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i • REVISED MONITORING AND REPORTING PROGRAM NO. 91-223 -3- CANANDAIGUA WINE COMPANY SAN JOAQUIN COUNTY GROUNDWATER MONITORING Prior to sampling, the groundwater elevations shall be measured and the wells shall be purged at least three well volumes until pH and electrical conductivity have stabilized. Depth to groundwater shall be measured to the nearest 0.01 feet. Sample collection shall follow standard EPA protocols. Groundwater monitoring shall include, at a minimum, the following: Constituents Units Type of Sample Sampling and Reporting Frequency Groundwater Elevation 0.01 feet Measurement Quarterly Nitrate as Nitrogen mg/1 Grab Quarterly Total Kjeldahl Nitrogen mg/l Grab Quarterly Total Dissolved Solids mg/1 Grab Quarterly pH pH units Grab Quarterly Standard Minerals' mg/l Grab Annual Trihalomethanes2 µg/1 Grab Annual ' Standard Minerals shall include the following compounds: Calcium,Magnesium, Sodium,Chloride, Sulfate,Total Alkalinity(including alkalinity series),and Hardness. 2 Trihalomethanes to be performed by EPA Method 8010 or other analytical method approved by Board staff. LAND APPLICATION MONITORING Application of wastewater to the land application areas shall be monitored to prevent overloading the area with wastewater constituents which can cause objectionable odors and/or groundwater degradation. The following parameters shall be calculated and reported in the monthly monitoring reports: Constituents Units Type of Sample Reporting Frequency Freeboard Feet Measured Monthly Application Area acres Measured Monthly Hydraulic Loading Rate gallons/acre-day Calculated Monthly BODS Loading Rate lbs/acre-day Calculated' Monthly Total Nitrogen Loading Rate lbs/acre-day Calculated Monthly ' BOD5 loading shall be calculated using the daily applied volume of wastewater, estimated daily application area, and applicable results of effluent BODS. 2 Total nitrogen loading rates shall be calculated using the daily applied volume of wastewater, estimated daily application area, and applicable results of total nitrogen. In addition, the Discharger shall maintain a log of discharges to the land application area and landscaped area. Notations shall record which check is receiving wastewater, observations of ponding water, soil clogging, odors, insects, or other potential nuisance conditions. The notations shall also document any corrective actions taken. A copy of the entries made in the log during each month shall be submitted along with monthly monitoring reports.