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Stacy Higa, Chairman <br />and Members of the County Council <br />Page 7 <br />various diesel generators and combustion turbines, vehicular traffic on Queen <br />Kaahumanu Highway, and aircraft at the Kona International Airport at Keahole. Noise <br />control treatments have been implemented for the existing plant equipment. Each <br />treatment project will specify property line sound level targets for the equipment. These <br />targets will vary with a goal of meeting HELCO's overall property line target of 55dBA <br />during daytime operation and 45 dBA during nighttime operation for all plant equipment. <br />Emissions from the Keahole Generating Station have been monitored by air <br />quality monitoring stations located approximately 1.2 miles southeast of the plant and 3.4 <br />miles north of the plant. The monitoring data confirms compliance with State and <br />Federal ambient air quality standards for SO2 (sulfur dioxide), PM10 (particulate matter), <br />and CO (carbon monoxide). A study titled "Climate and Air Quality Assessment" was <br />conducted by Jim Clary & Associates in July, 2004 (Appendix I). Robert E. Paull <br />prepared a report titled Emission Studies — Impact on Keahole Agricultural Park, dated <br />June 27, 2004 (Appendix L). The report examined the potential impacts of ethylene, <br />sulfur dioxide (SO2) and nitrous oxide (NO2) on plants and crops in the Keahole area. <br />Given the infrequency and short duration of plume impact from the stacks on the <br />agricultural park and the lack of information on orchid phytotoxicity to these gases, it was <br />difficult to determine the impacts. The plume's short duration made extrapolation from <br />research results difficult as most of the research was based on continuous chronic <br />exposure of 24 hours or more. Phytotoxi city would not be immediately apparent under <br />these circumstances. Given these conditions, cumulative response would not be expected <br />with the impact duration and dose levels expected to affect the Keahole Agricultural Park. <br />A reduction of ethylene levels is anticipated as the diesel generators are phased out and <br />simple combustion cycle and combined cycle combustion turbines are used exclusively, <br />In view of the Hawaii State Supreme Court's "PASH" and "Ka Pa'akai O <br />Ka'Aina " decisions, the issue relative to native Hawaiian gathering and fishing rights <br />must be addressed in terms of the cultural, historical, and natural resources and the <br />associated traditional and customary practices of the site: <br />Investigation of valued resources: The following information was submitted for <br />IZMIR" <br />Archaeological and Cultural Impact Assessment Study, Paul H. Rosendahl, Ph.D., <br />Inc. (PHRI), February, 2004. (Appendix K) <br />Avifaunal and Feral Mammal Field Survey of Keahole Generating Station North <br />Kona, Island of Hawaii, Phillip L. Bruner, July 31, 2003. (Appendix B) <br />