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• first and second canister Each carbon canister has been fitted with a sample port which allows a sample to be collected and analyzed at prescribed intervals to determine at what point 1 ,2-DCA has broken through the first canister ASE will replace the canisters when they no longer are effective at removing the 1,2-DCA from the water The system has been designed to always have an adequate Supply of activated carbon in one vessel to treat a normal volume of water while the other canister is spent and in the process of being replaced Currently the schedule f o r sample collection and analysis is quarterly (every 3 months) WATER SAMPLE COLLECTION, ANALYSIS AND RESULTS On Febivary 27 2002 a water sample labeled 495-INF-02-27-02 was collected directly from the well as a scheduled quarterly sample collection activity The sample was placed within an ice chest containing wet ice while transported to Kiff Analytical of Davis, Califoi nia (ELAP# 2 2 3 6) under chain of custody procedures The sample was analyzed for total petroleum hydrocarbons as gasoline (TPH-G), benzene, toluene, ethylbenzene and xylenes (collectively known as BTEX), the five fuel oxygenates, and lead scavengers by EPA Method 8260B The sample • contained no detectable concentrations of any of t h e compounds analyzed. This is the first time the well has resulted in non-detectable concentrations for the compounds analyzed Historically, the well water has contained an average of approximately 068 pai is p e i billion 1 ,2-DCA After the system was installed, started, and operating in late February, 2002, ASE collected a water sample after treatment by the first carbon canister This sample was labeled 495-GAC-02-27-02 The sample was placed within an ice chest containing wet ice while transpoi ted to Kiff under chain of custody procedures The sample was analyzed foi TPH-G, BTEX, five fuel oxygenates, and lead scavengers by EPA Method 8260B The sample contained no detectable concentrations of any o f the compounds analyzed A copy of the ceitified analytical i epos is are attached in Appendix B REMOVAL OF ALTERNAITYE WATER SUPPLY The Aeropure Water alternative watei supply was disconnected from the plumbing system after the system's performance was evaluated and found to be operating as designed - 2-