FIELD DOCUMENTS AND WORK PLANS 1991

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WASTE DISCHARGE REQUIREMENTS -5- MARLEY COOLING TOWER COMPANY SAN JOAQUIN COUNTY 21. The action to adopt a modification to an existing NPDES permit is exempt from the provisions of the California Environmental Quality Act (Public Resources Code Section 21000, et seq. ) , in accordance with Section 13389 of the California Water Code. 22. The Board has notified the Discharger and interested agencies and persons of its intent to modify the existing NPDES permit for this Discharger and has provided them with an opportunity for a public hearing and an opportunity to submit their written views and recommendations. 23. The Board, in a public meeting, heard and considered all comments pertaining to the discharge. 24. This Order shall take effect ten days from the date of hearing, provided EPA has no objections. IT IS HEREBY ORDERED that The Marley Cooling Tower Company, Stockton, in order to meet the provisions contained in Division 7 of the California Water Code and regulations adopted thereunder, shall comply with the following: 1. All of the prohibitions, effluent limitations, sludge disposal conditions, receiving water limitations, and provisions contained in Board Order No. 88-124 except for the following modifications of Effluent Limit 4 and Provision 6, respectively: a. The 30-day average daily discharge shall not exceed 0.59 million gallons. b. The Discharger shall implement an invertebrate follow-up effluent toxicity monitoring program on the combined effluent from the existing and interim treatment plants, in accordance with procedures outlined in the Environmental Protection Agency' s (EPA) Documents 600/4-89/001 and 440/4-85-032 to demonstrate that the combined effluent does not have a reasonable potential to cause instream toxicity. The Discharger shall propose a plan with a time schedule to meet this objective. The Discharger shall carry out the toxicity monitoring program in accordance with the following schedule: 1) By 1 February 1991, a proposed plan shall be submitted to the Board for approval . The Plan shall be implemented after approval . 2) By 1 July 1991, a Technical Report summarizing and interpreting the results of the toxicity testing program shall be submitted. This information will be reviewed and effluent limitations may be revised accordingly. At that time, the Board may revise this Order to reflect the new limitations.