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►non[Tor,I VL j CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. 90-812 MONITORING AND REPORTING PROGRAM FOR TRINKLE AND BOYS AG FLYING SERVICE, ERIC TRINKLE, DWAYNE BOYS, CARL TRINKLE, AND GEORGE BOYS SAN JOAQUIN COUNTY The California Reginal Water Duality Control Board, Central Valley Region, (hereafter Board) finds that: i . Lric Trinkle and Dwayne Boys, dba Trinkle and Boys Ag Flying Service, — Inc. , own and operate a pesticide application business located at 31244 S. Highway 33, Tracy. in the SE 1/4 of the SE 1/4 of Section 17, T3S, R6E, MDB&M. The land 4s owned by Carl Trinkle and George Boys. All four people, and the firm, will be hereafter referred to as the "Discharger". 2. The Discharger currently collects pesticide rinse water and stores it in an above-ground tank for reuse or off-site disposal . However, for approximately 40 years prior to 1986, the Discharger caused rinse water to be discharged to ground at this facility. The disposal history indicates that pesticide residues in site soil have been, or possibly may be, discharged into waters of the state. 3. Area groundwater is less than 10 feet below the surface. The facility is within the New Jerusalem Drainage District, and tile drained areas exist less than one-quarter mile east and one-half mile west of the facility. The tile drainage is discharged to the San Joaquin River. Area surface drainage also flows to the San Joaquin River. a. Beneficial uses of the San Joaquin River are agricultural and industrial supply, recreation, and fish and wildlife habitat. Beneficial uses of the area ground water are irrigation, stock watering, and industrial and domestic supply.. 5. On 27 October, 1.987, Eric Trinkle and Dwayne Boys were issued Cleanup and Abatement Order (C&A) No. 87-734, and on 8 March 1989, Carl Trinkle and George Boys were issued C&A No. 89-705. The two C&As are nearly identical , and order that the Discharger shall "clean up wastes and abate threatened pollution" at the airstrip. This was to be accomplished by first characterizing the former pesticide rinse water disposal area, and then by implementing a site mitigation plan. '- 6. The Discharger hired a consultant to perform the site characterization, which was completed with the submittal of a letter on 30 May 1990.