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Table 1 Groundwater Oxygenation System Former Shell Service Station WIC 9204 7524 1509 141 N EI Dorado Stockton Operating Data Measurement System MW 1 MW 2 MW 3 MW 4 MW-5 RW 1 RW 2 Date Time Operation Flow DO Flow DO Flow DO Flow DO DO Flow DO Flow DO Sampled Comments Hours (acfh) (ppm? (acth) (ppm) (acfh) (ppm) (acfh) (ppm) {ppm) (acfh) (ppml (ac(h) (ppm) By 11/16/94 11 30 AM 12 AM to #NIA 5 &1-90 IA 5 5 #NIA 5 4 #N1A 0 3 2 6 #NIA *5 8 #NIA '5 6 Fugro 12 PM 11 29-94 to 1 6-95 System down due to electrical problerns 116/95 2 30 PM 12 AM to 3 0 #NIA 3 0 #NIA 3 0 #N/A 0 0 #NIA #NIA 3 0 #N/A 3 0 #NIA Fugro Restart GO System 12 PM ° 1/13195 200 PM 12 AM to 30 54 30 55 30 52 00 10 19 30 *53 30 *51 Fugro 12 PM 1120/95 830 AM 12 AM to 10 83 1 5 13 17 42 00 04 28 05 *85 00 *65 Fugro 12 PM 1130/95 215 PM 12 AM to 00 79 00 10 00 44 00 02 24 00 *87 00 '63 Fugro 12 PM 2/7195 3 00 PM 24 Hours 3 0 7 3 3 0 1 4 3 0 3 9 0 0 #N/A 2 9 0 5 #NIA 0 5 *7 fl Fugro 5/24/95 24 Hours 0 0 **3 8P 00 *43 6F 00 **3 4F 00 **3 6 **3 OF 0 0 '*3 OP 00 43 8 Blaine Tech RW-2 pumping Sod vent, /3 2A /3 OA /3 OA /3 6A /2 4A and GO system shut down 5/22195 for pulsing I 8131195 0 0 **3 2 00 **3 4 00 "2 8 00 **3 2 #NIA 0 0 **3 6 00 *3 6 Blaine Tech Sod vent and GO systems /3 2A /2 6A /2 8A /3 4A shut down on 8117185 Pumping from RW 2 1015195 24 Hours #NIA *5 4A #NIA *5 2A #NIA *5 7A #N1A "5 8A *2 8A #NIA *3 OA #N/A *2 6 Blaine Tech Shutt on n pumping from Activated diffuser in MW 4 on 10/3195 Soil vent and GO systems In operation Notes Diffusers activated in wells MW-1, MW 2, MW 3, RW 1, RW 2, MW 4 GO Groundwater Oxygenation DO Dissolved Oxygen acfh Actual cubic feet per hour ppm Parts per million #N/A Data not collected DO readings taken down well in all wells except where indicated by ` or *" ■ Measurements taken from sample port ** Measurements taken above ground System operating on a programable timer A After purging P Prior to purging Page 2