Table 2.

Field studies of building caulk and PCB air concentrations

Location	Type and (number of buildings)	PCB in caulk (range, ppm)	PCB in air mean/median (ng/m3)	PCB in air range (ng/m3)	Reference
Germany	School (1)	124,000 and 327,000 ppm	NRa	1,000 and greater	Burkhardt 1990
Germany	Office (1)	1,000–400,000	440/-	Nondetected to 1251	Benthe 1992
Germany	NR	2,000–60,000	NR	12–346	Balfanz 1993
Sweden	Apartments (1)	47,000 – 81,000	NR	530–610	Sundahl 1999
Germany	Schools (3)	500,000 (approx)	635, 3541, 7490/-	77 to 10,655	Gabrio 2000
Sweden	Flats/apartments (24)	0–240,000	64.6/-	0–600	Corner 2002
	Schools (3)	70–120,000 schools	NR	0–37
US	Office (1)	Nondetected-33,000	NR	< 38.2–393	Coughlan 2002
Switzerland	Masonry buildings, number NR	NR, 42% exceeded 50	790/410	Nondetected-6,000	Kohler 2005
US	School (1)	1,830 – 29,400	-/432	299 – 1,800	Macintosh 2012
Denmark	Apartments (4 sections, 1 contained PCBs)	436–718, 430	-/859	168–3843	Frederiksen 2012
US	Schools (6)	<1–440,000	-/318	<49–953	Thomas (USEPA) 2012
Denmark	Schools (126)	NR	NR	10% 100–300 12% 300–3000	Langeland 2013 (in Danish)

^anot reported