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<br /> MONITORING AND REPORTI. ?ROGRAM NO. R5-2003-0815 -2-
<br /> WESTERN
<br /> 2-WESTERN FARM SERVICE,INC.
<br /> VERNALIS FACILITY, SAN JOAQUIN COUNTY
<br /> GROUNDWATER MONITORING PROGRAM
<br /> Maximum
<br /> Detection
<br /> Constituents Method Limit' Frequency
<br /> Depth to Groundwater --- 0.01 R Semi-Annually 2
<br /> Total Oxidizable Nitrogen EPA 353.2 0.1 mg/1 Semi-Annually 2
<br /> Ammonium EPA 350.1 0.5 mg/1 Semi-Annually 2
<br /> Carbamate/Urea Pesticides EPA 8321 1 µg/13 Semi-Annually 2
<br /> Chlorinated Herbicides EPA 8151 1 µg/1 Semi-Annually 2,4
<br /> (MW-2 and MW-3 only)
<br /> Fumigants(including 1,2,3-trichloropropane) EPA 504.1 0.02 µg/1 Semi-Annually 2
<br /> Volatile Organic Compounds EPA 8021B or 0.5 µg/l 6 Semi-Annually 2
<br /> (including 1,2-DCP and toluene 5) 8260B
<br /> For non-detectable results.
<br /> 2 In the first quarter(January-March)and in the third quarter(July-September).
<br /> 3 Detection limits for Barban,Chlorpropham,Mexacarbate,Propachlor,and Propham are 5 µg/1.
<br /> 4 If chlorinated herbicides are not detected in either of the two wells for two consecutive monitoring events,the analytical
<br /> suite may be removed from the schedule for that well.
<br /> 5 Toluene shall be included in the analytical suite for MW-2 and MW-3 only. If toluene is not detected in either of the two
<br /> wells for two consecutive monitoring events,the analyte may be removed from the schedule for that well.
<br /> 6 Detection limits for bromomethane and dichlorodifluoromethane are 1 µg/l,and for methylene chloride is 5 gg/l.
<br /> REMEDIATION PILOT STUDY MONITORING
<br /> The remediation pilot study monitoring program includes monitoring wells MW-2, MW-4, MW-5, and
<br /> MW-6. The remediation pilot study monitoring program for the four monitoring wells shall follow the
<br /> schedule below. Some of the analyses for the remediation pilot study monitoring program are
<br /> duplicative of those required for the groundwater monitoring program and are repeated only for clarity.
<br /> Two separate analyses are not required. Remediation pilot study monitoring may be discontinued when
<br /> Board staff concurs that the pilot study is concluded.
<br /> REMEDIATION PILOT STUDY MONITORING PROGRAM
<br /> Method
<br /> Detection MW-4, MW-2,
<br /> Constituents Method(s) Limit' MW-5 MW-6
<br /> Depth to Groundwater --- 0.01 ft Quarterly Quarterly
<br /> Dissolved gases(methane,carbon dioxide) ASTM D1945,RSK 175M 0.02 mg/I Annually',' Quarterly
<br /> General Minerals(nitrate plus nitrite,ammonium, EPA 350,353.2, 376.2, 0.1 mg/l4 Annually2,3 Quarterly
<br /> alkalinity,chloride,sulfide,sulfate) 415,9056, 9060,
<br /> SM 4500,2320,5310
<br /> Dissolved Metals(arsenic,chromium,copper,iron, EPA 200.7,601013,7060A, 0.01 mg/15 Annually2'3 Quarterly
<br /> manganese, mercury,nickel,zinc) 7470A
<br /> Total Metals(iron,manganese) EPA 200.7 0.03 mg/l Annually2,3 Quarterly
<br /> Metabolic Acids(acetic,butyric,lactic,propionic) HPLC/UV 10 mg/l Annually2,3 Quarterly
<br /> Volatile Organic Compounds(including 1,2-DCP and EPA 8260B 1 µg/l Annually2,3 Quarterly
<br /> 1,2,3-trichloropropane)
<br /> Footnotes are on following page
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