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. Author manuscript; available in PMC: 2018 Oct 25.
Published in final edited form as: Environ Sci Technol. 2015 Oct 29;49(23):13878–13888. doi: 10.1021/acs.est.5b00906

Table 2.

City of Chicago ∑PCB mass and annual emissions estimates by source sector.

Source Sector
Legacy stocks Stock of pure PCB
(tonnes)		 ∑PCB emissions
(kg year−1)
Sealants 20 2 (2–3)
Transformers 250 (120–390) 42 (4–452)
Soils (background) 2.2 (0.02–22) 64 (6–172)
Chicago CDF 1.3 26 (24 −28)
Chicago Sanitary & Ship Canal 1.2 (0.6–1.8) 8 (4–13)
Subtotal: Legacy stocks 276 (121–414) 142 (40–668)
Variable flows
Architectural Paint: In Use 2•10−5 (10−5 - 9•10−5) 3 (1–6.5)
Municipal landfills N/A 1.7 (1.3–2.3)
Human body burden 0.06 6
Sludge drying beds 0.2 50 (46–54)
Subtotal: Variable flows 0.2 61 (54–69)
Total 276 (144–418) 203 (93–736)