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• / APEX 11244 Pyrites Way- Gold River,CA 95670 <br /> E N y I R a T E ( H , INC Phone 916 8510174 - Fax 916 8510177- Toll Free 1 800 242 5249 <br /> November 29, 2005 <br /> Mr Michaellnfurna 2 2005 <br /> San Joaquin County Environmental Health Department ENVIR01VJ LENT 14EALTFI <br /> 304 East Weber Avenue, 3rd Floor PERIti1lT/SERV€CES <br /> Stockton, California 95202 <br /> Subject Monitoring Well MW-4A and MW-4B Sampling Results <br /> Flag City New West #1003 <br /> 6437 West Banner Street, Lodi, California 95242 <br /> Apex Project No NWPO1 004 <br /> Dear Mr Infurna <br /> Apex Envirotech, Inc (Apex) has been authorized by New West Stations (New West) to submit <br /> the weekly sampling results of offsite downgradient monitoring wells MW-4A and MW-4B <br /> (Figure) Groundwater samples were collected on November 17, 2005 and analyzed for the <br /> following , <br /> Analysis I Abbreviation Designation 11SBPA Method No <br /> Total Petroleum Hydrocarbons Gas Range <br /> as Gasoline TPHg Hydrocarbon 8015M <br /> Tertiary Butyl Alcohol TBA Fuel 8260B <br /> Methyl Tertia Bu!yl Ether MTBE Ox enates <br /> Results from the well samplings are included in the attached table The laboratory report and <br /> chain-of-custody form are included as an attachment <br /> Analytical results showed below detection limits for well MW-4A, which is typical for the well <br /> and well MW-4B had a detection of MTBE at a historical low <br /> Wells MW-4A and MW-4B have been sampled for one month, as requested by the San Joaquin <br /> County Environmental Health Department in a letter dated October 25, 2005 A declining <br /> concentration trend has been set and Apex recommends monthly sampling be discontinued <br />• <br />