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a ua science 0 <br /> 1 <br /> morq _ <br /> engineers inr JAN 0 8 2002 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> January 4 2002 <br /> Ms Zoe Haworth <br /> 24550 S Brown Road <br /> Manteca, CA 95337 <br /> SUBJECT INSTALLATION OF A DOMESTIC WELLHEAD <br /> TREATMENT SYSTEM, HAWORTH RESIDENCE <br /> 17950 AIRPORT WAY, MANTECA, CA <br /> In reference to <br /> Frank's One Stop <br /> 2072 West Yosemite Avenue <br /> Manteca, California <br /> INTRODUCTIO <br /> The San Joaquin County Public Health Services Eng ironmental Health <br /> Division (PHS/EHD) directed the responsible party of Frank's One Stop, <br /> our client to install a wellhead treatment system on an MTBE-impacted <br /> well located on Airport Way in their letter dated March 28, 2001 Aqua <br /> Science Engineeis (ASE) subsequently issued a lettet to the San Joaquin <br /> County PHS-EHD on April 6, 2001 that outlined an approach to install a <br /> treatment system at the well located at your property 17950 Airport Way <br /> That letter was subsequently signed/accepted by the San Joaquin County <br /> PHS-EHD See Appendix A for copies of the afore-mentioned letters <br /> WELLHEAD TREATMENT SYSTEM DESIGN AND INSIAi I ATION <br /> Between Octobei 22 and 29, 2001, ASE installed a « ellhead treatment <br /> system on the well located at 17950 Airport Way to remediate low <br /> concentrations of MTBE previously identified in that well by ASE This well <br /> supplies A atei to tenants at the pi operty <br /> The wellhead treatment system consists of the existing well pump a n d <br /> holding tank, which is then plumbed to a residential air-stripper followed <br /> by two 250 pound activated carbon canisters piped in series, see Figure 1 <br /> Untreated water is removed from the well, and Stored in the existing 70 <br /> gallon holding tank Untreated water leaves the holding tank and enters <br /> the air-stripper which is capable of aerating up to ten gallons of water p e r <br /> minute (gpm) The aerated water is then pushed through each of the <br /> - i - <br /> 20c VV El Rnfado Danville, California 94520 0 925 82&9391 • F 925 837-4853 <br />