Encyclopedia of Environmental Science and Engineering, Volume I and II

RADON 1055

generally prevail in New Jersey homes. In accordance with

the EPA protocols, the canisters were placed in the level of

the home closed to the underlying soil. Unless individuals

live at the same level as the tests were made, this testing

method tends to overestimate the average concentrations

actually breathed by residents by a factor of about two.

Most participants in the study lived one floor in the home

above the testing level. An exception to the two fold reduc-

tion in radon concentration with a one floor increase in dis-

tance from the underlying soil occurs in homes with forced

air heat. Openings in duct work in the basement make pos-

sible the circulation of basement air throughout the home.

RADON LEVELS IN WATER

(PCI/L)

0

10

20

30

40

50

FREQUENCY %

TOTAL WELLS = 872

<100 100–

1,000

1,000-

5,000

5,000-

10,000

10,000-

50,000

50,000-

100,000

>100,000

1.6 0.3

11.5

9.2

47.6

27.0

2.9

FIGURE 5 Radon in domestic well water obtained in the confirmatory monitoring program.

TABLE 4

Radon cluster identification program data distribution

Location 
4 pCi/1 4–19pCi/1 20–199 pCi/1 200 pCi/1 N

Clinton 4 20 54 41 119

Montgomery 5 6 3 1 15

Ewing 1 8 22 18 1 49

Ewing 2 10 8 10 3 31

Princeton 12 22 12 1 47

Bethlehem 16 26 16 7 65

Bernardsville 6 20 17 4 47

Mansfield 5 10 25 3 43

Hampton 0 5 7 2 14

TOTALS 66 138 162 63 429

% OF TOTALS 15.3 32.3 37.7 14.7 100

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