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_L1;j_j .A.N (,J_f0 ROCK & SAND , INC . P. O. Box 66002 Stockton, CA 95206 June 4 , 1990 RECEIVED Ms. Twila L. Leclerc JUN 61990 Area .Engineer ENVIR NM �j� /�� HEALTH California Regional. Water Quality Contro E t SIALHE Central Valley Region S 3443 Routier Road, Suite A Sacramento , CA 95627-303£3 91!': El Rancho Rock & Sand Inspection, 8000 Waverly Read, Linden, San Joaquin County. Dear Ms. Leclerc: To confirm the actions El Rancho has taken to contain its waste water , we have purchased 2 large sand pumps and 'nave installed one in the area of most concern ( the equipment pit where overflow water from our rotary scrubber was overflowing and traveling into a natural drainage area) . This has already eliminated the run-off and for the past week, we have been pumping the pond area that is in the natural drainage area back to our settling ponds. As soon as the pond dries this summer, we will clean out the fines and only the earth berms will be left as an extra precaution. The second sand pump will be utilized in the area of the wash plant where the sand screws could possibly overflow and enter the southern natural drainage area (this has only happened once in our first eleven months of operation) . We have also erected a small earth berm in this area as an extra precaution. As to the fine sands being accumulated in our settling ponds; we have sloped the area in which we are stocYpiling the fines so all excess waters run back into ,ur settling ponds. This procedure works well but we are most interested in pumping the fine sands to ponding areas by use of a suction pump. If this is cost effective , the procedures will be by far the best as it allows us to keep the closest ponds to the plant as reclaim ponds for water. , I hope the above addresses your concerns in your letter of May 30 , 1990 to Ms. Kerry Sullivan and the Notice of Violation letter of April 27 , 1990.