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ATTACHMENT B <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> GENERAL ORDER FOR LAND DISPOSAL <br /> OF GROUND WATER FROM CLEANUP OF <br /> PETROLEUM FUEL POLLUTION <br /> MODIFIED MONITORING AND REPORTING PROGRAM NO. 91-25015 <br /> EAST BAY MUNICIPAL UTILITY DISTRICT <br /> STOCKTON SERVICE CENTER <br /> SAN JOAQUIN COUNTY <br /> INFLUENT MONITORING <br /> Influent samples shall be collected after the last connection before the wastes enter the treatment <br /> process. Influent samples should be representative of the volume and nature of the influent. Time <br /> of collection of a grab sample shall be recorded. The following shall constitute the influent <br /> monitoring program: <br /> Type of Sampling <br /> Constituents Units Sample Frequency <br /> Total Petroleum Hydrocarbons mg/1 Grab Monthly <br /> Benzene ug/l Grab Monthly <br /> Ethylbenzene 4g/1 Grab Monthly <br /> Toluene ug/1 Grab Monthly <br /> Xylene Grab Monthly <br /> Lead (total)* kZg/1 Grab Monthly <br /> EFFLUENT MONITORING <br /> Effluent samples shall be collected downstream from the last'connection through which wastes can <br /> be admitted into the discharge. Effluent samples should be representative of the volume and nature <br /> of the discharge. Time of collection of a grab.sample shall be recorded. The following shall <br /> constitute the effluent monitoring program: <br />