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• MONITORING AND REPORTING PROGRAM -6- CLOSURE AND POST CLOSURE MAINTENANCE JOHNS-MANVILLE MANUFACTURING COMPANY, INC. SURFACE IMPOUNDMENTS AND UNCLASSIFIED LANDFILLS SAN JOAQUIN COUNTY WATER QUALITY PROTECTION STANDARD The Water Quality Protection Standard (Standard) shall consist of constituents of concern, concentration limits, monitoring points, and points of compliance as follows: CONSTITUENTS OF CONCERN The Constituents of Concern shall be for water-bearing media (i.e., ground water and surface water.) CONCENTRATION LIMITS For each monitoring point or location assigned to the detection monitoring program, the Concentration Limit for each Constituent of Concern (or Monitoring Parameter) shall be its background value as obtained during the appropriate Reporting Period, as follows: 1) If 10% or more of the samples taken during a given Reporting Period from the background monitoring points for a monitored medium exceed their respective facility-specific Method Detection Limit [MDL]" for a given constituent, then the Concentration Limit for that medium and constituent shall consist of the mean (or median, as appropriate) and standard deviation (or other measure of central tendency, as appropriate) of all the background data obtained for that constituent from that medium during that Reporting Period; otherwise 2) the Concentration Limit for that medium and constituent shall be its MDL. MONITORING POINTS Monitoring Points (including background) for detection monitoring shall be those listed in this Monitoring and Reporting Program and shown on Attachment B. Surface Nater: SW-1, SW-2, SW-3, and SW-4 Ground Nater: MW-1, MW-2, MW-3, and MW-4 POINTS OF COMPLIANCE The Points of Compliance shall be those listed in this Monitoring and Reporting Program and shown on Attachment B. Surface Water: SW-2, SW-3, and SW-4 Ground `Vater: MW-2, MW-3, and MW-4