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GENERAL PRETREATMENT INDUSTRIAL USERS <br /> 11 <br /> PERMIT CONDITIONS ���,,•.,,� ' <br /> APR 8 Rql <br /> CONTAMINATED GROUND WATER ENVIRONMENTAL HEALTH! <br /> INTERIM SAMPLING SCHEDULE ;i PE(�f�lIITi,S,:= ;;/; ES i <br /> Permittee shall establisha self-monitoring schedule as I <br /> indicated: <br /> COMPONENT FREQUENCY TYPE SAMPLE COMMENTS <br /> Trace metals: 1 x month* 24 hr Rotating days <br /> Cadmium composite <br /> Chromium <br /> Copper <br /> Lead <br /> Nickel <br /> Zinc <br /> Total Petroleum <br /> Hydrocarbons 2 x month* Grab I . <br /> j <br /> Total Toxic <br /> Organics 1 x year Grab <br /> Volatile <br /> Hydrocarbons 2 x month* Grab <br /> Benzene, Toulene <br /> & Xylene 2 x month* Grab <br /> *Permittee shall devise a schedule of rotatini days for <br /> sampling purposes subject to approval by City of Stockton <br /> Environmental Control Staff. An example of rotating days for <br /> once per month would be ''the first of the month for one month, <br /> the fifth for the second month, and the fifteenth for the <br /> third month. <br /> Permittee shall send reports on a monthly basis . Reports are <br /> due on the fifteenth day of the following month. <br /> The monthly report shall also include average gal/min dis- <br /> charged to the sewer and total flow discharged for the month. <br /> LDW: tw <br /> 5/88 <br />