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Table 1 Air Sparge System Operational Data Chevron Service Station#9-4275 2905 West Benjamin Holt Drive,Stockton California Total System Data GM-1 GM-2 i GM-3 GM-4 GM 5 Hour Avg Meter Injection Flow Injection Flow Injection Flow Injection Flow Injection Flow Injection Flow Date Reading Pressure Rate Status Pressure Rate Status Pressure Rate Status Pressure Rate Status Pressure Rate Status Pressure Rate Checked (hours) (psi) (scfm) (OIC) (psi) (scfm) (O1C) (psi) (scfm) (O/C) (psi) (scfm) (OIC) (psi) (scfm) (01C) (psi) (scfm) 01/07102 32 763 9 — 0 86 O 87 — 0 9 — O 83 — 0 87 — 01/15/02 32 960 9 156 0 91 O 9 0 88 — 0 84 — 0 91 -- 02/07/02 33 510 9 5 156 O 95 0 96 — O 94 — 0 92 -- 0 9 — 03/05/02 34,133 95 -- 0 9 1 — 0 92 0 93 -- O 9 -- 0 91 — 04/11/02 34,249 -------------------------------SYSTEM DOWN---------- - — 05/10/02 34 249 d - —___— —____—___ — —_---Reinstalled AIS Compressor-- — --- - — — — 05/13/02 34,850 95 — 0 I 94 I — I 0 9 3 1 — I 0 1 93 I — I 0 I 95 I — I 0 93 -- 06/07/02 34,850 ----— — — ----——SYS"I'EM DOWN BLOWER DOWN— ---- -- --- 0b/19/02 34 850 a 95 221 0 94 — 0 95 - 0 95 - O 94 — O 95 — 07/01/02 35 141 95 22 1 0 95 0 94 0 94 — 0 95 O 92 — 07/18/02 35548 — 1561 0 94 — O 95 — O 94 — O 93 — 0 94 — 08/01/02 35,885 — 246 0 94 — 0 95 0 93 — 0 92 — 0 94 - 09/03/02 36 506 - 241 0 94 O 9 3 0 9 3 — 0 95 — 0 92 — REPORTING PERIOD 6/19/02 to 9!3102 PERIOD AVG INJECTION PRESSURE 9.5 PERIOD AVG FLOW RATE 217 PERIOD PERCENT OPERATIONAL 91% Explanations Notes PSI =Pounds per square inch a =Motor on sparge blower burned out Motor was replaced 811498 scfm =Standard cubic feet per minute b =Air compressor rebuilt and replaced and system restarted =Not available c =Motor on sparge blower burned out Motor was replaced 8/17/01 C =Calculated number d =Motor on sparge blower burned out Motor was rebuilt and replaced 5/10/02 OIC =Open/Closed e =Motor on sparge blower burned out Motor was replaced 6119102 I Chevron/94275/Penodic Momtonng/2001 O&M/9-4275 O&M Data xls Page 3 of 3 I