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STANDARD PROVISIbN AND REPORTING REQUIREMENTS -� Waste Discharge to Land e. The"daily maximum" concentration is the highest measurement made on any single discrete sample or composite sample. f. A"grab"sample is any sample collected in less than 15 minutes. g. Unless otherwise specified, a composite sample is a combination of individual samples collected over the specified sampling period; (1) at equal time intervals,with a maximum interval of one hour (2) at varying time intervals (average in one hour or less) so that each sample represents an equal portion of the cumulative flow. The duration of the sampling period shall be specified in the Monitoring and Reporting Program. The method of compositing shall be reported with the results. 7. Annual Pretreatment Report Requirements: Applies to dischargers required to have a Pretreatment Program as stated in waste discharge requirements.) The annual report shall be submitted by 28 February and include, but not be limited to, the following items: a. A summary of analytical results from representative, flow-proportioned, 24-hour composite sampling of the influent and effluent for those pollutants EPA has identified under Section 307(a) of the Clean Water Act which are known or suspected to be discharged by industrial users. The discharger is not required to sample and analyze for asbestos until EPA promulgates an applicable analytical technique under 40 CFR(Code of Federal Regulations)Part 136. Sludge shall be sampled during the same 24-hour period and analyzed for the same pollutants as the influent and effluent sampling analysis. The sludge analyzed shall be a composite sample of a minimum of 12 discrete samples taken at equal time intervals over the 24-hour period. Wastewater and sludge sampling and analysis shall be performed at least annually. The discharger shall also provide any influent, effluent or sludge monitoring data for nonprioriry pollutants which may be causing or contributing to Interference,Pass Through or adversely impacting sludge quality. Sampling and analysis shall be performed in accordance with the techniques prescribed in 40 CFR Part 136 and amendments thereto. b. A discussion of Upset, Interference, or Pass Through incidents,if any, at the treatment plant which the discharger knows or suspects were caused by industrial users of the system. The discussion shall include the reasons why the incidents occurred, the corrective actions taken and, if known, the name and address of the industrial user(s)responsible. The discussion shall also include a review of the applicable pollutant limitations to determine whether any