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IwoI- IwiURHNUUM I L S T-KGp„ w CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD • CENTRAL VALLEY REGION 3443 Routier Road, Suite A Sacramento CA 95827-3098 Phone: (916)255-3000 CALNET: 8-494-3000 To: Christine Holm From: Rudy Schnagl Chief, Agricultural Regulatory Unit , _ DATE: 12 September 1995 SIGNATURE: Pc.nn Subject; LVSPEC TIONS OF'AERL4L APPLICATORS _ On 12 September 1995, I inspected five aerial applicators in San Joaquin, Stanislaus and Merced counties. A summary of the inspections is provided below. Please complete the WDS forms needed to fortnalty record the inspections and send copies of the forms to the applicators. `— For the most part,the sites looked good. Trinkle and Boys deserves additional attention and we should n)ake a follow through call in four to six. weeks to see how they are progressing on their new system. Also, John Brigham asked if we knew what phI was best for breaking down oil. He continues to have problems with engine oil from the planes getting into his treatment system. He was wondering whether San Joaquin Helicopters has a flocculation system that might work. If you have any information on how to deal with oil, please contact John. r. 1'RiNKI,E AND BOYS Contact: Duane Boys The concrete pad under the mihing and loading area still has major cracks and staining. The sump appears to be clogged and the sump pump is reportedly not operating. Stains that appear to be pesticide spills were noted on the asphalt between the shop/office building and the gas pumps to the cast ofthe building. 'T'here were also heavy oil and grease deposits on the asphalt in this area. Ilic aircraft are currently being washed at Patterson Flying Service, but arrangements are being made to replace the concrete and.install a new wastewater system within a.month or two. It will have a double lined sump and two above grotxtd tanks. I indicated that they would not have to get preconstruction approval of the design if it was patterned after a system that had already received Regional Board review. I suggested. however, that it was advisable to contact us with his plans. 111cy have two large dumpstcrs. One is for empty cardboard boxes which are recycled by Delta Paper. The other is for paper bags and seals from the pesticide bottles. The bags are reportedly triple rinsed, inspected by the Agricultural Commissioner and taken to the transfer station in Tracy. The dumpster for the paper hags is emptied every four to five months.