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MONITORING AND REPORTING PROGRAM NO. 5-01-055 -3 - TRI 3 - TRI VALLEY GROWERS PLANT NO.4 STOCKTON, SAN JOAQUIN COUNTY 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: Sampling Reporting Constituent Units Type of Sample Frequency Frequency Groundwater elevation feet Measurement Quarterly Quarterly pH S.U. Grab Quarterly Quarterly Total Dissolved Solids mg/l Grab Quarterly Quarterly Fixed Dissolved Solids mg/l Grab Quarterly Quarterly Nitrate as Nitrogen mg/1 Grab Quarterly Quarterly Total Kjeldahl Nitrogen mg/l Grab Quarterly Quarterly Total Coliform Organisms MPN/100 ml Grab Quarterly Quarterly Trihalomethanesi µg/l Grab Annua12 Annual2 Analysis for this parameter shall be performed using EPA Method 8010 or equivalent. 2 Annual samples shall be collected in the first quarter(January-March)sampling event. LEACHFIELD MONITORING The domestic wastewater systems will be visually monitored on a monthly basis. Leachfield monitoring will consist of visual inspection of the leachfields and nearby area for the presence of wet areas, leachate or groundwater seepage, objectionable odors, and/or unexpected plant growth. Leachfield monitoring results shall be included with all monthly monitoring reports. REPORTING In reporting monitoring data, the Discharger shall arrange the data in tabular form so that the date, sample type (e.g., effluent, groundwater, etc.), and reported analytical result for each sample are readily discernible. The data shall be summarized in such a manner to clearly illustrate compliance with waste discharge requirements and spatial or temporal trends, as applicable. The results of any monitoring done more frequently than required by the Monitoring and Reporting Program, including wastewater data collected for industrial wastewater discharge permits, shall be reported in the next scheduled monitoring report. As required by the California Business and Professions Code Sections 6735, 7835, and 7835.1, all groundwater monitoring reports shall be prepared under the direct supervision of a California Registered Engineer or Geologist and signed by the registered professional. A. Monthly Monitoring Reports Monthly reports shall be submitted to the Regional Board on the 1St day of the second month following sampling (i.e. the January Report is due by 1 March). At a minimum, the reports shall include: 1. Results of effluent and flow monitoring.