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• second canister Each carbon canister has been fitted with a sample port <br /> which allows a Sample to be collected and analyzed at prescribed intervals <br /> to determine at what point MTBE has broken through the first canister <br /> ASE will replace the canisters when they no longer are effective at <br /> removing the MTBE from the water The system has been designed to <br /> always have an adequate supply of activated carbon in one vessel to treat <br /> a normal volume of water while the other canister is spent and in the <br /> process of being replaced Currently, the schedule for sample collection <br /> and analysis is quarterly (every 3 months) <br /> WATER SAMPLE COLLECTION AND ANALYSTS <br /> On Octobei 30, 2001, a water sample, labeled 17911 Aiipoit Wad was <br /> collected from the well during routine quarterly sample collection <br /> activities The sample was placed within an ice chest containing wet ice <br /> while transported to Kiff Analytical of Davis, California (ELAP# 2 2 3 6) <br /> under chain of custody procedures The sample was analyzed for total <br /> petroleum hydrocarbons as gasoline (TPH-G), benzene, toluene, <br /> ethylbenzene, and xylenes (collectively known as BTEX), the five fuel <br /> oxygenates, and lead scavengers by EPA Method 8260B The sample <br /> contained 1 1 parts per million (ppb) MTBE <br /> • After the system was installed, started, and operating in mid-December, <br /> 2001, ASE collected a water sample after treatment by the first GAC <br /> canister This sample was labeled 17911-GAC1-12 13 01 The sample was <br /> placed within an ice chest containing wet ice while transported to Kiff <br /> under chain of custody procedures The sample was analyzed for TPH-G, <br /> BTEX, five fuel oxygenates, and lead scavengers by EPA Method 8260B <br /> The sample contained no detectable concentrations of any o f <br /> the compounds analyzed. A copy of the ceitified analytical reports <br /> are attached in Appendix B <br /> WATER SAMPLE ANAL�Y_TICAL RESULTS <br /> • The only compound identified to sample 17911 Airport Way (the pre- <br /> treated water sample) was MTBE at I 1 ppb <br /> • No compounds were identified in sample 1791 1-GAC 1-12 13 01 , which <br /> was collected after GAC canister number I This pi over that t h e <br /> treatment System is working as designed, and that no MTBE of any <br /> other compounds analyzed ale entering the house's plumbing system <br />