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page 2 <br /> B.O.H. Meeting, ot. , 1 , 1989 <br /> The estimated cost of $13, 500 is based on the amount of water the system has t <br /> treat. This amount includes the design and installation. <br /> M . Storrs asked Mike whether all Cape water is "highly cor;ros i ve"' <br /> Mr. Soi.pione responded that all cape waters are corrosive but not neesari ly <br /> highly corrosive, this any depend on at what depth in the sole source aquifer the <br /> water is being drawn from. <br /> Mr. Storrs stated the High Wood Water currently meets all the McL levels, however, <br /> these levels are currently being reviewed by both the state and Federal Govts.We <br /> can only anticipate what they will be. The easiest way for High good to treat <br /> their water would be at the new pump station and the estimate of it going on line <br /> within six months is based on the hopes that the new MCLI s will be determined by <br /> then. We don't know what the specifics of the system will be until the nowstan- <br /> dards are set. We are nearing the end of a two year process in adopting an anti- <br /> corrosion control program. Evential ly all water companies will have to institute a <br /> program to control corrosivity, but doubts that any company will prior to the new <br /> MCL' s being set. <br /> Mr. Rich stated that the system they install may not neocesarily solve the problem <br /> at the school . We will try to meet the new standards when they are set and even if <br /> we do it will not be a guarantee that the water at the tap will also meet the new <br /> standards. if we cannot meet the new standards, we will not neooesarily b in <br /> violation because we will have made a good faith effort to do so. The State realizes <br /> that it cannot say that if you do A,B & C you will be guaranteed that every tap <br /> water will meet the new standards., <br /> Mr. Greelish reaffirmed an earlier conclusion that High Wood Water is safe and <br /> meets the current standards. The Board wanted Weston & Sampson to conclusively <br /> state that the high lead concentrations are the result of the corrosivity of the <br /> water based on data available. It could have been improper flushing after the <br /> plumber chlorinated. We now know the lead levels w111 go down after flushing. <br /> Mr. dunes stated that the data leads him to beleive that there really isn't much <br /> of a problem since previous rounds of sampling after a flush show no considerable <br /> amounts of lead. He suggested that we d i dnot flush and sample long enough, <br /> Mr. Greelish stated that the reason why the flushing and sampling was pint on hold <br /> was to give Weston & Sampson the neooesary time to determine what was the cause <br /> of the extremely high lead levels in the first and second rounds even after a flush. <br /> There were numerous unanswered questions, such as was there chlorine in the system, <br /> was the wrong solder used, were the fixtures proper? . Now we have a determination <br /> that the corrosivity of the water is the probable cause of the lead readings. <br /> Mr. Costa stated that due to the lenght of time it will take High Woad to install <br /> their control program and the fact that it may not solve the problem., perhaps the <br /> school building committee ought to be urged to have a treatment system installed <br /> at the school . <br /> OW <br /> Mr. Jones indicated that-the data does not warrant that- suggestion. The results are <br /> too consistently low following a f 1 ush.He sees no cause for concern about lead at <br /> the school and recommended taking onlyione sample at the .previously worst location. <br /> Mr. Costa agreed to go with the flushing r first for a month and then re-evaluate. <br /> r , <br /> i <br /> M ti , <br />