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• Water Contaminant Removed from Excavation Pit 1993 <br /> C = 3,225 gal x 0 000014 ppm = 0 045 gallons TPHG <br /> C = 3,225 gal x 0 000000020 = 0 000064 gallons Benzene <br /> MTBE was not analyzed for that data set. <br /> Water Estimated Contaminant Mass Remaining <br /> Water(capillary/aquife March, 2000 data estimated in the vicinity of B-1, B-2 and B-3, <br /> area about 20' x 20' x 15' thick <br /> Area 6,000 ft3 x ave , soil density 1001b/ft x 0 3 porosity x 0 0010152 ppm = 182 7 lb <br /> 182 7 lb — 6 8 = 26 8 gallons TPHG <br /> Benzene was not detected in that data set. <br /> MTBE was not detected in that data set. <br /> These recalculated estimates show that higher quantities of contaminants were removed, <br /> and higher quantities of contaminants remain using the highest observed TPHG values <br /> The calculations for water show that higher quantities of dissolved TPHG contaminants <br /> remain in capillary and aquifer water Wright regrets the calculation and volume errors and <br /> • the reviewing agencies should substitute these recalculated numbers in our Request for Site <br /> Closure Report dated May 9, 2001 <br /> If you have any questions, please call _ <br /> D U <br /> Sincerely, <br /> Wright Environmental Services, Inc �o4t�ER <br /> t �iGLL r� Tii F.E9 <br /> ohn Lynch Christopher M Palmer <br /> C�;:i.LC�SF <br /> Principal CEG 1262 ;A . <br /> cc Ms Margaret Lagono, San Joaquin Public Health <br /> Mr Marty Hartziie, RWQCB <br /> Page 2 <br />