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L s d� J.R SIMPLOT COMPANY/1677 HOWLAND ROAD/ P.O.SOX 198 Sumn�@)R AgnBusiness LATHROP, CALIFORNIA 953301(209)858-2571 �r apyr. `��+ �'"•'�i, rte,._ 07 kj May 9,2007 ij San Joaquin County Environmental Health Department 304 Weber Avenue,Third Floor Stockton,California 95202-2708 Attention:Mr.Muniappa Naidu Dear Mr.Naidu, I spoke to you this morning regarding a small sulfuric acid spill at I.R. Simplot's,Lathrop,California Plant. The spill was estimated at 4 ounces of 98%sulfuric acid spilled onto the soil at the edge of the tank.I told you that we would use"the sulfuric contaminated soil in our process to produce fertilizer pellets and that we would not create any hazardous material that we either needed to treat or dispose of. You requested a fax explaining how we would do this. I called and left you a message at 12:45 PM today stating that I had an update on the spill. At the time I talked to you I had not been given complete information. After cleaning up the contaminated soil, operations personnel placed an absorbent pad below the wet spot on the tank. At the time the pad was placed the slow drip had been stopped with a repair.They did this as an additional precaution.The pad will have a small amount of residual acid on it from contact with the concrete and tank. This will need to be properly disposed of. Now to the explanation of our use of the contaminated soil in the fertilizer process: We make NPK Fertilizer pellets at the plant. The raw feeds to the process are ammonia, acid,sand(as a filter)and various other raw materials depending on the nutrient requirements of the specific product being manufactured.The filler can be sand,dirt,etc.We use hundreds of tons of this type of material annually. We typically use sand due to the uniformity it helps provide as a granulation material. If we have contaminated soil that has recoverable nutrient value we use it in place of the sand. We have used this method of recovery for many years and have reported it on the follow up reports to your office from previous incidents. Today we cleaned up the small amount of acid and soil. We dug well below the small amount of acid contaminated soil to ensure we recovered all of it. We then added the resulting approximately 2 gallons of soil to the sand feed into the process. Ward Wolleson, our Environmental Manager, will follow up with you by phone tomorrow. Ward wilt also send you the official written follow up report.His phone numbers are: office 209-858-6429 and cell#209- 649-9344. If you should have additional questions please do not hesitate to contact me, My office phone is 209-858- 6424 and my cell#is 209495-2655. Sincerel , Jo n L Yanak California Manager of Manufacturing,J.R.Simplot Company