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first and second canister Each carbon cani,,tei 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 pioce55 of being replaced Currently, the schedule foi sample collection and analysis is quarterly (every 3 months) WATER SAMPLE COLLECTION, ANALYSIS AND RESULTS On October 30, 2001, a water sample, labeled 17717 Airport Way, was collected from the well during routine quarterly sample collection activities The sample was placed within an ice chest containing wet ice while transported to Kiff Analytical of Davis, California (FLAP# 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 082 parts per billion (ppb) 1,2-DCA After the system was installed, started, and operating in mid-Decem P g bei, 2001, ASE collected a water sample after treatment by the first carbon canister This sample was labeled 17717-GAC1-12 14 01 The sample was placed within an ice chest containing wet ice while transported to Kiff under chain of custody procedures The sample was analyzed for TPH-G, BTEX, five fuel oxygenates, and lead scavengers by EPA Method 8260B The sample contained no detectable concentrations of 1,2-DCA The sample did however contain very low concentrations of compounds in the gasoline range (79 ppb) that are common components in PVC pipe glue A majority of the treatment system is made up of newly installed and glued PVC pipe These compounds will no longer exist after several hundred gallons of water are flushed through the newly installed piping and the glue has permanently set A copy of the certified analytical reports are attached in Appendix B The Aeropure Water alternative water supply was disconnected from the • plumbing system after the system's performance was evaluated and found to be operating as designed -2-