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MONITORING AND REPORTING PROGRAM ORDER NO.R5-2009-0049 -4- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS HARNEY LANE LANDFILL SAN JOAQUIN COUNTY 3. Monitoring Points (Section 20405) The monitoring points for groundwater monitoring shall be as identified in Sections E.2.a and E.3.a herein. 4. Point of Compliance (Section 20405) Title 27 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. The POC wells shall consist of the following: a. All downgradient (and cross gradient) landfill perimeter wells, including MWs- 2, 3, and 4; b. All upgradient perimeter wells within the zone of influence of LFG (i.e., MW-1); c. Any future wells that meet either (or both) of the criteria in 4a and 4b. 5. Compliance Period (Section 20410) The compliance period (the minimum period for a landfill during which the Discharger shall conduct a water quality monitoring program subsequent to a release from the Unit) is equal to the active life of the Unit plus the closure period. The compliance period shall be as follows: a. Since the landfill operated from 1948 through 1991 and was closed in 1994, the compliance period is 56 (53 + 3) years. b. If the landfill is in corrective action at the scheduled end of the compliance period, the compliance period shall be extended until the discharger can demonstrate that the Unit has been in continuous compliance with its WQPS for a period of at least three consecutive years, including proof period under Section 20430(f). See Monitoring Specification E.26 of the WDRs. D. UNSATURATED ZONE MONITORING The Discharger shall conduct LFG monitoring, as necessary to assess the effectiveness of LFG extraction in mitigating LFG constituents (i.e., VOCs, carbon dioxide) as a potential source of groundwater impacts and the need for additional LFG controls or other corrective action measures. 1. Monitoring Points LFG monitoring shall, at a minimum, be conducted at the following locations: