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MONITORING AND REPORTING PROGRAM -3- <br /> CLOSURE AND POST CLOSURE MAINTENANCE - <br /> JOHNS-MANVILLE MANUFACTURING COMPANY, INC. <br /> SURFACE IMPOUNDMENTS AND UNCLASSIFIED LANDFILLS <br /> SAN JOAQUIN COUNTY <br /> TABLE I <br /> GROUND WATER MONITORING PARAMETERS / FREQUENCY <br /> Parameter Units Frequency <br /> Field Parameters <br /> Temperature °C Semi-annually' <br /> Ground Water Elevation Feet and hundredths, M.S.L. Semi-annually' <br /> Specific Conductance µmhos/cm Semi-annually' <br /> pH pH units Semi-annually' <br /> Turbidity Turbidity units Semi-annually' <br /> Monitoring Parameters <br /> Total Dissolved Solids (TDS) mg/L Semi-annually' <br /> Total Organic Carbon mg/L Semi-annually' <br /> Volatile Organic Compounds µg/L Semi-annually' <br /> (EPA Methods 601 and 602) <br /> Constituents of Concern <br /> Volatile Organic Compounds µg/L 5-years <br /> (EPA Method 624) <br /> ICP Metals (26 metals) mg/L 5-years <br /> (EPA Method 6010 and 7000 series) <br /> Asbestos Fiber Content for fibers/1 5-years <br /> fibers > 10 microns <br /> 1- To be monitored quarterly for the first year and semi-annually thereafter. <br /> Report all peaks discovered by the EPA test methods. Metals shall be analyzed and reported as <br /> totals (except for chromium). Selenium, arsenic, and mercury analyses shall be done by atomic <br /> absorption (AA). <br />