SITE INFORMATION AND CORRESPONDENCE

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MONITORING AND REPORT PROGRAM NO. R5-2004-0806 -2- JOHN 2 - JOHN TAYLOR FERTILIZERS, INC., WILBUR-ELLIS COMPANY STOCKTON FACILITY, SAN JOAQUIN COUNTY detected in both these events in a new monitoring well, that analytical suite may be removed from the monitoring schedule for that well with Board staff concurrence. Sample collection and analysis shall follow standard EPA protocol. Groundwater Monitoring Schedule Constituents EPA Analytical Max. Detection Sampling Method Limit' Frequency Depth to Groundwater --- 0.01 foot Semi -Annually' Total Oxidizable Nitrogen 353.2 1.0 mg/1 Semi -Annually z Volatile Organic Compounds 8260B 0.5 µg/13 Semi -Annually 2 Fumigants 504.1 0.02 µg/1 Semi -Annually z (including 1,2,3-trichloropr6pane) Chlorinated Herbicides 8151 0.5 µg/14 Semi -Annually 2 Triazine Compounds 619 0.5 ug/1 Semi -Annually z Carbamate/Urea Compounds 8321 1 µg/15 Semi -Annually 2 1 For non-detectable results 2 Wells shall be sampled semi-annually during the first and third quarters. 3 Detection limit for bromomethane, dichlorodifluoromethane, Freon 113 and MTBE is 1 µg/l 4 Detection limit for 2,4 -DB and dalapon is 1 µg/1, and for MCPA and MCPP is 100 pg/1. 5 Detection limit for barban, chlorpropham, mexacarbate, propachlor and propham is 5 pg/1. 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 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. Semi-annual reports shall be submitted to the Board by the 1st day of the second month following the end of each respective calendar quarter (i.e., by 1 May and 1 November) 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.;