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[ sciencemor w r V AN 0 g <br /> rZ <br /> • -" C InCCrs l <br /> 1,_,,I %L H <br /> PF-R IVi 1I/SERVICES <br /> January 7, 2002 <br /> Ms Mtnny Thurman <br /> 8238 Thornton Road <br /> Stockton, CA 95209 <br /> SUBJECT INSTALLATION OF A DOMESTIC WELLHEAD <br /> TREATMENT SYSTEM, THURMAN PROPERTY <br /> 17904 AIRPORT WAY, MANTECA, CA <br /> 1n. reference to. <br /> Frank's One Stop <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> INTRODUCTION <br /> On October 23, 2001, the San Joaquin County Public Health Services <br /> Environmental Health Division (PHS/EHD) sent you a letter stating that a <br /> domestic wellhead treatment system would be installed on your <br /> property's well, by Aqua Science Engineers (ASE), as a more permanent <br /> solution to pioviding MTBE-free watei to the house's plumbing system A <br /> cop\ of this letter is included as Appendix A <br /> WELLHEAD TREAIMENT-SYSIEM DESIGN AND INSIALLATION <br /> On December 11 and 12, 2001 , ASE installed a wellhead treatment system <br /> on the well located at 17904 Airport Way to remediate low MTBE <br /> concentrations previously identified in that well This well supplies water <br /> to tenants at the property <br /> The wellhead treatment system consists of the existing well pump and <br /> holding tank, which is then plumbed to two 250 pound activated carbon <br /> canisters piped in series Untreated water is removed from the well a n d <br /> stored in the existing holding tank Untreated water leaves the holding <br /> tank and enters the carbon canisters prior to enteiing the plumbing <br /> system toi the iesidences on the property Each of the carbon canisters is <br /> filled with 250 pounds of virgin 1200 mesh activated carbon The <br /> activated carbon is used as a media for the MTBE molecules to ad s o i b <br /> onto Water leaving the canisters is then free of MTBE At the point i n <br /> time when the activated carbon can no longer adsorb the MTBE molecules, <br /> - i - <br /> 208 W E! Pin,c,do Donville Cohfofnlc, 94526 925 82(}9391 • Fox 925 8374853 <br />