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MONITORING AND REPORTING ijROGRAM NO.5-00-142 -2- <br /> CITY OF ESCALON <br /> WASTEWATER TREATMENT PLANT <br /> SAN JOAQUIN COUNTY <br /> samples shall be collected from the flow prior to addition of any WWTP recycled flow. Effluent <br /> samples shall be collected prior to discharge into the evaporation/percolation pond with the exception <br /> of effluent samples collected for BOD analysis. Discrete effluent BOD samples shall be collected from <br /> all the evaporation/percolation ponds that contain wastewater. The discrete effluent BOD samples <br /> shall be collected at a point as far as practicable from the pond inlet and within one foot of the water <br /> surface. Freeboard and dissolved oxygen monitoring shall be performed at all treatment and <br /> evaporation/percolation ponds. Freeboard will be measured vertically from the surface of the pond <br /> water to the lowest elevation of the surrounding berm.- Dissolved oxygen shall be measured at a point <br /> as far as practicable from the pond inlet and within one foot of the water surface. Industrial wastewater <br /> monitoring shall be performed in all months when industrial wastewater is being received or treated at <br /> the plant. Effluent monitoring shall include at least the following: <br /> Sample Sample Sampling Reporting <br /> Constituent Location Units Type Frequency Frequenc. <br /> Flow Meter GPD Metered Continuous Monthly <br /> Freeboard All Ponds Feet Measurement Weekly Monthly <br /> BOD5 t INF/Ponds mg/1 Grab' Bi-Monthly' Monthly <br /> Dissolved Oxygen All Ponds mg/l Grab Weekly ' Monthly <br /> Nitrate as Nitrogen INF/EFF mg/l Grab Bi-Monthly' Monthly <br /> Total Kjeldahl Nitrogen , INF/EFF mg/l Grab' Bi-Monthly' Monthly . <br /> Specific Conductivity INF/EFF µmhos/cm Grab Bi-Monthly Monthly <br /> pH INF/EFF pH units Grab Bi-Monthly' Monthly <br /> Chloride INF/EFF mg/l Grab Bi-Monthly' Monthly <br /> Sodium INF/EFF mg/l Grab Bi-Monthly, . Monthly <br /> Volatile Organic Compounds2 INF/EFF n/l Grab Bi-Monthly' Monthly <br /> Total Dissolved Solids INF/EFF mg/1 Grab Bi-Monthly' Monthly <br /> Fixed Dissolved Solids INF/EFF mg/1 Grab Bi-Monthly' Monthly <br /> Volatile Dissolved Solids INF/EFF mg/l Grab Bi-Monthly' Monthly <br /> Standard Minerals 3 INF/EFF mg/l Grab Annually Annually <br /> 1 BODS denotes five-day, 20° Celsius Biochemical Oxygen Demand. <br /> I - <br /> 2 Volatile Organic Compounds analysis by EPA Method 8010. <br /> 1 <br /> 3 Standard Minerals sample shall be collected in September or October and shall include, at a <br /> minimum, the following elements/compounds: Barium, Calcium,Magnesium, Sodium,Potassium, <br /> Chloride, Sulfate, Total Alkalinity(including alkalinity series), and Hardness. <br /> 4 Sampling frequency will change to "Monthly" starting in year 2001 and following years. <br /> R\TF/EFF denotes sampling required for influent and effluent flows. <br /> INF/Ponds denotes sampling required for influent flow and pond water quality. <br /> Bi-Monthly denotes sampling performed twice a month. <br /> GROUNDWATER MONITORING <br /> Groundwater samples shall be collected from each of the three groundwater monitoring wells currently <br /> installed, as well as all other wells installed subsequent to issuance of this MRP..The groundwater <br />