Hot Dipped Galvanized Portable Horse Stall Panels horse boxes

This Plan describes and analyzes four alternatives—three action alternatives and one no action alternative—for the improvement and location of the stables. The purpose of the Plan is to provide for comprehensive improvement of equestrian sites, facilities, programs, and stables management within the GGNRA. The Plan is designed to improve visitor services and preserve, protect and enhance Park natural and cultural resources in a manner consistent with NPS plans and policies. Both the Park and the existing stables operators have identified the need for a comprehensive plan that will guide GGNRA stables into the future. There is a need to determine the appropriate number of horses to be stabled in GGNRA southern Marin stables in consideration of site capacity, horse health and financial feasibility for business operations. This Plan determines appropriate facilities for horses and the public and establishes Best Management Practices at the stables to better address potential impacts to water quality, restoration of historic structures and preservation of cultural landscapes. Comments: The EA will be available for public review and comment for 45 days. Review copies are available at Golden Gate National Recreation Area Headquarters (Building 201 Fort Mason, San Francisco, CA) and the following local libraries: Marin County Free Library; Mill Valley Public Library; Pt. Reyes Station Library; Sausali to Public Library; and San Francisco Public Library Main Branch. Comments must be submitted or postmarked on or before December 16, 2011. Comments may be submitted online at http://park planning.nps.gov/mesp (click on project and follow instructions), or by mail to: Superintendent, Fort Mason Building 201, San Francisco, CA 94123, Attn: Marin Equestrian Stables Plan). Written comments received on the EA will be reviewed to determine whether any important new issues or reasonable alternatives or mitigation measures have been suggested. If major substantive issues are raised which point to the potential for significant impacts, an Environmental Impact Statement would be prepared, otherwise a Finding of No Significant Impact (FONSI) will be prepared. Questions regarding this project may be directed to the NPS Project Manager, Andrea Lucas (415.561.2878), or emailed to: goga_planning@nps.gov.

To examine the effects of installing a mechanical ventilation system at a riding-school stable on indoor air quality and human and horse airways. The intervention was the installation of mechanical ventilation in a riding-school stable. Carbon dioxide (CO2), ammonia, particles, horse allergen, microorganisms and endotoxins were measured in the stable. The stable-workers and riding-students completed a questionnaire and underwent the following tests: analysis of nasal lavage for inflammation biomarkers; levels of exhaled nitrogen oxide (NO); measurements of daily peak-expiratory flow (PEF). The horses were examined clinically by airway endoscopy and bronchoalveolar lavage (BAL) and were analysed for cytology and biomarkers. Levels of CO2 were nearly halved and airborne horse allergen levels were markedly reduced (5-0.8 kU/m3) after the intervention. A decreased level of ultrafine particles was observed (8000-5400 particles/cm3) after the intervention, while total and respirable dust levels were mainly unchanged (200 and 130 μg/m3).

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