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The duration of the sampling period shall be specified in the Monitoring and Reporting <br /> Program. The method of compositing shall be reported with the results. <br /> 7. Annual Pretreatment Report Requirements: <br /> (Applies to dischargers required to have a Pretreatment Program as stated in waste discharge <br /> requirements.) <br /> The annual report shall be submitted by 28 February and include, but not be limited to, the <br /> following items: <br /> a. A summary of analytical results from representative, flowproportioned, 24-hour <br /> composite sampling of the influent and effluent for those pollutants EPA has identified <br /> under Section 307(a) of the Clean Water Act which are known or suspected to be <br /> discharged by industrial users. <br /> The discharger is not required to sample and analyze for asbestos until EPA promulgates <br /> an applicable analytical technique under 40 CFR(Code of Federal Regulations) Part 136. <br /> Sludge shall be sampled during the same 24-hour period and analyzed for the same <br /> pollutants as the influent and effluent sampling and analysis. The sludge analyzed shall <br /> be a composite sample of a minimum of 12 discrete samples taken at equal time intervals <br /> over the 24-hour period. Wastewater and sludge sampling and analysis shall be <br /> performed at least annually. The discharger shall also provide any influent, effluent or <br /> sludge monitoring data for nonpriority pollutants which may be causing or contributing <br /> to Interference, Pass Through or adversely impacting sludge quality. Sampling and <br /> analysis shall be performed in accordance with the techniques prescribed in 40 CFR Part <br /> 136 and amendments thereto. <br /> b. A discussion of Upset, Interference, or Pass Through incidents, if any, at the treatment <br /> plant which the discharger knows or suspects were caused by industrial users of the <br /> system. The discussion shall include the reasons why the incidents occurred,the <br /> corrective actions taken and, if known, the name and address of the industrial user(s) <br /> responsible. The discussion shall also include a review of the applicable pollutant <br /> limitations to determine whether any additional limitations, or changes to existing <br /> requirements, may be necessary to prevent Pass Through, Interference, or noncompliance <br /> with sludge disposal requirements. <br /> c. The cumulative number of industrial users that the discharger has notified regarding <br /> Baseline Monitoring Reports and the cumulative number of industrial user responses. <br /> d. An updated list of the discharger's industrial users including their names and addresses, <br /> or a list of deletions and additions keyed to a previously submitted list. The discharger <br /> shall provide a brief explanation for each deletion. The list shall identify the industrial <br /> users subject to federal categorical standards by specifying which set(s) of standards are <br /> applicable. The list shall indicate which categorical industries, or specific pollutants from <br /> each industry, are subject to local limitations that are more stringent than the federal <br /> categorical standards. The discharger shall also list the noncategorical industrial users <br /> that are subject only to local discharge limitations.The discharger shall characterize the <br /> compliance status through the year of record of each industrial user by employing the <br /> following descriptions: <br />