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GENERAL i. ORDER -4- <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 /> Minimum <br /> Constituent/ Units Detection Limits <br /> Analysis Totals Solubles Totals, mg/kg Solubles, mg/1 <br /> pH pH units --- --- <br /> Elelctrical Conductivity µmhos/cm --- --- <br /> Pesticides and PCBs' mg/kg --- --- <br /> Net Acid Generating tons CaCO, --- --- <br /> Potential (Net AGP) <br /> Moisture Content Percent --- --- <br /> Antimony' mg/kg mg/1 0.006 <br /> ArseniC2 mg/kg mg/1 5.0 0.005 <br /> Barium2 mg/kg mg/1 <br /> Cadmium2 mg/kg mg/1 1.0 0.010 <br /> Chromium' mg/kg mg/1 2.0 0.050 <br /> Copper' mg/kg mg/1 1.0 1.0 <br /> Lead' mg/kg mg/1 5.0 0.050 <br /> Mercury2 mg/kg mg/1 0.02 0.002 <br /> Nickell mg/kg mg/1 5. 0.1 <br /> Thallium2 mg/kg mg/1 1.0 0.002 <br /> ZinC2 mg/kg mg/1 2.0 5.0 <br /> ' Pesticides and PCBs to be analyzed using analysis method 8080. <br /> ' Totals and soluble metal concentrations to be determined. Solubles to be determined after <br /> performing a Title 22 Waste Extraction Test (WET) Procedure. Total Dissolved Solids, pH, and <br /> EC measurements to be made of the extract. <br /> Samples shall be collected within six months following cessation of discharge of sediments. A <br /> minimum of three samples shall be collected from the site. Each sample shall be a composite of the <br /> vertical depth of the material. <br /> THREE SPECIES EFFLUENT TOXICITY MONITORING <br /> Effluent toxicity monitoring shall be conducted to determine whether the effluent is contributing <br /> toxicity to the San Joaquin River. The testing shall be conducted as specified in US EPA guidance <br /> â–ºnanual EPA 600/4-89/001. Effluent toxicity samples shall be collected from the sedimentation <br /> basin discharge prior to its entering the San Joaquin River. Grab samples shall be representative of <br /> the volume and quality of the discharge. Time of collection of samples shall be recorded. Effluent <br /> toxicity monitoring shall include the following: <br /> Species: Pimephales promelas, Ceriodaphnia, and Selenastrum <br /> Frequency: Once for each project within 7 days after the start of discharge. <br /> Dilution Series: Initial testing shall be on 100% effluent. If toxicity is found, then <br /> retesting must immediately be done using the following dilution series. <br />