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MONITORING AND REPORTING PROGRAM -2 - PAT 2 - PAT MITCHELL AND CALIFORNIA NATURAL PRODUCTS WASTEWATER TREATMENT AND DISPOSAL FACILITY SAN JOAQUIN COUNTY Constituents Units Type of Sample Frequency Hydraulic Loading Rate inches/acre/month Calculated Monthly BODS Loading Rate lbs/acre/day Calculated' Daily Total Nitrogen Loading Rate lbs/acre/month Calculated, Monthly Runoff Visual Inspection Observation Daily' BOD5 loading shall be calculated using the daily applied volume of wastewater, estimated daily application area, and the most recent results of effluent BODS. , Total nitrogen loading rates shall be calculated using the daily applied volume of wastewater, estimated daily application area, and the most recent results of total nitrogen. ' Runoff monitoring of the landscaped areas shall be performed when irrigation of the areas occurs. Frequency of monitoring during the day shall be sufficient to determine if runoff is occurring. In addition, the Discharger shall maintain a log of discharges to the land application area and landscaped area. Notations shall be made in a bound log book and 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. LAND APPLICATION AREA SOILS MONITORING The Discharger shall establish, with concurrence of Board staff, four soil profile monitoring locations and one representative background location(i.e., in an area that historically has not received process wastewater). The samples shall be collected and analyzed for at least the following constituents immediately upon implementation of this MRP, and at the following frequency thereafter: Constituents Units Soil Profile Frequency Soil pH pH Standard' Annually, Volatile Solids % Total Weight Standard' Annually, Cation Exchange Capacity meq/100 g Standard' Annually, Nitrate(as N) mg/kg Standard' Annually, Kjeldahl-Nitrogen(as N) mg/kg Standard' Annually, 1 Samples shall be collected at 0.5 feet, 3 feet, and 6 feet. , Samples shall be collected in September. GROUNDWATER MONITORING Prior to sampling or purging, equilibrated groundwater elevations shall be measured to the nearest 0.01 foot. The wells shall be purged at least three well volumes until pH and electrical conductivity have stabilized. Sample collection shall follow standard analytical method protocols. Groundwater monitoring shall include, at a minimum, the following: