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Table 7 Dual Phase Extraction System-Operating Data Parcel 2A-L&M OU 666 West Weber Avenue,Stockton,CA Period Influent Effluent Hourmeter Totalizer System Volume Average FIN Well Field Operating System ■ Flow VOC VOC VOC1 Reading Reading Flow Discharged Flow Rate Rate Temperature Temperature Vacuum Rate [FID] [FID] Removed Date hours al al al al/da m °F °F inH scfm my my Ib/da H12 Notes Notes continue : 7=Source test for air board. System shut down following source test due to on-site excavation activities. 8=Samples collected from wastewater treatment system.Carbon change-out needed. 9=System shut down following completion of vapor PAH sample collection. 10=System non-operational since 5/2005.No sampling and no discharge activities occurred. 11 =System effluent sampled on 7/6/2005 following startup. 12=Start-up on fresh GAC 13=pH measurement recorded in the field beginning December 9,2009. 14=Hourmeter and totalizer readings recorded on Feb 4,2010,all else occurred on Feb 5,2010. 15=System shutdown on August 28,2010 due to the failure of the oil-water separator transfer pump. Repairs were made and the system was restarted on October 4,2010. 16=System hour meter was replaced. DPE wells were closed during pilot test conducted from 11/16/10 to 11/19/10. Nowell field temperature or flow rate were collected;therefore,values from the most recent visit with the same system vacuum was used instead(07/12/10). 17=System shut down with regulatory approval for remainder of 4Q11 due to declining influent concentrations. Will be restarted following rebound testing. 18=System restarted 19=System measurements not collected on this date. 20=System measurements taken post blower on and after this date.System Vacuum now System Pressure in units of'in H 20' I:\Tidewater\TW Stockton(P2A)\Engineering\O&M\Tables\O&M Tables 2012\4Q12\Parcel 2A OM Tables 4Q12.xlsx Page 4 of 4