, TRACY, SAN JOAQUIN COUNTY <br /> We have received a "preliminary" and a "final" proposal from Georgia-Pacific <br /> (GP) regarding final cleanup plans of the ground water pollution resulting from <br /> the storm water pond at the subject facility. The submittals were received on <br /> 14 January and 21 January 1986, respectively. The concept of the staggered <br /> submittals was that we could comment on the first, due on 6 January, so the <br /> final , due on 18 January, would be more complete and acceptable. GP did not <br /> submit the preliminary plan on time, and thus we were unable to comment before <br /> submittal of the "final plan". <br /> The "final plan" is inadequate in the following areas: <br /> 1. The two wells proposed to better define the lateral definition of the <br /> plume, BC15 and BC16, should be at least as far downgradient as the <br /> proposed BC17. This would provide much more confidence in the orientation <br /> of the existing plume. <br /> 2. There was no specific proposal to define the downgradient extent of the <br /> plume, as agreed upon at our 12 December 1985 meeting. <br /> 3. The capture zone calculations assume a 40-font aquifer thickness. We have <br /> asked GP many times , and we ask again, to back this assumption up with <br /> data. If this cannot be done, then a 2-dimensional model is completely <br /> inappropriate in this case. <br /> Other comments are as follows: <br /> 1. In concept, we are in favor of cleanup alternatives 3 or 4. Thee <br /> alternatives remove the greatest amount of chloroform from the ground <br /> water. <br /> 2. The location of well SC17, intended to better define the vertical extent of <br /> the plume, is acceptable. We strongly suggest that the inside casing <br /> diameter of this well be a minimum of four inches. <br /> 4 <br />