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MONITORING AND REPORTAROGRAM ORDER NO. is -2- <br /> CITY <br /> 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. Freeboard and <br /> dissolved oxygen monitoring shall be performed at all treatment and evaporation/percolation ponds. <br /> Freeboard will be measured vertically from the surface of the pond water to the lowest elevation of the <br /> surrounding berm. Dissolved oxygen shall be measured at a point as far as practicable from the pond <br /> inlet and within one foot of the water surface. Industrial wastewater monitoring shall be performed in <br /> all months when industrial wastewater is being received or treated at the plant. Effluent monitoring <br /> shall include at least the following: <br /> Sample Sample Sampling Reporting <br /> Constituent Location Units Type Frequency Frequency <br /> Flow Meter GPD Metered Continuous Monthly <br /> Freeboard All Ponds Feet Measurement Weekly Monthly <br /> BODS' INF/EFF mg/1 Grab Bi-Monthly Monthly <br /> Dissolved Oxygen All Ponds mg/1 Grab Weekly Monthly <br /> Nitrates as 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/1 Grab Bi-Monthly Monthly <br /> Sodium INF/EFF mg/1 Grab Bi-Monthly Monthly <br /> Volatile Organic Compounds INF/EFF µg/1 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/1 Grab Bi-Monthly Monthly <br /> Standard Minerals INF/EFF mg/l Grab Annually Annually <br /> 1 BODS denotes five-day, 20° Celsius Biochemical Oxygen Demand. <br /> 2 Volatile Organic Compounds analysis by EPA Method 8010. <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 /> INF/EFF denotes sampling required for influent and effluent flows. <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 /> monitoring program shall include the parameters/chemical analyses listed below. Sample collection <br /> and analysis shall follow standard EPA protocol. Each groundwater monitoring well shall be <br /> monitored at least for the following: <br /> Constituents Units Type of Sample Sampling Reporting <br /> Frequency Frequency <br /> Groundwater Elevation 0.01 feet Measurement Quarterly Quarterly <br /> BODS' mg/l Grab Quarterly Quarterly <br />