SGM-SF_2017with 12/20 Revisions

2 ANSI/AARST SGM-SF 2017 (with 1220 revisions) Soil Gas Mitigation Standards for Existing Homes 1.2.7 Design and warranties This standard is not intended to be used as a designmanual, and compliance with its provisions will not guarantee reduction of indoor radon to any specific concentration. 2.0 APPLICABILITY 2.1 Mandatory Conventions The terms “shall”, “required” and “normative” indicate provisions herein that are considered mandatory. Terms such as “should,” or “recommended” and provisions prefaced by the term “Note” or “Informative” indicate provisions that are considered to be helpful or good practice, but which are not mandatory. 2.2 Prior Systems This standard shall not apply to mitigation systems installed prior to its effective date, except when a previously installed system is altered. This standard shall apply to only the aspects of the system that are altered, and the contractor shall recommend to the client in writing that the noncompliance items be upgraded or altered to meet current standards. For the purposes of this standard, altering a radon mitigation system does not include activities such as replacing worn out equipment while leaving the remainder of the system unchanged. 2.3 Adoption and Use 2.3.1 Soil gas mitigation objectives Note—A Soil Gas Mitigation system can be installed to meet one or more of the following objectives: a) Reduce radon below the international, federal, state, or recognized reference level or action level on indoor radon or below an agreed-upon concentration for indoor radon; b) Reduce chemicals of concern (COCs) or other hazardous gas or vapor from soil gas to below applicable state and/or federal guidelines and/or standards in indoor air or below an agreed-upon concentration over an agreed-upon period of time in indoor air; c) Provide proactive soil gas mitigation : Proactive systems are the result of preemptive action based on suspected hazards rather than hazards confirmed by measurements. Proactive systems shall comply with all provisions of this standard, with the exception of gas concentration measurements that are recommended but not required; and d) Provide emergency or rapid response with temporary mitigation means. See Section 13.6 . 2.3.2 Limits to application Practices for installing radon reduction systems shall comply with all provisions of this standard with the exception of Section 13 . Practices for installing systems to reduce hazards from chemical vapor intrusion shall comply with all provisions of this document with the exception of Sections 9 and 10 . 3.0 QUALIFIED CONTRACTORS 3.1 Contractors The use of the term “Contractor” within this standard refers to any person(s) or contracting firm, regardless of the organizational structure of the entity that installs a mitigation system. 3.2 Contractors, Teams and Qualifications The contractor , contracting team, or management team shall include individuals who have appropriate technical knowledge, skills, and experience required to mitigate soil gas concerns, including at least one “Qualified Radon or Soil Gas Mitigation Professional. 3.2.1 Qualified radon mitigation professional A “Qualified Radon Mitigation Professional” for the purposes of this document is defined as: “An individual that has demonstrated a minimum degree of appropriate technical knowledge and skills specific to radon mitigation of existing homes: