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MONITORING AND REPORTING PROGRAM NO. 90-803 _p- DALLAS CORPORATION, DBA OVERHEAD/ LODI DOOR COMPANY, SAN OOAQUIN COUNTY c. Casing volume. d. Number of casing volumes purged. e. Electrical Conductivity, pH, and temperature of water taken at regular intervals throughout the purging process (at the beginning of purging and after each casing volume) . Wells shall be purged a minimum of three casing volumes and until EC, pH, and temperature have stabilized. 3. Water samples shall be analyzed for the following: MINIMUM" CONSTITUENT DETECTION LIMIT UNITS FREQUENCY pH pH units quarterly Total Dissolved Solids mg/l quarterly Electrical Conductivity µS/cm quarterly Total Alkalinity mg CaCO,/l annually, 1st quarter Calcium mg/l , meq/1 annually, 1st quarter Magnesium mg/1 , meq/1 annually, 1st quarter Sodium mg/l , meq/1 annually, 1st quarter Potassium mg/1 , meq/1 annually, 1st quarter Carbonate mg/l , meq/1 annually, 1st quarter Bicarbonate mg/1 , meq/1 annually, 1st quarter Chloride mg/l , meq/1 annually, 1st quarter Sulfate mg/1 , meq/1 annually, 1st quarter Nitrate mg/1 , meq/1 annually, 1st quarter Arsenic 0.001 mg/l quarterly Chromium (total ) 0.005 mg/l quarterly Iron 0.05 mg/l annually, 1st quarter Lead 0.005 mg/l quarterly Manganese 0.005 mg/l annually, 1st quarter Nickel 0.005 mg/l quarterly Vanadium 0.05 mg/l annually, 1st quarter Phthalates' µg/l annually, 1st quarter A. The practical quantitation limit of the analytical method should be discussed if it differs significantly from the MDL. Higher detection Limits may be used when the constituent concentration warrants it. B. EPA method 606. 4. Results of any other analyses performed, but not requested herein shall be reported along with the requested information. 5. A QA/QC Program shall be provided, which includes field blanks, blind duplicate samples, and lab spiked samples for each sampling event.