SGM-SF_2017with 12/20 Revisions

Radon—Documentation (OM&M) 37 ANSI/AARST SGM-SF 2017 (with 1220 revisions) Soil Gas Mitigation Standards for Existing Homes b) Relevant radon mitigation certification and/or licensing number; and c) Signature (manual, or electronic in conformance with the Electronic Signatures in Global and National Commerce (E-SIGN) Act). g) Additional retest guidance to be provided in the information package: “In addition to a retest every two years to ensure the mitigation system effectiveness, radon concentrations should also be retested when any of the following circumstances occur: ü A new addition is constructed or alterations for building reconfiguration or rehabilitation occur; ü A ground contact area not previously tested is occupied or a home is newly occupied ; ü Heating or cooling systems are alteredwith changes to air distribution or pressure relationships; ü Ventilation is altered by extensive weatherization, changes to mechanical systems or comparable procedures; ü Sizable openings to soil occur due to: - groundwater or slab surface water control systems are added or altered (e.g., sumps, drain tiles, shower/tub retrofits, etc.) or - natural settlement causing major cracks to develop; ü Earthquakes, construction blasting, or formation of sink holes nearby; or ü An installed mitigation system is altered or repaired.” 10.1.2 Historical Information Other information for future reference and operation or repair considerations shall be provided either in an information package that contains the OM&M plan or independently distributed, to include: a) Pre-and post- mitigation test data, if available; c) Copies of contracts and warranties; d) Copies of building permits when required and available; and e) An estimate of the annual operating costs. 10.2 When Not Owner - Occupied For systems not individually maintained by the individual owner and occupier of the home, the contractor shall provide the client(s) an information package or system operations manual that additionally includes components of an OM&M plan, in accordance with Section 13.7.2 and Table 13.7 . 10.3 If Non- ASD Systems are Installed The OM&M plan shall prominently include additional recommended testing in accordance with Section 12 (Non- ASD Systems) and maintenance guidance in accordance with Section 13.7.2 and Table 13.7 . s