TABLE 1.
Summary Statistics of VOC Concentrations (μg/m3) Measured in New Jersey Suburban and Rural Homesa
| compound | n | no of above MDL |
MDL 1st 48 samples |
MDL 2nd 52 samples |
min | 25th percentile |
50th percentile |
75th percentile |
90th percentile |
95th percentile |
max | meanb | SD |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| acetone (2-propanone) | 100 | 94 | 12 | 12 | <12 | 21.8 | 34.5 | 55 | 91 | 190 | 2900 | 87.1 | 301 |
| benzene | 100 | 76 | 1.6 | 0.64 | <0.64 | <1.6 | 1.80 | 3.28 | 10.0 | 13.1 | 42 | 4.07 | 5.94 |
| 1,3-butadiene | 100 | 7 | 1.1 | 0.44 | <0.44 | <1.1 | <1.1 | <1.1 | <1.1 | 1.30 | 4.4 | ||
| 2-butanone (methyl ethyl ketone) | 100 | 84 | 1.5 | 1.5 | <1.5 | 1.90 | 3.50 | 5.30 | 12.1 | 21.4 | 150 | 6.87 | 15.8 |
| carbon disulfide | 100 | 3 | 1.6 | 1.6 | <1.6 | <1.6 | <1.6 | <1.6 | <1.6 | <1.6 | 4.4 | ||
| chloroform | 100 | 29 | 2.4 | 0.98 | 0.98 | 0.98 | 2.40 | 2.40 | 2.62 | 4.05 | 5.9 | 2.05 | 1.05 |
| chloromethane (methyl chloride) | 100 | 81 | 1 | 1 | <1 | 1.10 | 1.40 | 1.70 | 2.00 | 2.10 | 6.2 | 1.49 | 0.63 |
| 2-chlorotoluene (o-chlorotoluene) | 100 | 4 | 2.6 | 1 | <1 | <1 | <1.3 | <2.6 | <2.6 | <2.6 | 6.2 | ||
| cyclohexane | 100 | 48 | 1.7 | 0.69 | <0.69 | <0.80 | 1.70 | 1.93 | 4.53 | 6.92 | 52 | 2.90 | 6.40 |
| 1,2-dichlorobenzene | 100 | 1 | 3.0 | 1.2 | 16 | ||||||||
| 1,4-dichlorobenzene | 100 | 16 | 3 | 1.2 | 1.2 | 1.20 | 3.00 | 3.00 | 3.77 | 17.2 | 270 | 8.41 | 34.6 |
| dichlorodifluoromethane | 100 | 88 | 2.5 | 2.5 | 2.5 | 2.78 | 3.30 | 4.30 | 9.56 | 27.5 | 160 | 7.73 | 18.8 |
| 1,2-dichloroethane | 100 | 1 | 2 | 0.81 | 3.5 | ||||||||
| 1,2-dichloroethene (cis) | 100 | 1 | 2 | 0.79 | 2.9 | ||||||||
| 1,2-dichlorotetrafluoroethane (Freon 114) | 100 | 1 | 3.5 | 1.4 | 20 | ||||||||
| ethylbenzene | 100 | 56 | 2.2 | 0.87 | <0.87 | <1.2 | 2.20 | 2.75 | 9.64 | 12.0 | 39 | 3.72 | 5.39 |
| 4-ethyltoluene (p-ethyltoluene) | 100 | 46 | 2.5 | 0.98 | <0.98 | <1.2 | <2.5 | 2.80 | 8.40 | 11.2 | 29 | 3.70 | 4.86 |
| n-heptane | 100 | 68 | 2 | 0.82 | <0.82 | <1.9 | 2.00 | 4.60 | 9.40 | 15.1 | 49 | 4.43 | 6.14 |
| n-hexane | 100 | 75 | 1.8 | 0.7 | <0.7 | <1.8 | 2.80 | 5.08 | 16.20 | 20.2 | 270 | 8.42 | 27.5 |
| methylene chloride | 100 | 41 | 1.7 | 1.7 | <1.7 | <1.7 | <1.7 | 3.23 | 6.74 | 16.1 | 94 | 5.28 | 13.7 |
| 4-methyl-2-pentanone (MIBK) | 100 | 10 | 2 | 2 | <2.0 | <2.0 | <2.0 | <2.0 | <2.0 | 3.12 | 9.8 | ||
| methyl tert-butyl ether (MTBE) | 100 | 66 | 1.8 | 1.8 | <1.8 | <1.8 | 3.45 | 10.5 | 40.7 | 72.0 | 470 | 19.3 | 55.7 |
| styrene | 100 | 19 | 2.1 | 0.85 | <0.85 | <0.85 | <2.1 | <2.1 | <2.1 | 2.11 | 5.1 | ||
| tetrachloroethene (PCE) | 100 | 23 | 3.4 | 1.4 | <1.4 | <1.4 | <3.4 | <3.4 | 4.39 | 9.53 | 540 | ||
| toluene | 100 | 100 | 1.9 | 0.75 | 2.6 | 6.80 | 13.0 | 30.0 | 60.8 | 90.2 | 160 | 25.1 | 31.1 |
| 1,1,1-trichloroethane | 100 | 21 | 2.7 | 1.1 | <1.1 | <1.1 | <2.7 | <2.7 | 2.81 | 5.11 | 9.3 | ||
| 1,1,2-trichloro-1,2,2-trifluoroethane (Freon TF) | 100 | 2 | 3.8 | 1.5 | 2.1 | ||||||||
| trichloroethene (TCE) | 100 | 8 | 2.7 | 1.1 | <1.1 | <1.1 | <2.7 | <2.7 | <2.7 | 2.74 | 13 | ||
| trichlorofluoromethane (Freon 11) | 100 | 76 | 2.8 | 1.1 | <1.1 | 2.10 | 2.80 | 4.25 | 6.25 | 13.2 | 62 | 4.73 | 7.51 |
| 1,2,4-trimethylbenzene | 100 | 57 | 2.5 | 0.98 | <0.98 | 1.68 | 2.50 | 4.20 | 9.82 | 13.1 | 35 | 4.28 | 5.46 |
| 1,3,5-trimethylbenzene | 100 | 23 | 2.5 | 0.98 | <0.98 | <0.98 | <2.50 | <2.50 | 2.63 | 4.43 | 11 | ||
| 2,2,4-trimethylpentane | 100 | 27 | 2.3 | 0.93 | <0.93 | <0.93 | <2.3 | <2.3 | 7.00 | 11.1 | 140 | ||
| xylenes (m and p) | 100 | 83 | 2.2 | 0.87 | <0.87 | 2.48 | 3.80 | 7.80 | 30.2 | 41.1 | 91 | 10.2 | 16.2 |
| xylenes (o) | 100 | 55 | 2.2 | 0.87 | <0.87 | 1.40 | 2.20 | 2.65 | 11.1 | 13.1 | 38 | 3.92 | 5.75 |
Compounds never detected: bromodichloromethane, bromoethene, bromoform, bromomethane, carbon tetrachloride, chlorobenzene, chloromethane, 3-chloropropene, dibromochloromethane, 1,2-dibromoethane, 1,3-dichlorobenzene, 1,1-dichloroethane, 1,1-dichloroethene, t-1,2-dichloroethene, 1,2-dichloropropane, cis-1,3-dichloropropene, t-1,3-dichloropropene, 1,2-dichlorotetrafluoroethane, hexachlorobutadiene, tertiary butyl alcohol, 1,1,2,2-tetrachloroethane, 1,2,4-trichlorobenzene, 1,1,2-trichloroethane, vinyl chloride. Compounds detected in only 1, 2, or 3 samples: 1,2 dichlorobenzene, 1,2 dichloroethane, 1,2 dichloroethene (cis), 1,2-dichlorotetrafluoroethane (Freon114), carbon disulfide, 1,2,3-Trichloro-1,2,2-trifluoromethane, 2-chlorotoluene.
Mean values calculated using the MDL value.