the moist mucous membrane of the upper respiratory tract and a public emergency limit (PEL) related to accident conditions that might result in some irritation but with reversible effects. The space shuttle study indicates that all ground cloud concentrations are below the STPL and PEL values. In addition to these air quality impacts, the testing of rocket engines, testing of orbital maneuvering systems and reaction control systems, and test flights will also result in the release of air pollutants. The effects of these from SPS deployment have not been studied and will be as part of the research program. Launch and Recovery Water Quality Impacts. No assessment has been made of the water quality effects of the launch and recovery of SPS vehicles; however, some information is available for the space shuttle (Ref. 2.8.9). Potential pollutants enter the water through contamination of the launch pad cooling water with engine exhaust products, removal of ablative insulation from reentry vehicles with high pressure water jets, and possibly from spillage of residual propellant if the launch vehicle is recovered from the ocean. The first two conditions can be controlled by onsite water treatment facilities and would not normally present a public health problem. Suggested maximum allowable concentrations for propellant spills are shown in Table 2.5. Table 2.5. Suggested Maximum Allowable Concentrations of Propellants in Water
RkJQdWJsaXNoZXIy MTU5NjU0Mg==