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NPDES Monitoring Requirement <br /> 17 December 2001 <br /> Controlling Water Quality Criterion for <br /> Surface Waters <br /> ntenonrrtenon <br /> Concentration Quantitation <br /> CTR (ug/L or noted) Limit(ug/L or Suggested Test <br /> # Constituent CAS Number Basis (1) noted) Methods <br /> OTHER CONSTITUENTS <br /> Ammonia(as N) 7664417 Ambient Water Quality 1500(4) EPA 350.1 <br /> Chloride 16887006 Agricultural Use 106,000 EPA 300.0 <br /> Flow 1 CFS <br /> Hardness(as CaCO,) 5000 EPA 130.2 <br /> Foaming Agents(MEAS) Secondary MCL 500 SM5540C <br /> Nitrate(as N) 14797558 Primary MCL -_10,000 2,000 EPA 300.0 <br /> Nitrite(as N) 14797650 _ Primary MCL 1000 400 EPA 300.0 <br /> PH Basin Plan Objective 6.5-8.5 1 0.1 EPA 150.1 <br /> Phosphorus,Total(as P) 7723140 USEPA IRIS0.14 EPA 365.3 <br /> Specific conductance(EC) Agricultural Use 700 umbos/em EPA 120.1 <br /> Sulfate Secondary MCL 250,000 500 EPA 300.0 <br /> Sulfide(as S) Taste and Odor 0.029 EPA 376.2 <br /> Sulfite(as S03) No Criteria Available SM4500-SO3 <br /> qTenaperuture Basin Plan Objective °F <br /> al Disolved Solids(TDS) I Agricultural Use 450,000 EPA 160.1 <br /> FOOTNOTES: <br /> (1) -The Criterion Concentrations serve only as a point of reference for the selection of the appropriate analytical <br /> method. They do not indicate a regulatory decision that the cited concentration is either necessary or sufficient for <br /> full protection of beneficial uses. Available technology may require that effluent limits be set lower than these <br /> (2)-Freshwater aquatic life criteria for metals are expressed as a function of total hardness(mg/L)in the water body. <br /> Values displayed correspond to a total hardness of 40 mg/L. <br /> (3)-For haloethers <br /> (4)-Freshwater aquatic life criteria for ammonia are expressed as a function of pH and temperature of the water <br /> body. Values displayed correspond to pH 8.0 and temperature of 22 C. <br /> (5)-For nitrophenols. <br /> (6)-For chlorinated naphthalenes. <br /> (7)-For phthalate esters. <br /> (8)-Basin Plan objective=2 ug/L for Salt Slough and specific constructed channels in the Grassiand watershed, <br /> (9)-Criteria for sum of alpha-and beta- forms. <br /> (10)-Criteria for sum of all PCBs. <br /> (11)-Mercury monitoring shall utilize "ultra-clean" sampling and analytical methods.These met cods include: <br /> Method 1669: Sampling Ambient Water for Trace Metals at EPA Water Quality Criteria Levels. [—'S LPA: and <br /> Method 1631:Mercury in Water by Oxidation,Purge and Trap,and Cold Vapor Atomic Fluoresence,US EPA <br /> - SofS <br />