FIELD DOCUMENTS AND WORK PLANS 1988

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WASTE DISCHARGE REQUIREMENTS -7- MARLEY COOLING TOWER COMPANY STOCKTON, SAN JOAQUIN COUNTY 3. The Discharger shall comply with the attached Monitoring and Reporting Program No. 88-124. Once sufficient data have been collected, the Dis- charger shall submit a Technical Report regarding the monitoring fre- quencies and constituents in the Monitoring and Reporting Program. The Board will review the Report and may revise the Monitoring and Reporting Program as appropriate. 4. This Order rescinds Order No. 87-161 (NPDES NO. CAOU81787) , .adopted by the Board on 25 September 1987. 5. The Discharger shall submit a Technical Report before 1 January 1989, which determines treatment plant influent ground water concentrations and the treatment efficiencies for the constituents of concern. The Report shall also describe any physical or operational changes to the treatment plant necessary to meet effluent limits. 6. The effluent toxicity program which was implemented 1 December 1987, shall continue consisting of the following tasks: a. During the months of December 1987 , March 1988, June 1988, and September 1988, grab samples shall be taken once monthly of the effluent and upstream receiving water for static acute and chronic toxicity tests. These tests shall be conducted using three test species , in accordance with EPA Documents 600/ 4-85-014 and 60U/4-8b-013. The most sensitive of these species will be selected to be the test species for the chronic toxicity tests. b. Monthly and quarterly results of the toxicity tests shall be reported to the Executive Officer with the monthly monitoring reports in the format specified in EPA Documents 600/4-85-014 and 6Uo-4-85-013. c. By 1 December 1988, the Discharger shall submit a Technical Report containing and analyzing the results of the toxicity testing, identi- fying the sources of toxicity ( if any) , and proposing necessary measures to eliminate toxicity (if any) , in accordance with "Technical Support Document for Water Quality Based Toxics Control " , U.S. Environmental Protection Agency, September 1985. This informa- tion will be reviewed and effluent limitations may be revised accordingly. At that time, the Board may revise this Order to reflect new limitations. 7. Compliance with this Order may not relieve the Discharger of its obliga- tions under Health and Safety Code Sections 25249.5 through 25249.13, the Safe Drinking Water and Toxic Enforcement Act of 1986 (Proposition 65) .