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Pretreatment Industrial Users <br /> General Permit Conditions Page <br /> 4of14 <br /> Control Board's Division of Drinking Water Environmental Laboratory Accreditation 1 <br /> Program (ELAP)for the specific analysis conducted. <br /> h. Acceptable methods for the analysis of wastewater required in the Wastewater <br /> Discharge Permit Self-Monitoring Sample Program shall be limited to those listed <br /> in 40 CFR Part 136. Permittee shall insure that all handling, preservation, and <br /> laboratory analysis of collected samples is performed in accordance with 40 CFR <br /> Part 136 and amendments thereto, unless otherwise specified in the monitoring <br /> conditions of this permit. <br /> i. Collection times for self-monitored composite and grab samples shall be <br /> determined by Environmental Control staff on a case-by-case basis. The <br /> composite and grab samples shall not be collected prior to the designated <br /> collection time. <br /> j. All samples collected (grab and composite) shall be thoroughly mixed and <br /> representative of the volume and nature of the discharge for the sampling and <br /> reporting period. <br /> k. Samples from batch discharges shall be collected from a dedicated final effluent <br /> batch holding tank which shall be the last connection through which process <br /> wastewater can be discharged into the sanitary sewer system. Contents of the <br /> batch holding tank shall be thoroughly mixed and shall provide a sample which is <br /> representative of the volume and nature of the discharge for the sampling and <br /> reporting period. <br /> I. All sampling chain-of-custody forms must be completed as specified in the City of <br /> Stockton Quality Assurance Manual for Self-Monitored Industries (included with <br /> this permit)and, at a minimum, shall include: <br /> 1. Clearly identified sample source location identification (including <br /> any QC designation). <br /> 2. Precise dates and times of sample collection. <br /> 3. Sample type: composite or grab. <br /> 4. Start and stop times of composite samples. <br /> 5. Sample container composition: glass, plastic, etc. <br /> 6. Number of sample containers. <br /> 7. Sample preservation methods, including temperature. ' <br /> 8. Tests performed and corresponding specific analytical methods <br /> (EPA, Standard Methods, etc.). <br /> 9. Proper chain of custody signatures, dates and times. <br /> M. Sampling frequency and reporting will be determined on a case-by-case basis, but <br /> must at least comply with 40 CFR 403.12 (g) "Monitoring and Analysis to <br /> Demonstrate Continued Compliance" and any specific federal, state and local <br /> requirements. <br /> 1 <br />