ARCHIVED REPORTS_XR0007901 - Laserfiche WebLink

Home Browse Search

Corrective Action Plan Montgomery Ward Auto Service Center, Stockton, CA The air sparging unit will be located inside the treatment compound set up at the site (see I Figure 13) The system will be connected to the 2-inch PVC header line that will lead from the treatment compound to all the wells that can be potentially used as an air sparging well Individual well head connections for air sparging will be similar to the well head connection in well VEW-1B Figure 15 shows final construction detail of VEW-1B as an air sparging well A 64 foot long, 1-inch PVC pipe assembly was constructed with a packer at the bottom and blank casing above the packer A 318 inch tubing was inserted through the 1-inch pipe such that the tubing extended from the top of the blank casing to 1 foot below the packer The complete 1-inch assembly was inserted inside the 2-mch casing of VEW-1B such that the packer was located at 64 ft bgs Oust above the lowest screened interval) and the 3/8" tubing extended 1 foot below the packer At ground level, the 318" tubing was connected to the air sparging unit I84 System Startup I Vapor Extraction and Treatment System The oxidizer will be initially heated without turning on the extraction blower The system will be allowed to heat to its required operating temperature Once the oxidizer is heated to the required temperature, the extraction blower will be activated and allowed to pull in ambient air, without any connection to the vapor extraction wells The system will be allowed to run in this mode for a minimum of one-half hour Following this period, operating parameters such as air flow, combustion chamber temperature, inlet and exhaust concentration, electrical and gas usage, will be noted If all parameters are within the expected ranges, the system will be connected to the main manifold leading to the extraction wells If possible each well will be individually connected to the extraction system and the system will be operated with an active extraction well for a minimum of one hour During this time, the following measurements will be made at 15-minute intervals ■ Flow rate from each active extraction well ■ Vacuum reading at each active extraction well ■ Vacuum readings at surrounding probes and passive wells that are within 100 feet of the active extraction well a Vapor concentration (by PID) at the active extraction well I ■ Vacuum measurement at the vapor extraction system unit ■ Vapor concentration at the inlet to and exhaust from the vapor extraction system ■ Temperature inside combustion chamber o Vapor concentration (PID) at exhaust or stack One vapor sample will also be collected from each well for laboratory analysis If the vapor extraction system unit cannot operate with only one well on line at a time, a dilution ' valve will be used to allow enough ambient air to be drawn in to allow the unit to operate . 1 bo - a_ re ll be a.� A fnr all the i svtra-ting wells On site A field ills d11V VC �J1of GUU1G witi. v� r. p..+[1t.. .v. ' determination will then be made to select the wells that will be used as active extraction wells The main objective of this selection will be to optimize the system and maximize Protect No 1232 - 26 - ' SAB WORD 1232CAP