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CALIFORNIA s GEORGE DEUKMEAAN,GOvw wr <br /> CAIJFORNIA REGIONAL WATA QUALITY CONTROL BOARDEM <br /> — <br /> CENTRAL VALLEY REGION ' <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> 21 November 1988 <br /> _ <br /> Mr. Charles Nichols Nov 2 3 1988 <br /> USA Petroleum Corporation ENVIRONMENTAL HC, Up <br /> P.O. Box 1839 PERMIT/SERVICES <br /> Santa Monica, CA 90406 <br /> WORK PLAN FOR USA STATION #65 AT 2500 WEST LODI AVE. , LODI <br /> We have reviewed the Work Plan dated 4 November 1988 from your <br /> consultant, Applied GeoSystems, regarding the additional work <br /> needed at the site. Following are our comments: <br /> 1. Plate P-3 shows that the proposed well locations are east of <br /> the site across a Woodridge Irrigation District Canal. It <br /> is likely the irrigation canal leaks and may create a <br /> hydraulic ridge which would affect the contamination plume. <br /> If after taking water levels it is determined that this is <br /> the case, additional wells west of the canal will be <br /> necessary. The other alternative is to relocate at least <br /> one of the proposed wells west of the canal. <br /> 2. The text is confusing on whether a Teflon bailer or a <br /> submersible pump will be used -to collect water samples after <br /> purging. It is also not indicated what type of submersible <br /> pump would be used. Provided that an acceptable pump is <br /> proposed, either method is acceptable if the sample is <br /> obtained from the top four feet of the water column in the <br /> well. <br /> 3. In addition to obtaining soil samples every 5 feet, one <br /> sample is to be taken immediately above the saturated zone. <br /> Resolving the above concerns should not unduly delay the proposed <br /> investigative work. USA Petroleum should continue obtaining any <br /> necessary local permits and begin work as soon as possible. As <br /> requested in previous correspondence, a Problem Assessment Report <br /> is to be submitted by 30 December 1988 to this office and Ms. <br /> Laurie Cotulla of the San Joaquin Local Health District. <br /> If you have any questions, please call me at (916) 361--5721. <br /> BRIAN NEWMAN <br /> WRC Engineer <br /> BCN:bcn <br /> cc: 40s.' Laurie Cotulla, San Joaquin Local Health District, <br /> Stockton <br /> Mr. Barry Marcus, Applied Geosystems, Sacramento <br />