Title: Identification of routes of intrusion for perchloroethylene penetration to indoor air :“sniffing” method 
Resource Type: document --> technical publication --> report 
Country: Denmark 
Language(s): Danish
Year: 2004 
Availability: Environmental project, Miljørapport nr. 958 
Author 1/Producer: Fuglsang, Karsten 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Publisher: The Danish Environmental Protection Agency, Miljøstyrelsen 
Publisher City: Strandgade 29, DK-1405 Copenhagen K, Denmark 
ISBN: 87-7614-405-4 
Report / download web link (=direct link): http://www2.mst.dk/common/Udgivramme/Frame.asp?pg=http://www ...  
Format (e.g. PDF): PDF 
Size: (e.g. 20mb) 769 
EUGRIS Keyword(s): Contaminated land-->Site investigation-->Initial studies
Contaminated land-->Site investigation-->Methods
Contaminated land-->Site investigation-->Sampling and analysis
Contaminated land-->Site investigation-->Sampling strategy
Short description: This report describes a new method (sniffer) for finding routes of intrusion of chlorinated solvents such as perchloroethylene (PCE) from soil pollution into indoor air in buildings via cracks in concrete floors, or flaws in building constructions. 
Long description: The sniffing method comprises a flexible broad nozzle that can tightly cover an area of floor, crack or wall so that the air under the nozzle can be sucked to a gas detector without dilution. The flexible nozzle was optimised in terms of shape and material using a laminated aluminium/Mylar film. A photoionisation detector (PI-detector) provided a suitable response time of less than 60 seconds and measurement range of 0.5 mg/ m3 - 10 mg/m3. The sniffing method was tested at four different sites in rooms above or below a dry cleaning establishments and measurement points were placed in a grid of about 1m x 1m over the floors and walls. At two sites, the route of entry was identified as cracks around the sewer pipes and under the doorstep. At the other two sites, the sniffing method was used as a rapid survey method to identify “hot spots” with high intrusion which could then be quantified by means of another more time-consuming and expensive method using emission flux measurements. These measurements allowed the contribution from the underlying contamination to be calculated. 
Submitted By: Dr Jacqueline Falkenberg WhoDoesWhat?      Last update: 02/04/2007