SGM-SF_2017with 12/20 Revisions

Health and Safety 40 ANSI/AARST SGM-SF 2017 (with 1220 revisions) Soil Gas Mitigation Standards for Existing Homes 11.2.4 Lead-based paint Note—Common renovation activities such as sanding, cutting and demolition can create hazardous lead dust and chips by disturbing lead-based paint, which can be harmful to adults and children. 11.2.4.1 Informative advisory —Any activity that disturbs paint (unless it is known by testing to not be lead-based paint) in pre-1978 target housing is subject to the EPA Lead Renovation, Repair and Painting (RRP) rule (40 CFR 745, Subparts E and Q). EPA has established the Lead-Safe Certification Program for contractors in response to this concern. For more information, see www.epa.gov/getleadsafe In addition, all target housing that is federally owned and target housing receiving federal assistance fall under “The Lead Safe Housing Rule” (24 CFR Part 35 Subparts B through R). Please refer to Subpart R—Methods and Standards for Lead-Paint Hazard Evaluation and Hazard Reduction Activities (24 CFR Section 35.1300 through 1355) for HUD specific methods and standards that would be applied for target housing. The Lead Safe Housing Rule is available at www.hud.gov/healthyhomes Additional information is available at HUD’s Office of Healthy Homes and Lead Hazard Control. www.hud.gov 11.3 Radon Mitigation All mitigation installers for radon reduction systems shall be advised of the hazards of exposure to radon and the need to apply protective measures when working in areas of elevated radon concentrations. Each installer’s exposure to radon at each work site shall be recorded and maintained in a manner as required by jurisdictions of authority. For calculating exposure estimates: Working Level Month (WLM) calculations shall be based upon the mitigation installer’s exposure hours times radon measurements ( pCi/L ) divided by 100, divided by 170. Calculations for pCi/L /day shall be based on the mitigation installer’s exposure hours, divided by 24. These calculations shall apply to one of the following radon or radon decay product measurements for the mitigation installer’s exposure at each work site: a. The highest pre- mitigation indoor radon measurement; b. Actual jobsite measurements of radon; or c. Themeasurements froma radon dosimeter such as an alpha track or comparable device consistently worn at the job site by a mitigation installer . The radon dosimeter shall be stored in a low- radon environment during nonworking hours, and thereby all exposure to the radon detector is assumed to be the mitigation installer’s exposure. A mitigation installer’s exposure shall be limited to less than 5,700 pCi/L /days or 4 working level months ( WLM ) over any 12-month period. An equilibrium ratio of 100% shall be used to convert radon levels to radon decay product levels. Practices shall be arranged to keep mitigation installer’s WLM or pCi/L /day exposure as low as can be reasonably achieved. 11.4 Chemical Vapor Mitigation 11.4.1 Understanding chemical exposure Informative advisory —Three groups of people, or “receptors,” can potentially be exposed to chemical contaminants other than radon at residential locations where mitigation systems are installed: system installation personnel, systemmonitoring personnel and residents. See Table 11.4.1.