SITE INFORMATION AND CORRESPONDENCE

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MONITORING AND REPOROG PROGRAM NO. R5-2010-0810 • - 6 - NESTLE 6 - NESTLE USA, INC. - RIPON SAN JOAQUIN COUNTY 9. Treatment system monitoring data shall be reported monthly. This includes the existing Stockton Avenue and Industrial Avenue treatment systems, the existing wellhead treatment systems on private supply wells, and any new treatment systems that the Discharger installs as part of the ongoing remedial actions. The Discharger shall submit monthly treatment system monitoring reports via email or mail by the 28th day of the following month. Monthly reports shall include the following minimum information: (a)A tabulation of all treatment system performance monitoring data, flow rates, and percent up time. (b) An explanation of any problems and/or treatment system down time, and corrective actions taken during the month. 10.Quarterly paper copy reports shall be submitted to this Central Valley Water Board office by 15 May (15 Quarter), 15 August (2nd Quarter), and 15 November (3`d Quarter) until such-time as the ExecutiveOfficerdetermine"trat the reports-are-no longer necessary. The 4th Quarter data shall be included in the Annual Report. Each report shall include the following minimum information: (a)A cover letter describing the groundwater sampling event and results, how and when samples were collected. (b) Groundwater potentiometric surface maps for all groundwater zones (Upper, Intermediate, Lower);. (c) A table showing well construction details such as well number, groundwater zone being monitored, ground surface elevation, reference elevation, elevation of screen, elevation of filter pack, and elevation of well bottom. (d) Data tables containing the water quality analytical results and depth to groundwater for that quarter. 11.An Annual Report shall be submitted to the Central Valley Water Board by 31 March of each year. The Discharger shall include data from all four quarterly sampling events. This report shall contain an evaluation of the effectiveness and progress of the investigation and remediation. The annual report shall contain the following minimum information: (a) both tabular and graphical summaries of all data obtained during the previous year; (b) groundwater potentiometric surface maps for each quarter and each aquifer zone-{Upper, Intermediate, Lower); (c) field logs that contain, at a minimum for each quarter, water quality parameters measured before, during, and after purging, method of purging, depth of water, volume of water purged, etc.;