Heinzow B.,Landesamt fur Soziale Dienste des Landes Schleswig Holstein |
Ostendorp G.,Landesamt fur Soziale Dienste des Landes Schleswig Holstein |
Werner G.,Fachdienst Gesundheit |
Hahn A.,Bundesinstitut For Risikobewertung Bfr
Gefahrstoffe Reinhaltung der Luft | Year: 2012
Double-shell masonry construction with a cavity of 6 to 8 cm between the two walls is common in Northern Germany. To improve the energy efficiency, core insulation with foam has been advertised more recently. The German Institute for Building Construction (DIBt) has approved a technical procedure where insulation material is blown between the inner and outer layer of the brick walls. We report a case study following an insulation of the cavity with an urea-formaldehyde-foam (UF-foam). In the course of 3 months following the application of the foam, formaldehyde in indoor air was measured between 200 μg/m3 and 900 μg/m3 in the living room and the bedroom, exceeding the current German air quality guideline of 125 μg/m 3 and rendered the flat uninhabitable. The symptoms of the tenant are consistent with formaldehyde poisoning and the time course of exposure.
Ostendorp G.,Landesamt Fur Soziale Dienste des Landes Schleswig Holstein |
Heinzow B.,Landesamt Fur Soziale Dienste des Landes Schleswig Holstein
Umweltmedizin in Forschung und Praxis | Year: 2014
Indoor air quality in 44 rooms in nursing homes for elderly people was assessed by measurement of volatile organic compounds. Carbon dioxide concentrations, air temperature and relative humidity were monitored continuously for at least 24 hours. Air quality was assessed by means of the TVOC concept and German indoor air guideline values (RW I and II) for single VOCs and carbon dioxide. Indoor climate was assessed by use of a comfort chart for temperature and humidity. VOC concentrations were low under normal living conditions. Alkanes, aldehydes and alcohols (Ethanol, Propanol) were dominating compounds. Target values (RW I) were exceeded 3 times, concerning C 9-C14 alkanes, C9-C15 alkyl benzenes and the sum of glycol derivatives. Intervention values (RW II) were not violated. Formaldehyde concentrations were below the guidance value of 0.1 ppm. 90% of the rooms were assigned to TVOC category 1 ("no hygienic objections"), all others to category 2 ("still no relevant health-concern"). Ventilation rates were good or sufficient in 33 rooms, resulting in CO2 concentration below 1.000 ppm for at least 50 % of the monitoring time and never exceeding 2.000 ppm. Ventilation was inadequate in 10 rooms with up to 53% of the time at more than 2.000 ppm CO2. Ventilation was worse in winter then in summer. In many rooms relative humidity was significantly below 40%, air temperature often quite high. As a result only 15 rooms matched the thermal comfort zone. For 29 rooms indoor climate was less comfortable and thus could have been perceived stressing. However, it should be considered that thermal feeling of elderly people often differs from the general population. © ecomed Medizin, Verlagsgruppe Hüthig Jehle Rehm GmbH, Landsberg.
Ostendorp G.,Landesamt fur soziale Dienste des Landes Schleswig Holstein
GWF, Wasser - Abwasser | Year: 2015
The concentration of hexavalent chromium in drinking water from 196 groundwater treatment plants in Schleswig- Holstein was analyzed. 68% of the samples showed Cr-VI concentrations below 0.02 μg/l. The highest concentration was 1.34 μg/l. The Cr-VI concentration was found to be higher if lime or related substances were used in the treatment process. Closer investigations of a plant treating oxygen rich groundwater showed that the raw water already contained 80 % of the Cr-VI found, while about 20 % of the Cr-VI derived from lime used in the process. The additional health risk arising from Cr-VI in the drinking water analyzed in this project was negligible (<1:106) or in specific cases slightly higher but still minor.