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GENERAL ORDER -3- <br /> MONITORING AND REPORTING PROGRAM <br /> US ARMY CORPS OF ENGINEERS <br /> PORT OF STOCKTON <br /> MAINTENANCE DREDGING STOCKTON DEEP WATER SHIP CHANNEL <br /> CONTRA COSTA, SACRAMENTO & SAN JOAQUIN COUNTIES <br /> Station Description <br /> R-3 Upcurrent of the discharge location and undisturbed by the <br /> discharge of the return water from the sedimentation basin(s). <br /> R-4 300 feet down current of the discharge point. <br /> Samples shall be collected and analyzed from Stations R-3 and R-4 as follows: <br /> Constituent/ Sampling Minimum <br /> Analysis Units Fmquency Detection Limit. (mg/1) <br /> Turbidity NTUs Daily <br /> Dissolved Oxygen mg/l Daily <br /> pH pH units Twice a Week <br /> Suspended Solids mg/l Twice a Week <br /> Electrical Conductivity µmhos/cm Twice a Week <br /> Hardness, as CaCO3 mg/l Biweekly <br /> Antimony mg/l Biweekly 0.006 <br /> Barium mg/l Biweekly 1.0 <br /> Total Cadmium mg/l Initiation of discharge 0.0005 <br /> Total Chromium mg/l Initiation of discharge 0.001 <br /> Total Nickel mg/l Initiation of discharge 0.005 <br /> Total Arsenic mg/l Biweekly 0.001 <br /> Total Copper mg/l Biweekly 0.001 <br /> Total Mercury mg/l Biweekly 0.0002 <br /> Total Lead mg/l Biweekly 0.002 <br /> Total Thallium mg/l Biweekly 0.001 <br /> Total Zinc mg/l Biweekly 0.002 <br /> DREDGED MATERIAL DISPOSAL SITE SEDIMENT MONITORING <br /> The dredged sediments remaining at the Dredged Material Disposal Sites may be required to be <br /> tested after dredging operations. If so requested by the staff of the Regional Board, the testing shall <br /> be as follows: <br />