Indoor air concentration of chlordane, and its seasonal variation

1994 ◽  
Vol 52 (4) ◽  
Author(s):  
F. Asakawa ◽  
F. Jitsunari ◽  
N. Takeda ◽  
Y. Manabe ◽  
S. Suna ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Indoor Air ◽  
Air Concentration

scholarly journals Corrigendum: Leppänen HK, et al. (2014). Determinants, reproducibility, and seasonal variation of ergosterol levels in house dust. Indoor Air, 24(3), 248‐259.

Indoor Air ◽  
2020 ◽  
Vol 30 (3) ◽  
pp. 553-553
Author(s):  
Hanna K. Leppänen ◽  
Aino Nevalainen ◽  
Asko Vepsäläinen ◽  
Marjut Roponen ◽  
Martin Täubel ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Indoor Air ◽  
House Dust

scholarly journals Evaluating Volatile Organic Compound Emissions from Cross-Laminated Timber Bonded with a Soy-Based Adhesive

Buildings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 191
Author(s):  
Michael Yauk ◽  
Jason Stenson ◽  
Micah Donor ◽  
Kevin Van Den Wymelenberg
Keyword(s):  
Organic Compound ◽  
Volatile Organic Compound ◽  
Indoor Air ◽  
Wood Products ◽  
Air Concentration ◽  
California Department ◽  
Voc Emissions ◽  
Cross Laminated Timber ◽  
Acceptance Criterion ◽  
Volatile Organic

Volatile organic compound (VOC) emissions from indoor sources are large determinants of the indoor air quality (IAQ) and occupant health. Cross-laminated timber (CLT) is a panelized engineered wood product often left exposed as an interior surface finish. As a certified structural building product, CLT is currently exempt from meeting VOC emission limits for composite wood products and confirming emissions through California Department of Public Health (CDPH) Standard Method testing. In this study, small chamber testing was conducted to evaluate VOC emissions from three laboratory-produced CLT samples: One bonded with a new soy-based cold-set adhesive; a second bonded with a commercially available polyurethane (PUR) adhesive; and the third assembled without adhesive using dowels. A fourth commercially-produced eight-month-old sample bonded with melamine formaldehyde (MF) adhesive was also tested. All four samples were produced with Douglas-fir. The test results for the three laboratory-produced samples demonstrated VOC emissions compliance with the reference standard. The commercially-produced and aged CLT sample bonded with MF adhesive did not meet the acceptance criterion for formaldehyde of ≤9.0 µg/m3. The estimated indoor air concentration of formaldehyde in an office with the MF sample was 54.4 µg/m3; the results for the soy, PUR, and dowel samples were all at or below 2.5 µg/m3.

scholarly journals Accuracy, Conservatism and Parsimony of Three Vapour Intrusion Models Used in Sweden

2018 ◽  
Vol 12 (10) ◽  
pp. 128
Author(s):  
Jeroen Provoost ◽  
Stephanie Nouwen ◽  
Jan Bronders
Keyword(s):  
Indoor Air ◽  
False Negative ◽  
Point Estimate ◽  
Soil Parameters ◽  
Chemical Parameters ◽  
Air Concentration ◽  
Deterministic Analysis ◽  
Physico Chemical ◽  
Parsimonious Model ◽  
Parameter Values

This study presents an evaluation of three screening-level models, namely the Dilution Factor (DF) model from 1996, the update version from 2005, as well as the Johnson and Ettinger model (JEM) from 1997, that are applied within the frameworks for contaminated land management (CLM) in Sweden. This evaluation applies, besides a deterministic approach (point estimate), a probabilistic assessment plus sensitivity analysis. The latter approach allows the models to be ranked according to conservatism, accuracy and parsimony by contrasting predicted and observed soil and indoor air concentrations for two contaminants (benzene and ethylbenzene), as to determine their suitability for application within CLM. The results and conclusions from this study suggest that the most accurately model for predicting the soil and indoor concentration is the JEM followed by the DF 2005 and 1996. Predictions of the soil air concentration are primarily driven by variation in physico-chemical parameters. The variation in indoor air concentration by physico-chemical and/or soil parameters for the DF models, while for the JEM soil parameters dominate. The deterministic analysis showed that default parameter values could be revised as to increase the conservatism, and be closer to the probabilistic 95-percentile predicted indoor air concentration. The DF 1996 model includes a limited number of parameters, and this analysis shows that a model with more parameters is more accurate, and less conservative. The DF 2005 seems to be the most parsimonious model as it is accurate, sufficiently conservative, and has 14 parameters, whereas the DF 1996 with 9 parameters is the most conservative and the JEM with 27 parameters the most accurate with an increased probability to produce false negative predictions. For the latter some of the dominant parameters cannot easily be measured on site.

scholarly journals Indoor Air Concentration from Selective Laser Sintering 3D Printer using Virgin Polyamide Nylon (PA12) Powder: A Pilot Study

2019 ◽  
Vol 11 (5) ◽  
Author(s):  
Amir Abdullah Muhamad Damanhuri ◽  
◽  
Azian Hariri ◽  
Mohd Rizal Alkahari ◽  
Muhammad Hafidz Fazli Md Fauadi ◽  
...  
Keyword(s):  
Pilot Study ◽  
Indoor Air ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
3D Printer ◽  
Air Concentration

scholarly journals Transfluthrin indoor air concentration and inhalation exposure during application of electric vaporizers

2013 ◽  
Vol 60 ◽  
pp. 1-6 ◽  
Author(s):  
Aude Vesin ◽  
Philippe Glorennec ◽  
Barbara Le Bot ◽  
Henri Wortham ◽  
Nathalie Bonvallot ◽  
...  
Keyword(s):  
Indoor Air ◽  
Inhalation Exposure ◽  
Air Concentration

Seasonal variation of indoor air radon concentration in schools in Kosovo

2007 ◽  
Vol 42 (2) ◽  
pp. 286-289 ◽  
Author(s):  
M. Bahtijari ◽  
P. Stegnar ◽  
Z. Shemsidini ◽  
H. Ajazaj ◽  
Y. Halimi ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Indoor Air ◽  
Radon Concentration
Sign in / Sign up

Export Citation Format

Share Document