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PART II - MONITORING REQUIRMENTS <br />A. Monitoring Frequency <br />1. The following parameters shall be monitored at the frequency and with the <br />sampling type stated below. All measurements, tests, and analyses of the <br />characteristics of water and wastes to which reference is made in this permit shall <br />be conducted using the methods and procedures approved in 40 CFR 136 and <br />amendments thereto, unless otherwise specified in an applicable Categorical <br />Pretreatment Standard. <br />The following parameters shall be monitored at sample site # 315 with the methods and at the frequency <br />stated below: <br />Sampling Fre Parameter _�_ __...n. mm....... <br />quency Sampling Type <br />Oil & Grease - Total <br />I <br />SemiAnnual <br />Grab <br />Oil & Grease TPH (ma <br />SemiAnnual <br />Grab <br />. ...SU_.._._.SemiAnnual <br />pH ( ) <br />..a .....w.. <br />_ Grab <br />.TTO.( g/ ... <br />* *) <br />SemiAnn.._..... <br />ual <br />_ _b...... ...... <br />Grab <br />�X len .. ( m.. /�)..,... .. <br />y e g <br />� <br />.__ SemiAnn... <br />ual <br />Grab <br />Flow, total (gpd) <br />Daily <br />Continuously <br />Flow Monthly (total) <br />Monthly <br />Continuously <br />See Flow Measurement Requirements referenced in Part III - Reporting Requirements. <br />** See Attachment 4 <br />B. Monitoring Definitions <br />1. Composite — Samples are obtained through flow -proportional sampling technique <br />over a 24-hour period or for the duration of discharge within the 24-hour sampling <br />period, including multiple batches of wastewater. If the permittee demonstrates <br />that time -proportional sampling is accurate or as representative as flow - <br />proportional sampling, then a time -proportional sample may be collected. <br />a. If the permittee chooses to demonstrate that time -proportional sampling <br />is accurate or as representative as flow -proportional sampling, the <br />permittee must submit a request, which includes the certification <br />statement found in Part III (A) (4) signed by the Authorized <br />Representative [see Part IV (B) (15)], within 120 days of the effective date <br />of this permit or they shall commence flow -proportional sampling at that <br />time. Request to conduct time -proportional sampling is subject to the <br />Control Authority approval. <br />St. John-Mittelhauser & Associates Industrial Wastewater Discharge Permit page 3 of 38 <br />