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Page Three <br /> <br />sampling to occur on every day <br />of the week during a one-year <br />time period. <br /> <br />Once set up, the instruments will <br />automatically start at the <br />prescribed time and collect a <br />sample for 24 hours and then <br />shut off. About 60 samples will <br />be collected at each site for <br />VOCs, carbonyl compounds, and <br />metals in the particulate <br />mater/al. <br /> <br />The site operator must prepare <br />the instruments for sampling by <br />placing new filters and VOC <br />canisters in the insmaments and <br />then collect the samples, f'fll out <br />some simple information and <br />ship them to the MPCA. MPCA <br /> <br />staff will collect the samples <br />themselves at as many sites as <br />possible. However, some private <br />operators will be needed for <br />some. of the sites, and the MPCA <br />will provide training and funding <br />for these private operators. <br />Volunteers are always welcome. <br /> <br />When the monitors be <br />installed? <br /> <br />Ideally, a new site is prepared 30 <br />days in advance of the year-long <br />sampling period. Site preparation <br />includes constructing a site <br />platform or pallet, establishing <br />power and training an operator <br />(which should take just four to <br />six hours). <br /> <br />Since we have instruments for <br />only seven sites, at the end of the <br />year the sampling at each <br />location will end, and the <br />instruments will be moved to the <br />new sites. We hope the change- <br />over can take place over a two- <br />week per/od. <br /> <br />More questions? <br /> <br />For more information about the <br />toxic air pollutants study, please <br />contact either Don Bock in the <br />Air Analysis Unit at <br />(612) 296-7329 or Cliff <br />Twaroski in the Air Toxics Unit <br />at (612) 296-7757. <br /> <br />This information can be made available in other formats <br />including Braille, large type and audiotape. TTY users, call <br />(612) 282-5332. <br /> <br /> <br />