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GENERAL ORDER -2- <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 /> SEDIMENTATION BASIN DISCHARGE MONITORING <br /> At least one week prior to the anticipated discharge to the San Joaquin River, samples shall be <br /> collected from the sedimentation basin for the General Parameters. Subsequent samples shall be <br /> collected from the basin water spilling from the sedimentation basin and analyzed according to the <br /> following schedule: <br /> Constituent/ Sampling Minimum <br /> Analysis Units Frequency Detection Limit, me/1 <br /> General Parameters <br /> Flow MGD Daily <br /> pH pH units Daily <br /> Suspended Solids mg/1 Daily <br /> Electrical Conductivity µmhos/cm Daily <br /> Turbidity NTUs Daily <br /> Dissolved Oxygen mg/l Daily <br /> BODS mg/l Biweekly' <br /> Ammonia mg/l Biweekly' <br /> Trace Metals <br /> Antimony' mg/l Biweekly' 0.006 <br /> Barium' mg/l Biweekly' 1.0 <br /> Arsenic2 mg/l Biweekly, 0.001 <br /> Cadmium2 mg/l Biweekly, 0.0005 <br /> Chromium2 mg/l Biweekly, 0.001 <br /> Copper, mg/1 Biweekly, 0.001 <br /> Lead, mg/l Biweekly, 0.002 <br /> Mercury2 mg/l Biweekly' 0.0002 <br /> Thallium, mg/l Biweekly' 0.0002 <br /> Nickell M9/I Biweekly' 0.005 <br /> ZinC2 ma/l Biweekly' 0.002 <br /> Every two weeks starting with the first day of spilling to the river. <br /> Total and dissolved concentrations shall be determined. <br /> RECEIVING WATER MONITORING FOR THE DMD SITE DISCHARGE <br /> Grab samples shall be taken at five feet below the surface of the water and ten feet from the channel <br /> bottom. Two grab samples from each station shall be composited together in equal volumes <br /> resulting in one sample from each station for analysis. Water samples shall be taken from the <br /> following stations: <br />