Table 1.  Environmental tritium concentrations in samples from selected wells, 1989–90 and 1996 studies, Chicot and Evangeline aquifers near Houston, Texas

[<, less than]

Well number
or location

Sample depth
below water table
(feet)

Tritium (sample)
concentration
(tritium units)

Year
sampled

Chicot aquifer

LJ–65–02–311

4

6.5

1990

TS–60–44–610

18

5.6

1990

LJ–65–12–734

20

2.2

1990

TS–60–45–414

21

4.3

1990

TS–60–45–414

21

6.1

1996

LJ–65–06–111

23

8.3

1990

LJ–65–12–725

29

2.2

1990

LJ–60–60–111

30

2.2

1990

LJ–65–05–930

30

8.3

1990

LJ–65–13–839

32

12

1990

TS–60–53–720

35

<.2

1996

TS–60–53–316A

35

<.2

1996

TS–60–53–316B

35

<.2

1996

TS–60–53–316

35

7.1

1990

LJ–65–12–303

40

<.2

1990

LJ–60–59–403

41

<.2

1996

LJ–60–59–403

41

2.8

1990

TS–60–44–806

50

<.2

1996

LJ–65–03–620

63

6.5

1990

TS–60–45–413

74

1.1

1996

LJ–60–60–206

79

1.6

1990

LJ–60–60–206

79

1.5

1996

TS–60–63–110

80

<.6

1990

LJ–65–02–313

80

<.2

1996

TS–60–54–702

80

11

1989

LJ–60–60–206B

83

1.6

1996

LJ–60–59–326

92

2.7

1996

TS–60–45–706

108

<.2

1996

TS–60–54–806

110

<.2

1996

12250 Cutten Rd.

115

<.2

1996

19035 Doerre Rd.

125

<.2

1996

Evangeline aquifer

TS–60–37–203

5

3.4

1990

TS–60–34–301

15

<.2

1990

TS–60–37–309

35

13

1990

TS–60–34–904

50

<.2

1990

TS–60–38–704

60

2.5

1990

TS–60–35–504

63

<.8

1996

TS–60–44–214

80

<.2

1990

TS–60–46–406

85

<.2

1990

TS–60–46–406

85

<.2

1996

TS–60–35–204

90

<.6

1989

TS–60–35–503

98

<.2

1996

TS–60–45–905

98

4.5

1996

TS–60–45–114

103

<.6

1989

TS–60–42–202

134

<.6

1989

TS–66–44–805

136

<.2

1996

TS–60–35–705

150

<.2

1996

TS–60–45–513

153

<.6

1989

TS–60–45–513

153

<.2

1996

TS–60–53–315

171

<.6

1989

TS–60–53–315

171

<.2

1996

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