SGM-SF_2017with 12/20 Revisions

Vapor Intrusion (VI)—Informational Guidance 62 ANSI/AARST SGM-SF 2017 (with 1220 revisions) Soil Gas Mitigation Standards for Existing Homes A-2.2 Mitigator needs Informative advisory —When commissioning goals include reduction of soil gas entry, needs of a Soil Gas Mitigation Professionals include: a) A specific Scope of Work; b) Overall remediation goals with current strategy and rationale for design and objectives; c) Known Hazards for each building being mitigated to include, among others: – chemical(s) of concern, regulatory action levels for site classification and toxicology standards. – a determination for any need, or if there is not a need, for special considerations during removal, handling and control of hazardous substances; d) Information needed to achieve appropriate system design and implementation. e) Quantifiable Goals and Objectives, including the extent of reductions for soil gas entry needed to achieve mitigation goals; and f) Project Management Specifications, such as contractor qualification requirements, deliverable and reporting schedules, and payment terms. Note—See the Companion Guidance for sample RFP content.) A-2.3 Communication plan Informative advisory —A written plan should be developed in coordination with the overseeing team (i.e., senior staff, RP , oversight staff and communications staff) for communicating throughout the process to all affected parties. As appropriate, regulatory authorities and owners of affected properties that are not owner - occupied residences should participate in developing the plan. Recommended components include: a) Specify which management staff member is responsible for onsite activities. b) Specify the structure of additional communication paths between senior staff, facilitating staff, maintenance staff, measurement service provider(s) and the qualified soil gas mitigation professional . c) Identify and provide contact information for those individuals who are authorized to respond to inquiries from owners, occupants and the public. d) Develop notices (with instructions, general information and information on whom to contact for inquiries) that may be specific for each affected audience, including: 1. facilitating staff that might normally include oversight staff, building managers, maintenance managers and other supervisors. 2. occupants of the building. Note—See notice examples in Exhibits B and C . e) Develop timetables and means for distribution of notices. A-2.4 Guidance regarding proposals. Informative advisory —In addition to proposal requirements in Section 4.2 : a) If not already provided in a Request for Proposal received, the contractor should request of the client information as to whether the site is listed as classified by the state or other jurisdiction; b) The contractor should include in proposal content, in accordance with Section 4.2.2 f and Section 13.7.2.1 c any additional limits the contractor places on the stated scope of work relative to degree of participation in an operations, maintenance and monitoring plan ( OM&M ) and any handling and control of hazardous substances. Note—It is customary practice that contractors limit their scope of work and transfer certain obligations in writing to the client or Responsible Party. Common examples include significant or incidental handling, capture, disposal and management of contaminated substances such as contaminated soil, groundwater, condensate and vapor that exceed regulatory limits. c) Cost estimates as required in Section 4.2.2 e should include total ownership costs for installation, operating and additional monitoring costs across a 5-year period.