pf_02888 - Laserfiche WebLink

Home

In addition to adjusting the 1997 measured CO background concentrations using the factors doscribed above, the background concentration for the year 2000 must also include the effects (if any) of the two projects listed above. Because the Centre Pointe and Twin Lakes Business P,ark developments are both located far enough from the proposed project that traffic generated from these developments will not impact the intersections being impacted by the proposed pJroject, no further adjustment of the CO background concentration is considered appropriate. CO receptors were placed around the two most impacted intersections and the CAL3QHC model was run once for each intersection using data from the traffic study. The results are summarized in Table 23.1. Table 23.1 1-Hour and 8-Hour Modeled CO Concentrations ReceptorlWind Direction with Highest CO Concentration 1-Hour concentrations (ppm) 8-Hour concentrations (ppm) Project Total (incl. bckgrd 1) County Road 82 at Long Lake Road MN State Standard Project Total (incl. bckgrd ~ MN State Standard 1 (SE): 280 degrees 9.8 30.0 7.0 9.0 County Road 82 at Cleveland Avenue 1 (SE): 280 degrees 9.2 30.0 6.5 9.0 1 1-hour CO background concentration of 2.0 ppm. 2 8-hour CO background concentration of 1.5 ppm. A.s seen from Table 23.1, no violations of the Minnesota ambient air quality standards for CO are projected for the year 2000, one year after construction of the proposed project. Therefore, no significant adverse impacts on air quality are anticipated from the proposed project. 24. Stationary source air emissions. Will the project involve any stationary sOurces of air emissions (such as boilers or exhaust stacks)? -L.. Yes No If yes, describe the sources, quantities, and composition of the emissions; the JJlroposed air pollution control devices; the quantities and composition of the emissions after treatment; and the effects on air quality. The project will be heated by a natural gas mechanical system. The plant will generate carbon dioxide, smaller quantities of nitrous oxides, and very small amount of other combustion by products. All emissions are expected to be far below thresholds for new source permitting. E:missions will be vented through a roof stack. Effects on air quality from the system are expected to be negligible. If industrial uses by tenants results in air emissions, the businesses will be required to obtain all required air quality permits. 2362468\48185-1f.r~ 14