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MONITORING AND REPOP&G PROGRAM NO. 92-184 • -3- <br /> DEFENSE DISTRIBUTION M GION WEST - SHARPE <br /> WASTEWATER TREATMENT PLANT AND STORM WATER <br /> SAN JOAQUIN COUNTY <br /> STORM WATER MONITORING <br /> Storm water samples shall be collected from the last manhole prior to the <br /> outfall . Sampling shall be performed within the first hour of the storm event, <br /> whenever possible. Time of collection of samples shall be recorded. Storm water <br /> monitoring shall include at least the following: <br /> Sampling <br /> Constituents Units Type of Sample Frequency <br /> Suspended Solids mg/l Grab Twice Annually <br /> pH Number Grab Twice Annually <br /> Oil and Grease mg/1 Grab Twice Annually <br /> RECEIVING WATER MONITORING <br /> All receiving water samples shall be grab samples. Receiving water monitoring <br /> shall include at least the following: <br /> • Station Description <br /> R-1 500 feet upstream from the point of discharge <br /> R-2 500 feet downstream from the point of discharge <br /> R-3 500 feet downstream from the confluence of the South San <br /> Joaquin Irrigation Canal and French Camp Slough <br /> Sampling <br /> Constituents Units Station Frequency <br /> Dissolved Oxygen mg/1 R-1 , R-2, R-3 Weekly <br /> pH Number R-1 , R-2, R-3 Weekly <br /> Turbidity NTU R-1 , R-2, R-3 Weekly <br /> Temperature OF (CO) R-1 , R-2, R-3 Weekly <br /> Un-ionized Ammonia mg/l R-1 , R-2, R-3 Weekly <br /> as N (calculated)' <br /> Total Dissolved mg/l R-1 , R-2, R-3 Monthly <br /> Solids <br /> ' Temperature and pH shall be determined at the time of sample collection <br /> for the calculation of Un-ionized Ammonia <br />