EPA Science Inventory

FOLLOW-UP ANNUAL ALPHA-TRACK MONITORING IN 40 EASTERN PENNSYLVANIA HOUSES WITH INDOOR RADON REDUCTION SYSTEMS (DECEMBER 1988 - DECEMBER 1989)

Citation:

Scott, A. AND A. Robertson. FOLLOW-UP ANNUAL ALPHA-TRACK MONITORING IN 40 EASTERN PENNSYLVANIA HOUSES WITH INDOOR RADON REDUCTION SYSTEMS (DECEMBER 1988 - DECEMBER 1989). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/8-90/081 (NTIS PB91-127779), 1990.

Description:

The report gives results of 12-month-long alpha-track detector (ATD) measurements of indoor radon concentrations, between December 1988 and December 1989 in the living areas of 38 of 40 houses where radon reduction techniques had been installed 2-4 years earlier in a previous EPA project. The techniques, installed between June 1985 and June 1987, generally involved active soil depressurization. n the 28 houses in which the mitigation system operated the entire year, the annual average was <2 pCi/L in 13, and <4 pCi/L in 22. The residual radon in many houses is due largely to re-entrainment of ASD exhaust. Comparison of these annual ATD results with quarterly results from the past three winters shows that 22 of the 28 houses had annual measurements within I pCi/L of the winter-quarter result. There had been no significant degradation in system performance, except where the mitigation fans failed or where the owner had turned off the system. Six of 34 ASD fans have failed to date.

Purpose/Objective:

information

URLs/Downloads:

NTISCONTACT.PDF   (PDF,NA pp, 8 KB,  about PDF)

Record Details:

Record Type: DOCUMENT (PUBLISHED REPORT/REPORT)
Start Date: 12/31/1990
Completion Date: 12/31/1990
Record Last Revised: 10/07/2008
Record Created: 12/08/2004
Record Released: 04/02/2005
OMB Category: Other
Record ID: 126192

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL RISK MANAGEMENT RESEARCH LABORATORY

AIR POLLUTION PREVENTION AND CONTROL DIVISION

INDOOR ENVIRONMENT MANAGEMENT BRANCH