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MONITORING AND REPORTING PROGRAM NO. R5-2010-0016 -5- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS NORTH COUNTY LANDFILL SAN JOAQUIN COUNTY <br /> <br /> <br /> <br />2) Nonstatistical CLs Interim CLs for the remaining 13 dissolved metals (i.e., those not detected in any of the 9 monitoring events) and CLs for VOCs and other organic COCs were set equal to the PQL. <br />c. Surface Water CLs for statistical COCs shall be based on either of the following: <br />1) Concurrent upstream monitoring data; and/or 2) Statistical analysis of historical upstream monitoring data (assumed for interim CLs under this Order). <br />Interim statistical CLs based on available monitoring data from sampling point S-1 are provided in Table G.1. Revised CLs for these dissolved metals shall be developed once additional background monitoring has been conducted for these constituents under Section G.2 herein. <br />3. Monitoring Points (Section 20405) The monitoring points for unsaturated zone, groundwater, and surface water monitoring shall be as specified in Sections E.2; F.2 and 3; and G.2, respectively. <br />4. Compliance Points <br />a. Unsaturated Zone <br />The compliance points for the unsaturated zone shall consist of all existing and future lysimeters installed along the landfill perimeter, as referenced in Section E.2 herein. <br />b. Groundwater The compliance points for groundwater monitoring shall consist of all groundwater monitoring wells installed along the landfill perimeter, as referenced in Section F.3 herein and described as follows: <br />1) Point of Compliance Wells Section 20405 defines the Point of Compliance (POC) as a vertical surface located at the hydraulically downgradient limit of the Unit that extends through the uppermost aquifer underlying the Unit. <br />The groundwater monitoring wells along the POC shall consist of all downgradient (and cross gradient) landfill perimeter wells, including Gs-2, 3D, 4, 5 and 6; <br />2) Upgradient Wells All upgradient perimeter wells within the zone of influence of LFG (e.g., G-1); <br />3) Future Wells Any future wells that meet either (or both) of the criteria in 4a and 4b.