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T <br /> Mr Chuck Carmel <br /> August 12, 1992 <br /> Page 2 <br /> W = Q x C x 1 20 x 10-5 <br /> where. <br /> Q = Average flow rate, gpm <br /> C = Concentration, µg/1 <br /> W = Average amount of chemical discharged, lbs/day <br /> 1 20 x 10-5 = (minutes/day x lbs/gallon)/1,000,000,000** <br /> W = 9 6 x 10-6 x C for Q = 0 8 gpm <br /> **Use 1,000,000 for determination of average lbs/day of TPH <br /> The next monthly status letter will include the interval June 16 through July 15, 1992 <br /> Please call me at (916) 444-0123 if you have any questions regarding the groundwater <br /> extraction system at ARCO Station 2133 <br /> Sincerely, GS �fl GEpr0 <br /> BROWN AND CALDWELL CONSULTANTS <br /> Steven D Misner 7a Lucas Y�aF CPok� <br /> Project Manager California Registered Geologist #4301 <br /> SDM.JL.mkw <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 /> Mr. Chns Winsor, ARCO Products Company <br /> •1 <br /> Brown and Caldwell <br /> Consultants 1`2 <br />