WORK PLANS - Laserfiche WebLink

Home Browse Search

27 March 2000 AGE-NC Project No. 98-0450 Page 10 of 19 portable to allow for relocation on the site as necessary for site improvements. The SVE system Will consist of the SVE unit. a subsurface network of piping and five SVE. wells, two existing SVE wells (VW-1 and VW-2), three existing ground water monitoring wells (BMW-i. BMW-4 and BMW-5). The proposed SVI= well locations are depicted in Figure 5. A cross section of the site with well screen locations is depicted in Figure 7. The SVE will be connected through a pipe manifold to the vapor recovery wells and should he able to operate up to 200 cubic feet per minute (cfm). Soil vapor will be extracted from a confi�-ruation of extraction wells using a vacucrm blower and will be routed to the catalytic oxidizer. Supplemental energy (i.e. electricity) will be supplied to the heating coils of the SVE system to maintain an optimal temperature for a maximum destruction rate of hydrocarbon vapor. A typical destruction rate ofgreater than 95% of hydrocarbon vapors is expected throughout the entire cleanup duration. Specifications of the system is illustrated in Appendix A. An existing electrical meter for the site is located at the west corner of the maintenance building on- site. A dedicated electrical line will be installed by representative of AGE that will connect directly to the SVE unit. Furthermore. the meter will be used to monitor energy consumption. 4.5. SO11, VAPOR EXTRACTION SYSTEM START-UP PERIOD During the SVE start-up period (first week of'operation), influent and effluent vapor concentrations enterin�u, and exiting the SVE unit will be collected on a daily basis to ensure optimal destruction of recovered hydrocarbon vapor. Operational parameters (air flow°, combustion temperature, volume of processed vapor. oxygen level and the lower explosive limits (% LEI,) will be monitored daily during the start-up period. 4.6. MONITORING AND MAINTENANCE ACTIVITIES The VFS unit will be monitored weekly for organic vapor (OV) using a photo-ionization detector (PID) to ensure optimal destruction of' recovered hydrocarbon vapor. and to monitor cleanup progress; initially, OV measurements will be collected on a more frequent basis until the system has stabilized. PID measurements will be recorded from the influent and effluent vapor streams of the VES unit. Vapor samples from the SVE influent and the effluent streams will be collected in Tedlar bags on a monthly basis and submitted to a State of California Department of Health Services (DHS)- �rhauu•cd GeoE{mirnnmcnhEl,Enr.