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MONITORING AND REPORTING PROGRAM NO. R5-2010-0016 -8- <br />SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS <br />NORTH COUNTY LANDFILL <br />SAN JOAQUIN COUNTY 0 <br />a. Monitoring Points <br />Lysimeter <br />Type <br />Location <br />VZ -1 <br />Background <br />Undeveloped area near G-1 <br />VZ -2 <br />Detection <br />SW perimeter Module 1, <br />NW perimeter Module 3 <br />VZ -3 <br />Detection <br />NW perimeter Module 1 <br />VZ -4 <br />Detection <br />Northern perimeter, Module 1 <br />VZ -6, 7 <br />, Detection <br />Under Module 4 (western half) <br />VZ- 8 <br />Detection <br />Under Module 4 (eastern half) <br />1. Lysimeters installed in shallow soil beneath lined excavation slopes <br />Lysimeter monitoring locations shall also include future lysimeters installed to <br />monitor future expansion modules per WDR Construction Specification D.S.c. <br />Pore liquid monitoring shall also include any lysimeters or other monitoring <br />devices beneath leachate collection sumps. <br />b. Monitoring Parameters & Schedule <br />The pore liquid monitoring shall be conducted monthly. Any liquid recovered <br />shall be analyzed in accordance with the parameters in Section F.3.c, except <br />that volume of liquid recovered shall be recorded in lieu of elevation. In the <br />event that a release is tentatively indicated, the Discharger shall proceed with <br />confirmation sampling under WDR Monitoring Specification E.27, and follow <br />the Response to Release requirements of the WDRs and SPRR, as indicated. <br />The Discharger shall also consider whether the detection of liquid in the <br />lysimeter constitutes significant physical evidence of a release under WDR <br />Monitoring Specification E.30. <br />Elevation Monitoring (Section 20415(e)(13)) <br />The groundwater surface elevation (in feet and hundredths, MSL) in all wells and <br />piezometers shall be measured on a quarterly basis. Groundwater elevations <br />taken prior to purging the well and sampling for Monitoring Parameters may be <br />used to fulfill this requirement. Groundwater elevations for all monitoring wells for <br />a given groundwater body shall be measured within a period of time short enough <br />to avoid temporal variations in groundwater flow which could preclude accurate <br />determination of groundwater gradient and direction. The results of groundwater <br />elevation monitoring shall be displayed on a water table contour map and/or <br />groundwater flow net for the site and included in each monitoring report. The <br />Discharger shall use the groundwater elevation monitoring data to estimate the <br />following, as feasible: <br />