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NPDES Monitoring Requirement 10 September 2001 <br /> Attachment E-1 — SamplinQ Frequency and Number of <br /> Samples (\Enor Industrial) <br /> Samples shall be collected from the e.-.tent and upstream receiving water and analyzed <br /> for the constituents listed in Attach-_ H to provide the indicated number of valid <br /> sample results by the submittal due Sampling frequency shall be adjusted so that <br /> the appropriate number of samples is :cllected by the due date and so that the sampling is <br /> representative of the wastewater disc.ge. <br /> Constituent/Sample Frequency Timeframe Total <br /> Type' (years) Number of <br /> Samples <br /> Volatile Quart-:' 1 4 <br /> Organics/grab <br /> Semi-Volatile Qua .er:. 1 4 <br /> Organics/grab or <br /> composite <br /> Inorganics/grab or ' Qua-_e__. 1 4 <br /> com osite I <br /> Pesticides 2 & Qua- 1 i 4 <br /> PCBs/grab or <br /> composite <br /> Other I Quan 1 4, <br /> Constituents3/grab i <br /> or composite <br /> Discharge & ( Mo__ 1 12 <br /> Receiving <br /> Water Flow° <br /> Dioxins/grab or Semi-a�ual 1 2 <br /> composite <br /> ' The effluent sampling station azd=-e upstream receiving water station <br /> p _ ng p � specified in the <br /> z NPDES Permit Monitoring and Rrorting Program should be used. <br /> 3 OP pesticides (diazinon, chlorp_:= s) are not required of industrial facilities. <br /> See list in Attachment II. <br /> ° Discharge and Receiving Water^_w. Discharge flow should be recorded and <br /> reported for each day of sample ccection. All NPDES dischargers should have a <br /> means of measuring the volume c_discharge as part of their monitoring already <br /> required by the NPDES Permit Nf:mtoring and Reporting Program. Receiving Water <br /> Flow, however, is not generally rq tired by NPDES Permit Monitoring Programs. <br /> For facilities that alreadv cons_-eceiving water flow monitoring, the receiving <br /> water flow should be recorded a=d reported for each day in which sampling occurs. <br /> For facilities that do not routine_^:conduct receiving water flow monitoring, provide <br /> the best estimate of flow reasora-�obtainable. It may be possible to obtain flow <br /> data from an existing nearby gau_g station. <br /> lofl <br />