Laserfiche WebLink
CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> MONITORING AND REPORTING PROGRAM NO. <br /> NPDES NO. CA0081787 <br /> FOR <br /> THE MARLEY COOLING TOWER COMPANY <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> EFFLUENT MONITORING <br /> Effluent samples shall be collected in the North Yard pipeline that conveys <br /> effluent to the Stockton Diverting Canal . Effluent samples should be repre- <br /> sentative of the volume and nature of the discharge. Time of collection of a <br /> grab sample shall be recorded. The following shall constitute the effluent <br /> monitoring program: <br /> Constituents Units Type of Sample SamplingFrequency <br /> Total Chromium mg/l Grab *Once per week <br /> Hexavalent Chromium mg/l Grab *Once per week <br /> Arsenic <br /> Copper mg/1 Grab *Once per week <br /> PP mg/l Grab *Once per week <br /> Specific Conductivity umhos/cm Grab *Once per week <br /> pH ph Units Grab *Once per week <br /> Flow mgd Cumulative Continuous <br /> Bioassay % Survival Grab Once per year <br /> Priority Pollutant Scan ug/l** Grab Once per year <br /> A visual inspection of the chromium monitor, the conductivity monitor, and <br /> the treatment system shall be performed daily when the treatment system is in <br /> operation. <br /> * During the first 24 hours of a storm-induced discharge from the treatment <br /> system, three samples shall be collected at 8-hour intervals and composi- <br /> ted. After this 24-hour period, samples shall be collected once per <br /> week. <br /> ** Or Method Detection Limit. <br />