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MONITORING AND REPORTING PROGRAM NO.
<br /> WESTERN FARM SERVICE,INC.
<br /> FORMER PUREGRO AGRICULTURAL CHEMICAL FACILITY
<br /> STOCKTON, SAN JOAQUIN COUNTY
<br /> SAMPLING FREQUENCY
<br /> Semi-annually' Annually2
<br /> Wells MW-2,MW-5,MW-6,MW-9,MW-10,MW-14A,MW-14B, MW-1,MW-3,MW-7,
<br /> MW-15A,MW-1513,MW-16A,MW-1613,MW-17A,MW-1713, MW-12,MW-13A,
<br /> MW-18A,MW-1813,MW-19A,MW-1913,MW-20A,MW-2013, MW-1311
<br /> MW-21,E-1,new wells'
<br /> All wells will be monitored semi-annually for water levels. Semi-annual sampling will occur during the first
<br /> and third quarters.
<br /> 2 Wells will be sampled annually during the third quarter.
<br /> 3 New wells may be sampled semi-annually only after one year of quarterly monitoring is completed.
<br /> Constituents EPA Analytical Method MDL T
<br /> Depth to Groundwater ---
<br /> Nitrate as Nitrogen 300.0 0.5 mg/1
<br /> Ammonia as Nitrogen 350.3 0.1 mg/1
<br /> EDB/DBCP 504' 0.02
<br /> Volatile Organic Compounds 8260B or 8021 0.5 µg/1'
<br /> Carbamate&Urea Pesticides 8321 1.0µg/l3
<br /> Chlorinated Herbicides 8151 0.5 µg/IS
<br /> MDL Maximum detection limit
<br /> mg/1 Milligrams per liter
<br /> µg/1 Micrograms per liter
<br /> 1,2,3-Trichloropropane shall be included in this analysis.
<br /> 2 For nondetectable results, with the exception of 1,1-dichloroethane,bromomethane,and
<br /> dichlorodifluoromethane,which have a MDL of 1.0µg/1.
<br /> 3 For nondetectable results,with the exception of barban,chlorpropham,mexacarbate,propachlor,
<br /> and propham,which have a MDL of 5.0µg/l.
<br /> Chlorinated herbicides shall be analyzed annually in all wells.
<br /> 5 For nondetectable results,with the exception of 2,4,5-T,2,4,5-TP,and dicamba,which have a
<br /> MDL of 0.1 µg/1;dalapon,which has a MDL of 1.0µg/1;Dinoseb,which has a MDL of 0.25 µg/1;
<br /> and MCPA and MCPP,which have a MDL of 100µg/1.
<br /> REPORTING
<br /> When reporting the data, the Discharger shall arrange the information in tabular form so that the
<br /> date, the constituents, and the concentrations are readily discernible. The data shall be
<br /> summarized in such a manner as to illustrate clearly the compliance with this Order. In addition,
<br /> the Discharger shall notify the Board within 48 hours of any unscheduled shutdown of any soil
<br /> vapor and/or groundwater extraction system.
<br /> As required by the California Business and Professions Code Sections 6735, 7835, and 7835.1,
<br /> all reports shall be prepared by a registered professional or their subordinate and signed by the
<br /> registered professional.
<br /> Semi-annual reports shall be submitted to the Board by 1 May and 1 November of each year
<br /> until such time as the Executive Officer determines that the reports are no longer necessary.
<br /> Each semi-annual report shall include the following minimum information:
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