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MON'ITOAr G AND REPORTING Pi._JRAM NO. 5-00-226 -2- SAN JOAQUIN DEPT. OF PUBLIC WORKS COUNTY SERVICE AREA NO.44 CASTELLO ESTATES AKA APRICOT ACRES SAN JOAQUIN COUNTY Sampling Reporting Constituent Units Type of SamQle Frequency Frequency Ammonia as Nitrogen mg/1 Grab Quarterly Quarterly Total Coliform Organisms MPN/100 ml Grab Quarterly Quarterly Trihalomethanesl ug/l Grab Annually Annually, 1 Trihalomethane analysis shall be performed if disinfection procedures include the use of chlorine. Analysis for this parameter shall be performed using EPA Method 8010 or equivalent. 2 Annual samples shall be collected in the first quarter sampling event. REPORTLNG In reporting monitoring data, the Discharger shall arrange the data in tabular form so that the date, sample type (e.g., effluent, pond, 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 at the locations specified in the Monitoring and Reporting Program 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 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 monitoring. 2. A comparison of monitoring data to the discharge specifications and an explanation of any violation of those requirements. Data shall be presented in tabular format. 3. If requested by staff, copies of laboratory analytical report(s). 4. A calibration log verifying calibration of all monitoring instruments and devices used to perform the prescribed monitoring program. B. Quarterly Monitoring Reports The Discharger shall establish a quarterly sampling schedule for groundwater monitoring such that samples are obtained approximately every three months. Quarterly monitoring reports shall be submitted to the Board by the 1" day of the second month following the end of the quarter (i.e. the January-March quarter is due by May 1St) and may be combined with the monthly report. The Quarterly Report shall include the following: