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MONITORING AND REPORT PROGRAM NO. 5-01-818 • JOHN TAYLOR FERTILIZERS CO., INC., WILBUR-ELLIS COMPANY STOCKTON FACILITY, SAN JOAQUIN COUNTY -2' Constituents EPA Analytical Max. Detection Sampling Method Limit 1 Frequency Depth to Groundwater --- 0.01 foot Quarterly Total Oxidizable Nitrogen 353.2 1.0 mg/l Quarterly Ammonium as Nitrogen 350.1 0.5 mg/l Quarterly Volatile Organic Compounds 8260B 0.5 µg/lZ Quarterly Fumigants 504.1 0.02 µg/1 Quarterly Chlorinated Herbicides 8151 0.5 µg/13 Quarterly4 Total Petroleum Hydrocarbons 8015M 50 µg/1_ Quarterly4 as Diesel Total Petroleum Hydrocarbons 8015/5030 20 µg/1 Quarter1y4 as Gasoline Organophosphorous Pesticides 8141 0.5 µg/15 Quarterly4 Carbamate/Urea Compounds 8321 1 µg/16 Quarterly4 ` For nondetectable results. z Detection limits for bromomethane, dichlorodifluoromethane, Freon 113 and MTBE are 1 µg/1. 4 Detection limits for 2,4 -DB and dalapon are 1 µg/1, for MCPA and MCPP are 100 µg/1. If any of these analytical suites are not detected in MW -2 or MW -3 for four consecutive quarters, and if the groundwater direction does not vary more than 45 degrees from northeast, then that analytical suite may be dropped from the schedule for these two wells. 5 Detection limits for coumaphos, demeton-s, and dichlorvos are 1 µg/l, for fensulfothion and naled are 2.5 µg/1, for mevinphos is 3.5 µg/l, and for azinphosmethyl is 5 µg/1. 6 Detection limits for barban, chlorpropham, mexacarbate, propachlor and propham are 5 µg/1. REPORTING When reporting 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. 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.