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STANDARD OBSERVATIONS Site inspections were performed monthly this semester(Appendix H). An electronic signature on the form certifies that all observations were performed and are accurate. RUN-OFF/RUN-ON FACILITIES The NCRCSL utilizes several facilities to control run-on and run-off. A perimeter berm around the waste management unit prevents any run-on to the unit. This perimeter berm, along with a series of ditches, also controls all surface run-off during storm events, and directs surface run-off from the landfill to a retention basin on the east side of the site (Figure 3). The primary path for water entering the site is from a tributary of South Paddy Creek east of the site. Water entering from this source is diverted into the wetlands on the north end of the site and around the unit(Figure 3). During the past semester, there were no breeches in any of the run-on/run-off facilities, and they will continue to be monitored in the future. LEACHATE COLLECTION AND RECOVERY SYSTEM Modules 1 and 3 Facilities The leachate collection and recovery system consists of: ® Sump with dedicated pump for Module 1 ■ Sump with dedicated pump for Module 3 ■ Volumetric flow meter for each leachate sump pump, indicating total gallons pumped ■ A 3,000 gallon leachate storage tank at the southwest corner of Module 1 n Discharge pump located on the storage tank Operation Leachate is pumped from leachate sumps to the storage tank by manually activating the pumps. Only one pump can be operated at a time because the control panel switch allows the selection of one pump circuit or the other. Pumping automatically stops when sump is "dry", as indicated by a sensor on the pump. Leachate sump pumps are operated at least two days per week, on North County RCSL 10 Public Works/Solid Waste 1 st Semester 2006 Groundwater Monitoring County of San Joaquin-July 31,2006