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Mr Chuck Carmel <br /> July 8, 1993 <br /> Page 2 <br /> W = QxCx (120x 10-5) <br /> where <br /> W = Average amount of chemical discharged, lbs/day <br /> Q = Average flow rate, -pm <br /> C = Concentration, pg/l <br /> 1 20 x 10-5 = (minutes/day x lbs/gallon)/1,000,000,000** <br /> Thus, <br /> W = 288x10-5xCforQ = 24gpm <br /> **Use 1,000,000 for determination of average lbs/day of TPH <br /> The next monthly status letter will include the interval April 16, 1993, through May 15, 1993 <br /> Please call Mr Steve Misner at (916) 444-0123 if you have any questions regarding the <br /> groundwater extraction system at ARCO Station 2133 <br /> Sincerely, <br /> BROWN AND CALDWELL <br /> i <br /> _,,o ren D, er Lence E Phillips <br /> ct Managerg#li�2 Cahfonva Registered Geo gist #3710 <br /> S DM:LEP:jrb <br /> Enclosure <br /> cc. Ms. Mary Meays, San Joaquin County <br /> Ms. Elizabeth Thayer, Regional Water Quality Control Board <br /> Mr Frank Tucker, City of Stockton <br /> Ms. Mindy Wright, Brown and Caldwell <br /> This report was prepared in accordance with the standards of the environmental consulting industry at the time u was <br />• prepared It should not be relied upon by parties other than those for whom it was prepared,and then only to the extent <br /> of the scope of work which was authorized This report does not guarantee that any additional environmental condinons <br /> beyond that described in this report exist at this site <br /> Brawn and Caldwell <br /> Consultants 7452%0ORRESPOM-0af5 <br />