SITE INFORMATION AND CORRESPONDENCE FILE 2

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MONITORING AND REPORTING PROGRAM ORDER NO. R5-2008-0149-010 5 CONOCOPHILLIPS SAN JOAQUIN COUNTY An ozone detection meter (field test instrument) will be continuously monitoring the breathing zones inside the remediation equipment area and at each injection wellhead during maintenance and monitoring field activities. Field test instruments (such as those used to test pH and dissolved oxygen) may be used provided that: 1. The operator is trained in proper use and maintenance of the instruments; 2. The instruments are calibrated prior to each monitoring event; 3. Instruments are serviced and/or calibrated by the manufacturer at the recommended frequency; and 4. Field calibration reports are submitted as described in item (b) of the 'Reporting" section of this MRP. DISCHARGE MONITORING 4. The Discharger shall monitor the amendments that are injected into the groundwater according to the requirements specified in Table 4. Each amendment addition shall be recorded individually, along with information regarding the time period over which the amendment was injected into the aquifer. Periods when the ozone treatment system is inoperative shall be noted with dates and times in the monitoring report. Table 4: Discharge Monitoring Requirements Parameters Units Type of Sample Ozone Gas Injected grams per day Measured Biocide Added grams per day Measured REPORTING 5. When reporting the data, the Discharger shall arrange the information in tabular form so that the date, the constituents, and the concentrations are readily discernible. The data shall be summarized in such a manner as to illustrate clearly the compliance with this Order. In addition, the Discharger shall notify the Regional Board within 48 hours of any unscheduled shutdown of any soil vapor and/or groundwater extraction system. The results of any monitoring done more frequently than required at the locations specified in the Monitoring and Reporting Program shall also be reported to the Regional Board. 6. As required by the California Business and Professions Code Sections 6735, 7835, and 7835.1, all reports shall be prepared by a registered professional or their subordinate and signed by the registered professional. 7. The Discharger shall submit quarterly electronic data reports, which conform to the requirements of the California Code of Regulations, Title 23, Division 3, Chapter 30. The quarterly reports shall be submitted electronically over the internet to the Geotracker database system by the 30th day of the month following the end of each calendar quarter, 30 April,30 July, 30 October, and 30 January, until such time as site conditions and Regional Board staff determine that modification to the reporting requirements are