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ATE C„ CALIFORNIA- Environmental Protection Agency PETE WILSON, Governor CALIFORNIA'REGIONAL WATER QUALITY CONTROL BOARD CENTiAL VALLEY REGION 3443 Routier Road, Suite A Sacramento, CA 95827-3098 PHONE: (916) 255-3000 FAX (916)255-3015 14 January 1993 Mr. Rex Hopkins Mr. Dave McRoy Pacifex French Camp Warehouse P.O. Box 1197 French Camp, CA 95231 SUMMARY OF MEETING Thank you for meeting with me yesterday to discuss the issues surrounding the stormwater pond. As I stated, the Board does not believe that the stormwater is currently causing a threat to area drinking water because surrounding drinking water wells, which were tested last spring, showed low nitrate levels. However, staff feels that the total nitrogen content of the stormwater in the pond is too high to ignore, and a series of steps must be carried out to determine if there is any potential future threat to groundwater. As you recall , we mutually agreed on a course of action. First, Pacifex will pump the stormwater out of the pond within the next two weeks. The stormwater will be placed onto nearby agricultural land, at an agronomic rate for the existing crop. Tailwater containing the stormwater must not leave the cropland. This step will remove the high nitrogen stormwater from the pond. Next, Pacifex will notify me after the next storm which causes the pond to contain stormwater. I will resample the pond, allowing us to determine nitrogen values for the "first flush" stormwater, and for stormwater generated by subsequent storm events. if this second set of stormwater also contains high nitrogen values (above 100 mg/l total nitrogen) , then Pacifex will again pump it onto agricultural land. After the pond dries out in the spring or early summer, Pacifex will be required to collected soil samples from a minimum of two locations beneath the pond. Samples should be collected with an auger, and be taken from 0-6", 24- 30", and 54-60" beneath the pond lining. The soils samples must analyzed for NO3 + NO2 and total Kjeldahl nitrogen (TKN) . EPA standard procedures must be followed during sampling and analysis. After the analytical results have been received, staff will meet again with Pacifex to discuss two items: whether the soil samples indicate a potential threat to water quality, and approaches to minimize any future threat to water quality from the stormwater pond. Future approaches may include some or all of the following: better housekeeping, periodic sampling of the stormwater,