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MONITORING AND REPORTING PROGRAM NO. R5-2005-XXXX -2- PIONEER 2-PIONEER AMERICAS LLC TRACY,SAN JOAQUIN COUNTY Constituents EPA Analytical Method Maximum Practical Quantitation Sampling Limit(mg/1)' Frequency Depth to Groundwater --- --- Quarterly Volatile Organic Compounds 8021 or 8260B 0.5 ug/l Quarterly Chloride 300.0 10 Seii-Annual2 Sodium 6010 10 Semi-Annual2 Total Organic Carbon 415.1 20 Semi-Annual2 Total Dissolved Solids 160.1 20 Semi-Annual2 Nitrate&nitrite 300.0 0.1 Semi-Annual2 Sulfate 300.0 0.2 Semi-Annua12 Sulfite 377.1 6 Semi-Annual2 Total Iron 6010A 0.02 Semi-Annua12 Dissolved Iron 6010A 0.02 Semi-Annual2 Ferrous Iron Direct Field Measurement 0.1 Semi-Annual2 Total Alkalinity 310.1 5 Semi-Annual2 1 For nondetectable results. All concentrations between the Method Detection Limit and the Practical Quantitation Limit shall be reported as trace. 2 Samples collected during the first and third quarters. mg/l milligrams per liter ug/1 micrograms per liter REPORTING 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. 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. The Discharger shall submit semi-annual electronic data reports,which conform to the requirements of the California Code of Regulations, Title 23, Division 3, Chapter 30. The semi-annual reports shall be submitted electronically over the internet to the Geotracker database system by 1 February and 1 August until such time as the Executive Officer determines that the reports are no longer necessary. Semi-Annual reports shall be submitted to the Regional Board by the by 1 February and 1 August until such time as the Executive Officer determines that the reports are no longer necessary. Each semi-annual report shall include the following minimum information: (a) a description and discussion of the groundwater sampling event and results, including trends in the concentrations of pollutants and groundwater elevations in the wells, how and when samples were collected, and whether the pollutant plume(s) is delineated; (b) field logs that contain, at a minimum, water quality parameters measured before, during, and after purging,method of purging, depth of water, volume of water purged, etc.;