[CPEO-BIF] Fwd: Register now for the 2018 Chlorinated Vapor Intrusion Workshop, March 20th

Begin forwarded message:

Free EPA-sponsored webinar on Vapor Intrusion – Tuesday, March 20^th

State-of-the-Science for Indicators, Tracers, and Surrogates of Chlorinated Vapor Intrusion:
Supplemental Measurements for Minimizing the Number of Chemical Indoor Air Samples Needed
Tuesday, March 20, 2018, 8:30 am – 12:00 pm Pacific time. Our deepest apologies for the late notice.

EPA is convening a technical workshop and webinar on vapor intrusion entitled, State-of-the-Science for Indicators, Tracers, and Surrogates of Chlorinated Vapor Intrusion: Supplemental Measurements for Minimizing the Number of Chemical Indoor Air Samples Needed. Please join us in person at the AEHS West Coast Conference[1] or observe and listen via webinar.

Reserve your Webinar seat now at:
https://attendee.gotowebinar.com/register/6137211512398408450

This half-day workshop involves the latest thinking on the use of ‘Indicators, Tracers & Surrogates’ for improving the timing and location of indoor chemical sampling so that a minimum number of samples can provide quantifiable confidence for representing regulatory goals, such as Reasonable Maximum Exposures (RME).

Presenters and Invited Panelists:
Henry Schuver, US EPA, Washington, DC
Chase Holton, Jacobs, Englewood, CO
Christopher Lutes, Jacobs, Chapel Hill, NC
Jeff Kurtz, Geosyntec Consultants, Greenwood Village, CO
Robert Truesdale, RTI International, Research Triangle Park, NC
Lloyd Stewart, Praxis Environmental Technologies, Inc., Burlingame, CA
John Zimmerman, US EPA, Las Vegas, NV
Brian Schumacher, US EPA, Las Vegas, NV
Alana Lee, US EPA, San Francisco, CA

Abstract:
Chlorinated vapor intrusion (CVI) is complex, involving multiple factors and interactions. Only indoor air chemical samples can represent all the factors influencing CVI exposures, but indoor air chemical concentrations are highly variable between buildings and over time, and can be subject to ‘background’ influences. Many indoor samples may be needed to document upper percentile or Reasonable Maximum Exposures (RME). However, because chemical indoor air samples are expensive, difficult to collect, subject to interference, and disruptive to occupants, few samples are typically collected. Fortunately, there are numerous opportunities for related, practical, and inexpensive supplemental measurements that can represent significant portions of the VI pathway and can help both: 1) verify the overall conceptual site model for CVI and 2) identify the most representative/meaningful buildings and times for chemical sampling to minimize the number of samples needed to document confidence levels. Examples of supplemental measurements include indoor/outdoor/ sub-slab temperatures, air exchange rates, pressures, and radon levels. This workshop will present a compilation of the existing high-quality evidence and analyses testing the statistical associations between various supplemental measurements and indoor CVI concentrations across both time and space (buildings). It will explore which portions of the CVI pathway these supplemental measurements best and least represent, along with some cost considerations related to the number and types of samples needed. Steps in the CVI pathway where these supplemental measurements can provide information include: 1) source(s) of the chlorinated chemicals; 2) shallow advective migration; 3) preferential/pipe pathway (direct entry and with via soil gas); 4) mixing/dilution in indoor air; 5) advective driving forces (temperature and pressure differentials, wind, HVAC operation); and 6) exposure point concentrations. Recommendations for future analyses of existing and newly collected data sets will be made, including recommended future research involving more building types in a variety of hydrogeologic and climatic settings, release scenarios, as well as designs for testing the real-world ‘in-field’ practicality of these approaches in ongoing VI investigations.

Webinar Details:
There is no cost to attend this webinar. Attendees may choose to listen using their computer speakers[2]. Participants will have the opportunity to submit questions online during the webinar through the webinar software.

When you register, please be sure to answer the survey question on the number of people attending per line so that we can get an accurate attendance count. After registering you will receive a confirmation email containing information about joining the Webinar. You also will receive a link to the final agenda for the workshop in a separate email.

For more information, contact Jenn Richkus (jrichkus@rti.org) or Robert Truesdale (rst@rti.org).

[1] Applicable conference registration costs apply for in-person attendance.
[2] Although computer speakers are the preferred option, a local number (not toll-free) will be provided in case webinar participants want to use their phones.

[1] Applicable conference registration costs apply for in-person attendance.
[2] Although computer speakers are the preferred option, a local number (not toll-free) will be provided in case webinar participants want to use their phones.
[2] Although computer speakers are the preferred option, a local number (not toll-free) will be provided in case webinar participants want to use their phones.