CC-1000_2018

CC-1000 Companion Guidance (1-2018) CC-1000 Companion Guidance CG Page of 12 Informational 11 CC-1000 Discussion SECTION 9: EXHAUST LOCATIONS 9.1 General 9.2 Outdoors 9.3 Directional spread 9.4 Straight-line trajectory 9.5 Elevation above grade 9.6 Roof 9.7 Separation from openings and people 9.8 Protection from debris 9.9 Increased distances for large capacity systems The point of exhaust discharge, as traditionally for radon gas, is normally above the roof and away from openings in structures. To define better requirements for protective design, the text addresses the cone spread and travel distance of hazardous exhaust air: The directional spread and straight-line trajectory of exhaust air must not encounter building materials, openings in structures and the breathing space where people congregate or traverse. 9.10 Inspect the exhaust vent pipe prior to completion of indoor finishings Advisory — Complete inspection for integrity of the pipe installation is not possible after the pipe is enclosed by wall finishings. SECTION 10: COMPLETION OF SYSTEMS 10.1 Labeling or marking is required 10.2 Systems with no active fan Label requirements are specified throughout CC-1000 for all mitigation systems of any kind. 10.3 Activation with ASD fan Specifications are provided for fan and fan monitor installation. SECTION 11: HVAC EVALUATIONS. 11.1 General 11.2 Controlled negative pressure 11.3 Appropriate designs 11.4 Controls 11.5 Label monitors and controls 11.6 Documented evaluations / actions 11.7 HVAC for supplemental mitigation Natural and mechanically induced negative pressure in enclosed spaces relative to soil must be evaluated and excessive negative pressure must be controlled. Neutral or positive air pressure is preferred. SECTION 12: DOCUMENTATION 12.1 Operation and maintenance plan 12.2 OM&M manual 12.3 OM&M manual recommendation to test for radon A detailed description of the “as installed” system is required in an operation and maintenance plan. The required manual for operation, maintenance and monitoring manual (OM&M) additionally requires monitoring guidance such as frequency of radon testing. SECTION 13: VAPOR INTRUSION 13.1 Lines of evidence 13.2 Duct pipe materials 13.3 Additional fan considerations 13.4 Sealant materials 13.5 Soil gas retarder materials 13.6 System monitors Design considerations for appropriate application of CC-1000 are typically based on existing lines of evidence for chemical vapor intrusion. As a result of soil assessments, system materials and monitoring for concentrations can be required that to verify control over the soil gas migration path. For additional health and safety considerations when the purpose of soil gas control is chemical vapor intrusion, see ANSI/AARST SGM- SF "Soil Gas Mitigation in Existing Homes" .