Ordinance No. 19777 - Laserfiche WebLink

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The highest projected concentration in LRAPA's model occurs right next to the plant on the western side of the 100-foot railroad right of way, over 504 feet from any potential residential use, only under speck wind direction, wind speed, and air stability conditions. This level is approximately one-half the level to which workers may be exposed continuously for eight hours a day, 30o days a year under ,the Federal Occupational Health and Safety Act ~DSHA}. The 45HA standard is ~.2 parts per million, or 1,504 micrograms per cubic meter, compared with the measured .001 ppm. or < 1 micrograms/cubic meter actually measured in the .monitoring tests described above. The highest projected concentration occurring outside the proposed buffer area, according to LRAPA's models, would be only one third of the eight-hour, Soo-day-peryear DSHA standard. Furthermore, these exposures would, according to the model, occur with far less frequency than the daily exposure assumed by the OSHA standards. For example, the highest concentration on the site, which occurs at the west side of the Burkland property next to the railroad right of way just east of the Neste .plant, occurs only about one percent of the time, compared to the S-hour daily exposure of double that concentration permitted for workers at the plant site. LR.APA's model assumes that the wind flows generally from west to east toward the Springwood site about 25 percent of the time. The rest of the time the wind will be blowing the plant's emissions in other directions. The most common condition on the site will be a zero concentration, because the wind will be blowing in another direction, when the wind is from the west, concentrations at any given distance will often be at or near zero, and will only occasionally and briefly approach the highest concentrations, which themselves are .well below the DSHA standards. The most frequent combination of west-to-east direction and any given air stability condition is about 13 percent, which is to say that about 13 percent of the time the wind will be flowing generally west to east under stability condition D. The highest concentrations projected for the entire site occur when the wind is at one mile per hour under these conditions, or about 8.5 percent of the time that all other conditions are present. Eight and a half percent of 13 percent is 1.15 percent. The Springfield area is near or above its carrying capacity for particulates and EPA criteria pollutants. The applicant has agreed to a restriction under the proposed plan amendment that would prohibit the installation or use of woodstoves and fireplaces in any residence on the subject property. This restriction will allow socially and economically desirable development of this serviced urban land without the air pollutants that would be a natural consequence of development of the property with heavy and medium industrial uses under the current land use designations. It would also make the proposed community one of the least, if not the least polluting residential development in the Eugene-Springfiield Metro area. Goal 7 -Areas Subject to Natural Disasters and Hazards. This goal requires that in areas of natural hazards, such as landslides and floods, developments must incorporate appropriate safeguards. Springwood Plan Amendment Application Applicant's Proposed Findings March 20,1991 Drab Page 4