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Tri-Pac Inc. Industrial Wastewater Discharge Permit page 9 of 36 <br />PART II - MONITORING REQUIRMENTS <br /> <br />A. Monitoring Frequency <br /> <br />1. The following parameters shall be monitored at the frequency and with the sampling type stated <br />below. All measurements, tests, and analyses of the characteristics of water and wastes to which <br />reference is made in this permit shall be conducted using the methods and procedures approved <br />in 40 CFR 136 and amendments thereto, unless otherwise specified in an applicable Categorical <br />Pretreatment Standard. <br /> <br /> The following parameters shall be monitored at Sample Site Outfall # 001 with the methods and at the frequency stated <br />below: <br />Parameter Sampling Frequency Sampling Type <br />Flow, total (gpd) Daily Continuously <br />Flow Monthly (gal) Monthly Continuously <br />Arsenic (mg/L) Quarterly Composite <br />Cadmium (mg/L) Quarterly Composite <br />Chromium (mg/L) Quarterly Composite <br />Copper (mg/L) Quarterly Composite <br />Lead (mg/L) Quarterly Composite <br />Mercury (mg/L) Semi-Annual Grab <br />Nickel (mg/L) Quarterly Composite <br />Silver (mg/L) Semi-Annual Composite <br />Zinc (mg/L) Quarterly Composite <br />Ammonia, Nitrogen (mg/L) Quarterly Composite <br />BOD5 (mg/L) Quarterly Composite <br />Oil and Grease (mg/L) Quarterly Grab <br />Oil and Grease TPH (mg/L) Quarterly Grab <br />pH Quarterly Grab <br />Phosphorus (mg/L) Quarterly Composite <br />T. Suspended Solids (mg/L) Quarterly Composite <br />Acetone (mg/L) Quarterly Grab <br />n-Amyl Acetate (mg/L) Quarterly Grab <br />Ethyl Acetate (mg/L) Quarterly Grab <br />Isopropyl Acetate (mg/L) Quarterly Grab <br />Methylene Chloride (mg/L) Quarterly Grab <br /> <br />See Flow Measurement Requirements referenced in Part III - Reporting Requirements. <br />