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ARCADIS GERAGHTY&MILLER <br /> Table 2: Air Sparging System Operational Parameters <br /> Chevron Service Station #9-4275 <br /> 2905 West Benjamin Holt Drive <br /> Stockton, California <br /> Date System System System <br /> of Run-Timer Flow Rate Injection <br /> Site Visit (hours) Rate (cfm) Pressure (psi) <br /> 4-Apr-97 453 15 13 <br /> 16-May-97 1,143 14 9 <br /> 8-Jul-97 2,361 11 10 <br /> 26-Sep-97 3,352 14 10 <br /> 14-Oct-97 3,782 10 9 <br /> 24-Oct-97 4,022 10 8 <br /> 13-Nov-97 4,506 10 9 <br /> 5-Dec-97 5,027 NM NM <br /> 23-Dec-97 5,465 9 9 <br /> �. 22-Jan-98 5,625 NM 10 <br /> 8-Feb-98 5,981 9 10 <br /> 13-Mar-98 NM 13 13 <br /> 3-Apr-98 7,327 13 12 <br /> Total hours of operation = 6,874 <br /> NM- Not measured <br /> Project No RC000309 0010 CHEV N ZWBENIAM TABLESUPARCTHLXL5 <br />