Laserfiche WebLink
MONITORING AND REPORTING PROGRAM NO. R5-2010-0016 -8- SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS NORTH COUNTY LANDFILL SAN JOAQUIN COUNTY <br /> <br /> <br /> <br />a. Monitoring Points <br />Lysimeter Type Location VZ-1 Background Undeveloped area near G-1 <br />VZ-2 Detection SW perimeter Module 1, NW perimeter Module 3 VZ-3 Detection NW perimeter Module 1 VZ-4 Detection Northern perimeter, Module 1 VZ-6, 7 Detection Under Module 4 (western half) VZ- 8 Detection Under Module 4 (eastern half) __________________________________ 1. Lysimeters installed in shallow soil beneath lined excavation slopes. Lysimeter monitoring locations shall also include future lysimeters installed to monitor future expansion modules per WDR Construction Specification D.5.c. Pore liquid monitoring shall also include any lysimeters or other monitoring devices beneath leachate collection sumps. b. Monitoring Parameters & Schedule <br />The pore liquid monitoring shall be conducted monthly. Any liquid recovered shall be analyzed in accordance with the parameters in Section F.3.c, except that volume of liquid recovered shall be recorded in lieu of elevation. In the event that a release is tentatively indicated, the Discharger shall proceed with confirmation sampling under WDR Monitoring Specification E.27, and follow the Response to Release requirements of the WDRs and SPRR, as indicated. The Discharger shall also consider whether the detection of liquid in the lysimeter constitutes significant physical evidence of a release under WDR Monitoring Specification E.30. <br />F. GROUNDWATER MONITORING <br />1. Elevation Monitoring (Section 20415(e)(13)) <br />The groundwater surface elevation (in feet and hundredths, MSL) in all wells and piezometers shall be measured on a quarterly basis. Groundwater elevations taken prior to purging the well and sampling for Monitoring Parameters may be used to fulfill this requirement. Groundwater elevations for all monitoring wells for a given groundwater body shall be measured within a period of time short enough to avoid temporal variations in groundwater flow which could preclude accurate determination of groundwater gradient and direction. The results of groundwater elevation monitoring shall be displayed on a water table contour map and/or groundwater flow net for the site and included in each monitoring report. The Discharger shall use the groundwater elevation monitoring data to estimate the following, as feasible: