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pf_03154
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Last modified
7/17/2007 12:47:21 PM
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12/8/2004 3:55:03 PM
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<br />J <br /> <br />1 <br />I <br /> <br />Veritas is in the process of preparing an update to the ISP Permit Application <br />submitted to the MPCA and approved in 1997. This application will include <br />extensive analysis to estimate the potential impact of the proposed project upon <br />air quality in the vicinity of the site. This analysis focuses upon carbon monoxide <br />(CO), which is the primary pollutant of concern with vehicle emissions. For <br />purposes of responding to this section of the EA W, calculations predicting carbon <br />monoxide levels in the vicinity of the development have been conducted. Data <br />used in the CO calculations for this EA W has been discussed with the MPCA and <br />are incorporated into the ISP application. It is anticipated that a final ISP <br />application will be submitted in the near future. <br /> <br />The basic methodological approach used in performing CO calculations for ISP <br />Permit Applications, and this analysis, is as follows: <br /> <br />1. Establish an assessment year defmed as one year following the anticipated <br />occupancy of the project. <br />2. Determine busiest intersection in the vicinity of the project which will be <br />significantly impacted by the project (source intersection). <br />3. Project CO levels generated at the source intersection for the assessment year <br />by non-project traffic in combination with project-related traffic. <br />4. Determine potentially sensitive receptors which could be impacted by CO <br />dispersion from the source intersection. <br />5. Model CO dispersion from the source intersection to the identified receptors. <br />6. Add the CO from the source intersection to projected background CO levels, <br />and compare this sum to state air quality standards for CO concentrations. <br /> <br />J <br />1 <br /> <br />The year 2004 has been established as the assessment year (estimated one year <br />after development). Source intersections modeled in this analysis were <br />determined to be the intersection of Cleveland A venue and County Road C and <br />Cleveland Avenue and County Road D. Vehicular CO generation for 2004 at the <br />source intersection was projected using MOBILE5a with traffic projection <br />information from Benshoof and Associates, Inc. referenced in Response 22. <br />Receptor locations for the modeling study were selected based upon locations <br />where the general population may be during the appropriate averaging times for <br />the MPCA CO standard (one hour and eight hour). The receptor locations used <br />in the ISP analysis for the proposed project are identified in Figure 10. CO <br />dispersion from the source intersections to the receptor locations was modeled <br />using the CAL3QHC model. Background CO levels for the area were based <br />upon historical data projected to 2004 levels taking into account anticipated <br />overall increases in traffic levels and other factors. The methods and procedures <br />used in this analysis were consistent with Indirect Source Permit Application <br />Guidelines provided by the Minnesota Pollution Control Agency. <br /> <br />Page 25 <br />
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