Data for Radon-222 and Other Radionuclides In Ground Water, Nevada, 1986-89

By Michael S. Lico

U.S. GEOLOGICAL SURVEY

Open-File Report 91-488

Prepared in cooperation with theNEVADA BUREAU OF MINES AND GEOLOGY and theNEVADA BUREAU OF CONSUMER HEALTH PROTECTION SERVICES

Carson City, Nevada 1992

U.S. DEPARTMENT OF THE INTERIOR

MANUEL LUJAN, JR., Secretary

U.S. GEOLOGICAL SURVEY

Dallas L. Peck, Director

Any use of trade, product, or firm names in this publication is fordescriptive purposes only and docs not constitute endorsement by

the U.S. Government.

For additional information Copies of this report may bewrite to: purchased from:

U.S. Geological Survey U.S. Geological SurveyRoom 227 Federal Building Books and Open-File Reports Section705 North Plaza Street Federal CenterCarson City, NV 89701 Box 25425

Denver, CO 80225

CONTENTS

Abstract ..................Introduction ................

Purpose and scope ............Methods of sample collection and analysis

Radionuclide data ..............References cited ..............

Page

11224

17

ILLUSTRATIONS

(plate is in pocket at back of report)

Plate 1. Map showing location of ground-water sites in the Carson, Truckee, and Walker River basins, northwestern Nevada, where water samples were collected and analyzed for radioactive constituents

Figure 1. Map showing location of areas in figures 2-4and plate 1 and hydrographic areas in Nevada . . .

2-4. Maps showing location of sampling sites:2. Smoke Creek Desert hydrographic area ....3. Marys Creek hydrographic area ........4. Amargosa Desert hydrographic area ......

Table 1.

2.

TABLES

Statistical summary of radon-222 activities in ground- water samples collected in Nevada, 1986-89 ......

Radionuclide analyses and other information for wells and springs sampled in parts of Nevada, 1986-89 . .

ABBREVIATED WATER-QUALITY UNITS USED IN THIS REPORT

L (liter)H.g/L (micrograms per liter){Jin (micrometer)mg/L (milligrams per liter)mL (milliliter)pCi/L (picocuries per liter)

111

DATA FOR RADON-222 AND OTHER RADIONUCLIDES IN GROUND WATER, NEVADA, 1986-89

By Michael S. Lico

ABSTRACT

The U.S. Geological Survey collected an extensive amount of radionuclide data from ground water in many parts of Nevada during 1986-89. Data presented in this report include a statistical summary of all radon-222 data in the U.S. Geological Survey NWIS data base, location and other information on the 278 wells and springs sampled, and results of chemical analyses that include radon-222 activity, gross alpha and gross beta radioactivity, radium-226 activity, and uranium concentrations. Maps are provided to show locations of sampled wells and springs.

INTRODUCTION

Radon is a naturally occurring, colorless, odorless, inert gas formed by the radioactive decay of uranium-238 (Wanty and Schoen, 1991). Uranium-238 is present in trace concentrations in all rocks, but certain types such as granitic rocks, late-stage volcanic rocks, shales, and limestones generally contain the highest concentrations (Lanctot and others, 1985, p. 68).

Radon and its decay products are radioactive and, if present at sufficient activities in air, can cause lung cancer in humans (Cothern, 1987, p. 7). Radon released to air from drinking-water sources has been estimated to cause as much as 7 percent of the 5,000 to 20,000 lung-cancer fatalities per year in the United States (Cothern and others, 1986, p. 40). Radon gas can be released from water to the atmosphere by any one of several household activities, including showering and laundering (Lowry and others, 1987, p. 363). Human exposure to radon and its radioactive decay products occurs primarily in two ways: (1) inhalation of radon gas or decay products that have adhered to small dust particles, directly affecting the lungs, and (2) ingestion of radon-containing water, increasing the net dose of radiation to the stomach and intestines (Brutsaert and others, 1981, p. 407). Potential health effects are greatest to private domestic well-water users because of the generally short time between pumping and consumption of well water. The half-life of radon is relatively short (3.82 days); thus, long storage times in supply tanks and aeration with subsequent loss of radon to the atmosphere can greatly decrease the amount of radon in the well water by the time of actual use.

-I-

Recent increases in the population of Nevada have resulted in the construction of many new private and municipal wells for domestic water supplies. Many of these new wells are constructed in areas where pre­ vious studies indicate high activities of radon may exist. However, little is known about the distribution and occurrence of radon (specifi­ cally radon-222) in ground water of Nevada and further study is needed to determine the extent of high radon activities. Otton and others (1985, p. 21) found anomalously high activities of radon (as much as 345 pCi/L) in water from springs in the Lake Tahoe basin. A study of public drinking-water supplies (Horton, 1985, p. 123) found high activities of radon in the Gardnerville (724 pCi/L), Reno (1,104 pCi/L), and Yerington (1,348 pCi/L) areas (fig.l).

Purpose and Scope

The purpose of this report is to release data collected by the U.S. Geological Survey from 1986 through 1989, in cooperation with the Nevada Bureau of Mines and Geology and the Nevada Bureau of Consumer Health Protection Services. Data included in this report are all analyses for radon-222 activity, gross alpha radioactivity, gross beta radioactivity, radium-226 activity, and uranium concentrations in ground-water samples. Most of the data are from northern Nevada, but data from three sites in the Amargosa Desert also are included. The 278 sample-collection sites are shown in figures 2 through 4 and on plate 1.

Methods of Sample Collection and Analysis

Water samples were obtained at each well by pumping or bailing until water temperature, specific conductance, and pH were constant, and a minimum of three well-bore volumes of water was extracted. Existing in-well pumps were used to sample public-supply and domestic wells. Samples were collected as near to the well as possible, and in all cases samples were taken before the water entered a pressure tank. Observation wells were sampled using a positive-displacement bladder pump or a Teflon bailer. Samples were collected from a polyethylene tube fitted to the pump discharge, or they were taken directly from the bailer.

Samples obtained from springs were collected as close as possible to the orifice using a syringe or a peristaltic pump.

Water samples for gross alpha and beta, radium, and uranium analysis were filtered through a 0.45-micrometer nitrocellulose membrane into 1-liter, acid-cleaned, polyethylene bottles and acidified to a pH of about 1 with concentrated hydrochloric acid (Thatcher and others, 1977, p. 11).

Gross alpha and beta radioactivity were determined by evaporating an aliquot of sample and counting the emitted alpha and beta radiation. The measured radiation was compared to the radiation emitted by standard materials natural uranium in the case of alpha and an equilibrium mixture of strontium-90/yttrium-90 for beta. A detailed description of this analytical method is given by Thatcher and others (1977, p. 29-32). This method is regarded as a semiquantitative measure of gross sample activity.

2

42

Reno

Carson City ^ Lake Tahoe ~39°

Gardnervi

PLATE 1

75 MILES

75 KILOMETERS

35°-*

FIGURE 1.--Location of areas shown in figures 2 through 4 and plate 1 (this report) andhydrographic areas in Nevada. Modified from Rush (1968). Names and numbers of hydrographic areas where radon samples were collected are listed in table 1.

-3-

Radium-226 activity was determined by coprecipitating radium with barium sulfate, centrifuging to collect the precipitate, dissolving the precipitate in an alkaline sodium diethylene triamine pentacetate solution, allowing time for the ingrowth of alpha-emitting daughters, and counting the alpha activity (Thatcher and others, 1977, p. 43-49).

Dissolved uranium concentration was determined by evaporating an aliquot of sample, fusing the residue with a flux of sodium fluoride, sodium carbonate, and potassium carbonate, and allowing the residue-flux mixture to dry into a small disk. If a sample contained more than 10,000 mg/L of dissolved solids, a different procedure was followed: The uranium was first purified prior to evaporation by coprecipitation on aluminum phosphate, dissolving the precipitate in dilute nitric acid, and extracting the uranium with ethyl ether in the presence of magnesium nitrate. The fluorescence of the disk under ultraviolet light was measured in a reflection-type fluorimeter (Thatcher and others, 1977, p. 83-92).

Samples for laboratory analysis of total radon activity were obtained by bottom filling a 500 mL plastic beaker and allowing several beaker volumes of water to overflow, withdrawing a 10-mL aliquot of sample with a syringe from near the bottom of the beaker, carefully injecting the aliquot beneath 10 mL of a mineral-oil-based scintillator contained in a 30-mL glass scintillation vial, and tightly capping and shaking the vial. The vials were then shipped by express mail to the U.S. Geological Survey laboratory in Arvada, Colo., for analysis by liquid-scintillation counting (Prichard and Gesell, 1977). Samples were shipped as soon as possible after collection (within 24 hours) to minimize radon decay prior to analysis.

Dissolved-radon concentrations were also measured, using a field- screening method. A 1-liter polyethylene bottle was filled with 750 mL of water and capped with a septum cap. The bottle was shaken vigorously for 30 seconds to evolve radon gas in solution, then allowed to settle for 3 minutes. A 50-mL sample of the head-space gas was removed through the septum cap with a syringe and needle. The gas sample was injected, through a septum connector, into an evacuated Lucas-type, phosphor- coated cell. The cell was inserted into an EDA-200 alpha-scintillometer and the gas activity counted for 30 minutes. The counts were converted to radon activities, in pCi/L.

Duplicate water samples were collected from each well for radon analysis. If the duplicate analyses agreed to within 5 percent, the average of the two analyses was used; if not, the larger value was used. Loss of radon gas due to aeration during pumping may be significant for samples from public-supply wells, so these analyses probably represent lower radon activities at the wellhead than in the undisturbed aquifer.

RADIONUCLIDE DATA

A statistical summary of all radon-222 analyses of ground-water samples collected by the U.S. Geological Survey in Nevada during 1986-89 is presented in table 1. This table lists statistics for radon-222 activities in the entire State as well as for selected hydrographic areas. Table 2 contains all data collected for radon-222, gross alpha and gross beta radioactivity, radium-226, and uranium, and other infor­ mation for the 278 wells and springs sampled during 1986-89.

-4-

120° 119 °45' 119 °30'

40°45' 3*

40°30' *

40°15f ~:

^ i /Sierra. Army i /(Depot I, / \n s \ / Pyramid

f Lake

15 MILES

15 KILOMETERS

EXPLANATION

-- BOUNDARY OF HYDROGRAPHIC AREASAMPLED WELL OR SPRING-Showing

site number. Value in parentheses is concentration of radon-222, in picocuries per liter (see table 2)

Well *4 Spring (690) (450)3

FIGURE 2.--Location of sampling sites in the Smoke Creek Desert hydrographic area.

-5-

116° 30' 116° 151 116° 115°45'

40° 451

BOUNDAflYbFHYOROGRAPHICAREA

FIGURE 3.-Location of spring-sampling site in the Marys Creek hydrographic area. Concentration of radon-222 was 530 picocuries per liter.

-6-

116° 45' 116° 15'

36° 45'

36° 15'

BOUNDARY OF HYDROGRAPHIC AREA

FIGURE 4.-Location of well-sampling sites in the Amargosa Desert hydrographic area. Concentrations of radon-222 at sites 275-278 ranged from 320 to 460 picocuries per liter.

-7-

TABLE 1. Statistical uooary of radon-222 aotiviti** in pround-watar aaapl**ooll*ot*d in ffevada, 1986-89

[Radon-222 activities are in picocuries per liter; "<," activity is less than the indicated value; " ," statistical parameters not computed for fewer than eight sites.)

Hydrographicarea /number (figure 1)

Smoke Creek Desert/21Marys Creek Area/52Fernley Area/76Spanish Springs V./85

Truckee Meadows /8 7Pleasant Valley/88Washoe Valley/89Lake Tahoe Basin/90

Lemmon Valley/92Carson Desert/101Churchill Valley/102Dayton Valley/103

Eagle Valley/104Carson Valley/105Antelope Valley/106Amargosa Desert /2 30

Numberof

sites

8133

1234

25

1701023

545434

Arith­metic mean

640

780

4,188

659529726

2,7801,171

Median

570

750

2,500

555470750

2,050730

Stand­ ard

devia­ tion

525

192

4,377

387294366

2,8861,764

Mini­ mum

<80530<80420

560800500

<100

640<80160190

<80<80300320

Maxi­ mum

1,700530720880

1,2004,10012,00016,000

6402,2001,0001,800

14,00014,0001,400

460

Perce

25th

252

635

720

400300430

1,200495

ntiles

75th

920

878

8,400

852852970

3,1251,100

All sites 278 1,556 766 2,388 <80 16,000 487 1,400

-8-

TABLE 2. R&dionuclidm analyses and othmr information for wmllm and springs majaplud in part* of Nevada, 1986-89

frla

p No

.:

Corresponds

to si

te number o

n plate

1 an

d in

fi

gure

s 2 th

roug

h 4.

flell

dept

h:

Tota

l de

pth

of well,

in fe

et below

land

surface

(to

conv

ert

feet to meters,

multiply by 0.

3048

); Sp,

sample site is a

spri

ng.

Use

of well:

D, domestic,

I, ir

riga

tion

, L, li

vest

ock

supp

ly,

N, industrial,

O, observation, P, pu

blic

su

pply

, an

d, U,

unused.

Lithology

of aq

uife

r:

Type of

rock or se

dime

nt in wh

ich

the

well

is co

mple

ted

or fr

om wh

ich

spri

ng issues:

Basin

fill,

undifferentiated

alluvium,

colluvium, la

cust

rine

, or

other

recent sedimentary

depo

sits

; granite, un

diff

eren

tiat

ed intrusive

igneous

rock

s; meta se

d,metampjfphosed sedimentary

rocks; volcanic,

undi

ffer

enti

ated

vo

lcan

ic rocks.

[Che

mica

l an

alys

es are

meas

ures

of

dissolved

activity or co

ncen

trat

ion

unless otherwise

noted.

All

values rounded

to three

significant

figures.

Abbr

evia

tion

s: pCi/L, picocuries pe

r li

ter;

Sr/Y-90, strontium-go/yttrium-go; jig/L, mi

crog

rams

pe

r li

ter;

"<," ac

tivi

ty or

co

ncen

trat

ion

less

th

an indicated

valu

e; " ," da

ta or

information

not

avai

labl

e.)

Map

No. 1 2 3 4 5 6 7 8 910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

Site

Local

- identification

21 N28 E2

021 N30 E19

21 N31 E2

021

N33 E2

021

N33 E2

0

21 N33 E2

221 N34 E19

21 N34 E22

52 N33 E5

276

N20 E2

5

76 N20 E25

76 N21 E25

85 N20 E2

085

N20 E21

85 N21 E2

0

87 N18 E19

87 N18 E19

87 N18 E19

87 N18 E2

087

N18 E2

0

87 N18 E2

087

N18 E2

087

N18 E2

087

N18 E2

087

N19 E19

87 N19 E2

087

N19 E2

088

N17 E1

888

N17 E19

88 N17 E2

0

89 N16 E19

89 N16 E19

89 N16 E19

89 N17 E19

90 N13 E18

19BDCD1

11DAAB1

09ADB1

11CDCA1

33AABB1

27BABD1

20CDDB1

18BBCA1

28DDC1

15BCBA1

22BCC1

34BBCC1

21ACDA1

06BBCB1

35DCCA1

24ACCA1

26ACAD1

34CDCC1

06ACCD1

07ACBB1

19AABB1

27BBCD1

30CBBC1

33DCDC1

12AABA1

08BAAD1

18BBAA1

23BCDD1

18CDAB1

07CCDC1

01DDAB1

05BABA1

11CDAB1

27DCAA1

01ACCA1

location

Latitude

40°16'54"N

40°29'14"N

40°34'48

MN40"45'06"N

40°42'21"N

40"43'15"N

40°48'41

MN40*50'20"N

40°42'40"N

39°36'10"N

39°35'07"N

39'38'51-N

39°35'12"N

39'38'01"N

39"38'15"N

39°24'46"N

39"23'56"N

39°22'31"N

39°27'18"N

39°26'36"N

39°25'06"N

39°24'04

MN39°23'42"N

39°22'36"N

39"32'03"N

39°32'19"N

39°31'27"N

39°19'21

MN39°19'59"N

39"20'52"N

39"16'35"N

39°17'11

HN39°15'36"N

39°18'16"N

39°01'12"N

Longitude

119°47'01

MW119°48'25"W

119°43'47"W

119"41'54"W

119°43'45"W

119°28'57"W

119°52'27"W

119"32'45"W

116*07' 30"W

H9«10'04"W

119°10'03"W

119°10'08

MW119°44'15"W

119°40'31"W

119°42'12"W

119"47'45"W

119°48'45"W

119°50'19"W

119°46'34

nW119«46'44"W

119°46'22

MW119°43'45

MW119°47'16

MW119°44'22"W

119°47'28"W

119°45'49"W

119°47'13"W

119°56'00"W

119°53'34"W

119°47'12"W

119°47'24

MW119°52'04

MW119°49'20"W

119°49'49"W

119°54'12

MW

Well

depth

(fee

tbelow

land

surf

ace)

__ 72 88 SpSp

_ Sp Sp 15 60 12220

605

203

760

710

236

323

645

108

831

145

490

282

660 Sp

500

151

_Sp

155

Sp

Use

of

well

U U U L U L U L P 0 0 0 P P P P P P P P P P P P P P P U U P U P D P U

Lithology

of

aquifer

Basin fi

llBasin fi

llBasin fill

Volc

anic

Volcanic

Basi

n fill

Volcanic

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basin

fill

Volc

anic

Andesite

Basin

fill

Basin

fill

Basalt

Basin

fill

Basin

fill

Granite

Basin

fill

Basin

fill

Granite

Basin

fill

_ Granite

Basin

fill

Basin

fill

Date

07-1

3-88

07-14-88

07-14-88

07-11-88

07-11-88

08-04-88

07-11-88

08-04-88

04-10-89

06-21-89

06-20-89

06-21-89

08-30-89

08-30-89

08-30-89

08-24-89

08-24-89

08-18-89

09-05-89

09-05-89

08-18-89

08-31-89

08-24-89

08-25-89

09-05-89

09-05-89

09-05-89

09-01-89

09-06-89

08-25-89

09-01-89

09-07-89

08-17-89

09-01-89

10-28-86

Gross

radioactivity

Radon-

Beta

222,

Radon-

Alpha

(pCi/L

total

222

(ng/L

as Sr

/ (pCi/L)

(pCi/L)

as U)

Y-90)

250

740

690

450

<80

1,700

260

980

530

<80

720

<80

420

880

790

820

630

660

880

870

1,200

650

1,000

830

560

570

680

800

4,100

2, 900

500

2,600

910

12,000

109

Radium-

226

(pCi

/L)

__ -- __ __

0.07 .10

_ .34

.19

__ .06 .06

.14

.10

.09

.12 __ .14 .30

.04

Uranium

(W/L

as U)

__ __

18

6.9

1.2

9.5

13

__ 4.

43.0

__ 1.7

9.6

2.1

4.2 .22

145 __ 5.3

10

ada, 1986-89 Continued

Gross

adioactivityBeta

Ipha (pCi/L Radium- Uranium ]lg/L as Sr/ 226 (jig/L

s U) Y-90) (pCi/L) as U)

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OOOOOOOOOO OOOOOO 00 00 OOOOOOOOOO 000000000. <K <K <H <H <K <*<*<*<*<» <*<*<*<*<* 0000000000

WWWWW WWW H W WWWWW WWWUW WWWWU WWWWW WWUWU WWUWW

zzzzz zzz z z zzzzz zzzzz zzzzz zzzzz zzzzz zzzzz

o\ o\ o\ o\ o\ ct\ o\ o\ o\ o\ o\ o\ o\ o\ o\ o\ o\ o\ o\ o\ ooooo ooooo ooooo ooooo

-10-

TABL

E 2.

Ra

dio

na

clid

e a

na

lyse

*

and

oth

er

info

rmati

on

fo

r w

ell

s an

d s

pri

ng

s sa

mp

led

in

part

* of

Nev

ada,

1986-8

9 C

onti

nu

ed

Site

lo

cati

on

Map

No. 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

Local

,identification

101

N18

E28

101

N18

E28

101

N18 E2

910

1 N18 E29

101

N18 E29

101

N18 E29

101

N18 E29

101

N18 E29

101

N18 E29

101

N18 E29

101

N18 E29

101

N19 E2

710

1 N19 E2

710

1 N19 E2

710

1 N19 E2

8

101

N19 E2

810

1 N19 E2

8

101 N19 E2

810

1 N19 E2

810

1 N19 E2

8

101

N19 E2

810

1 N19 E2

810

1 N19 E28

101

N19 E2

810

1 N19 E28

101

N19 E2

810

1 N19 E2

910

1 N19 E29

101

N19 E29

101

N19 E2

9

101

N19 E2

910

1 N19 E29

101

N19 E2

9

101

N19 E2

910

1 N19 E2

9

101

N19 E2

910

1 N19 E29

101

N19 E2

910

1 N19 E2

910

1 N19 E2

9

101

N19 E2

910

1 N19 E3

010

1 N19 E3

0

101

N19 E3

010

1 N19 E3

0

23ADDB1

35CDBD1

02BADA1

05CCCB1

05DDAB1

07ABAD1

18BAAD1

20AABC1

27CDAD1

28DDCD1

30BDBA1

13CCCB1

19BCB1

21ACAA1

17DAAC1

19CCCB1

21BBCA1

22DDAD1

23DCDB1

25BCDD1

27DDDA1

30ADBC1

32BAAB1

32CDAB1

34BCAA1

34CCBD1

07DAAD1

08BBBB1

08DABC1

16ACBB1

17BABD1

18DCBB1

24ABDD1

25AADA1

25ADBD1

27CDAA1

29BACB1

29CACA1

30CBAD1

30CDBC2

33CBBC1

13ACAA1

23DBCD1

27ADDA1

30BBBA1

Latitude

39°24'25"N

39°22'32"N

39°27'30"N

39°26'48"N

39°26'59"N

39°26'40"N

39°25'48"N

39°24'58"N

39°23'27"N

39°23'19"N

39°23'51"N

39°30'18"N

39°29'57"N

39°30'01"N

39°30'38"N

39°29'26"N

39°30'04"N

39°29'29"N

39°29'25"N

39°28'59"N

39°28'35"N

39°29'03"N

39°28'29"N

39°27'48"N

39°28'13"N

39°27'45"N

39°31'29"N

39°30'14

MN39°31'41"N

39°30'51"N

39031'01

MN39°30'27"N

39030'03

MN

39°29'14"N

39°29'04"N

39°28'42"N

39°29'07"N

39°28'47"N

39°28'50"N

39°28'37MN

39°28'00"N

39°30'52"N

39°29'38"N

39°29'02"N

39°29'21"N

Longitude

118°47'04

MW118°48'51-W

118°41'48

MW118°45'40MW

118°44'40"W

118°46'03"W

118°46'18"W

118°44'48

MW118°42'54"W

118°43'38"W

118°46'26"W

118°54'40"W

119°00'18"W

118°56'59"W

118°51'22MW

118°53'30"W

118°51'13"W

118°49'07"W

118°48'20MW

118°47'40"W

118°49'05"W

118°52'44

ltW118°52'00"W

118°51'57"W

118°49'53"W

118°50'06"W

118°45'46"W

118°38'41"W

118°45'11"W

118°43'58"W

118°45'18"W

118°46'15"W

118°40'20"W

118°40'06MW

118°40'13"W

118°42'54"W

118°45'37"W

118°45'18"W

118°46'34

MW118°46'29"W

118°44'32"W

118°33'35"W

118°34'53"W

118°35'32"W

118°40'00"W

Well

depth

(feet

below

land

surf

ace)

12126 82 120

129 23 144 14 14

180 24

179

100 40 14 18 36 88 30 108 26 24 13 13 13 32 63 27 300

132

100

510 14 17 96 14 67 93

484

521

540 12 17 29 21

Gross

radioactivity

Use of

Lithology

ofwe

ll

aquifer

0 D D D D D D 0 0 D D I D D 0 0 D D D D D D 0 0 0 D D D D D D I 0 D D 0 P P P P P 0 D 0 D

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basi

n fi

llBasin

fill

Basi

n fill

Basi

n fill

Basi

n fi

ll

Basin

fill

Basi

n fill

Basi

n fi

llBasin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basi

n fi

llBasin

fill

Basin

fill

Basin

fill

Basi

n fill

Basi

n fill

Basa

ltBasin

fill

Basin

fill

Basin

fill

Basin

fill

Basa

ltBasalt

Basa

ltBasalt

Basa

ltBasin

fill

Basin

fill

Basi

n fill

Basin

fill

Date

07-12-88

04-18-89

04-28-89

04-20-89

03-08-89

03-06-89

04-2

0-89

07-13-88

07-13-88

04-21-89

03-07-89

02-28-89

02-28-89

04-26-89

06-20-88

09-01-88

02-23-89

08-10-89

04-18-89

03-09-89

03-07-89

08-30-89

02-23-89

06-21-88

06-21-88

06-21-88

08-03-88

02-15-89

03-01-89

04-26-89

04-25-89

04-25-89

03-06-89

03-02-89

08-03-88

08-03-88

04-19-89

08-30-89

06-2

2-88

03-01-89

02-22-89

01-25-89

01-25-89

01-26-89

08-02-88

04-25-89

08-30-89

06-21-88

04-19-89

Radon-

222,

total

(pCi

/L)

580

320

470

<80

470

1,30

0270

250

180

340

540

760

680

1,00

0370

700

890

680

470

690

500

720

890

560

660

460

840

720

360

500

440

300

520

240

450

540

440

410

650

110

550

210

<80

120

670

650

400

720

660

Rado

n-

Alph

a 22

2 (Jig/L

(pCi/L)

__ __ _ _ _ __ _ _ _

as U)

54 2.7

54 34 90 15 30 600 28 41 5.

31.5

18 30 67 161.7

__ 49 2.6

1.9

231.4

31 17

5.7

3.0

-- 16 213.

5112.8

2.3

2.9

960 55

Beta

(pCi

/L

as Sr/

Y-90)

31 6.9

8.2

9.2

41 4.8

29420 8.

1

31 17 4.6

22 21 44 8.

64.

8

__ 27 4.0

4.7

9.9

4.0

36 5.2

4.1

7.5

19 16 8.8

2.3

8.7

8.2

8.6

890 39

Radium-

226

(pCi

/L)

__0.

04 0.03 __

0.04 .

<0.02 _ _ .18 _ _ .11

.16 _ _ .09 --

0.7

Uranium

(W/L

as U) 48 1.

2

70 3366

0 45 8.2 .50

17 31 68 5.

8<.

40

_ 43 2.3

341.

6

45.50

<.40

1.5

40 17 2.5

<.40

2.2

2.2

1.7

210 610

TABL

E 2

. X

ad

lo/i

ucl

icfo

a

na

lyse

*

and

oth

er

info

rmati

on

fo

r w

ell

t m

nd m

prin

gm

sam

ple

d i

n p

art

* of

Nev

ada,

1986-8

9 C

onti

nu

ed

to I

-

Site lo

cati

on

Map

Local

,No.

identification

126

101

N19

127

101

N20

128

101

N20

129

1Q1

N20

130

101

N20

131

102

N17

132

102

N17

133

102

N17

134

102

N17

135

102

N18

136

102

N18

137

102

N18

138

102

N18

139

102

N18

140

102

N18

141

103

N15

142

103 N15

143

103

N15

144

103

N16

145

103 N16

146

103

N16

147

103

N16

148

103

N16

149

103 N16

150

103

N16

151

103

N16

152

103

N16

153

103

N16

154

103

N17

155

103

N17

156

103 N17

157

103 N17

158

103

N17

159

103

N17

160

103

N17

161

103

N17

162

103 N17

163

103

N18

164

104

N14

165

104

N14

E30

31BBAD1

E29 22CBAC1

E29 34BBAC1

E31

04CADD1

E31

15BABB1

E24

03ABAD1

E25 18DDD1

E25 29ADAB1

E25 32BAAA1

E24

15CCBA1

E24

25AADC1

E24

28CDBD1

E24

33BDAA1

E24

35ABAD1

E25 17CCBC1

E20

14CAAA1

E20

22ABCA1

E21

29BAAC1

E20

01ADAC1

E21 12ADAB1

E21

14ACAD1

E21

15CCDC1

E21

23DBAA1

E21

26BCAB1

E21

29DCDD1

E22

06CDDD1

E22

09BCBC1

E22

09CACA1

E22

20DABB1

E22

27DACC1

E22

30DABC1

E22

32DDBC1

E23

02BC1

E23

10BCCA1

E23

17DCBC1

E23 36BADC1

E24

34DDAC1

E23 35DCDC1

El 9 12ADAB1

E20 06CBAB2

Latitude

39*28'22"N

39e35'06

MN39

e33'41"N

39e37'19"N

39e36'24"N

39e22'26"N

39°19'52"N

39e18'47"N

39e18'08

MN

39e25'18"N

39e24'03MN

39e23'30"N

39e23'll"N

39°23'20"N

39e25'15

MN

39e09'49"N

39e09'17"N

39e08'30"N

39e17'00"N

39'16'10"N

39e15'26"N

39e14'41

MN39

e14'17"N

39'13'08-N

39e12'59"N

39e16'27"N

39e16'05MN

39e15'38"N

39e19'36"N

39e18'23"N

39e18'37"N

39e17'23

MN39e21'44"N

39-21'15"N

39e20'07"N

39e17'58"N

39e17'28"N

39e22'35"N

39e05'42"N

39e06'23

MN

Longitude

118'

39'5

4-W

118°43'22

MW118°43'16

MW11

8°30

'33-

W118*29'41

MW

119°

16'2

1"W

119°12'40

MW11

9*11

'38"

W119°12'07-W

119°17'04"W

119°13'51

MW119'17'54

MW119'17'45

MW119'15'09

MW119'12'37-W

119'

42'1

5"W

119'43'07-W

119

e38'55

MW119'40'57-W

119'33'59-W

119'35'18-W

119'

37'0

1-W

119'

35'1

8MW

119"35'52

MW119"38'42

MW

119°

33'2

1MW

119°31'34

MW119

e31'13

MW119°31'51

MW119e2

9'34

MW

119e3

3'05

MW119e31'50

MW119e22'34

MW119e23'39

MW119e25'

35MW

119e21'10

MW119e16'

06MW

119e21'56

MW119e47'20

MW119e47'

05MW

Well

depth

(feet

below

land

surface)

11 12294 14 12

360

150 13 17 400

400

282

230

196

145

500 15 Sp Sp 18 130

128

180

102 82 120 68

133

280

132

200 96 305

200

150

389

110

268

155 96

Gross

radioactivity

Use of

well O O D O O D D O O D P D D D P P O U U O P D P P D I O D D D D D P 0 D I P P D D

Lithology

ofaq

uife

r

Basi

n fill

Basi

n fill

Basalt

Basin

fill

Basi

n fill

Met a

sed

Basi

n fill

Basin

fill

Basin

fill

Basi

n fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basi

n fi

llBa

sin

fill

Basin

fill

Ande

site

Basi

n fill

Volc

anic

Volcanic

Basin

fill

Basi

n fi

llBasin

fill

Basin

fill

Basi

n fill

Basin

fill

Basin

fill

Basi

n fill

Basin

fill

Basi

n fill

Basin

fill

Basi

n fill

Basin

fill

Basi

n fill

Basin

fill

Basi

n fill

Basi

n fill

Basin

fill

Date

06-22-88

06-22-88

08-02-88

03-09-89

06-15-89

06-15-89

09-2

1-89

09-25-89

07-26-88

07-26-88

07-26-88

09-30-89

01-13-89

09-21-89

09-26-89

09-26-89

02-01-89

06-08-88

08-30-88

06-02-89

06-07-89

06-23-88

12-01-88

02-24-89

12-01-88

05-02-89

09-19-89

12-08-88

06-23-88

11-29-88

09-27-89

09-20-89

09-27-89

01-31-89

12-05-88

02-01-89

01-10-89

10-02-89

01-24-89

01-11-89

08-27-87

08-27-87

Radon-

222,

tota

l(p

Ci/L

)

380

360

490

2,200

490

550

180

580

480

390

340

160

890

340

460

840

1,00

0

360

1,100

970

250

310

1,20

01,800

1,00

0690

970

580

190

320

620

750

750

770

750

960

480

430

810

630

Rado

n-

Alpha

222

(Jlg/L

(pCi

/L)

as U)

190

180

430 6.

2

_

_

__1.4

36 24

2.2

5.0

3.9

2.5

2.

3

6.7

31

--

2.2

2.6

6.3

-,

-.-. 2.5

3.3

6.3

2.6

__

_ 271.

6460

1,20

0

Beta

(pCi

/Las

Sr/

Y-90)

230

250

210 16 __ _4.7

20 20

8.6

18 3.8

2.9

3.

0

9.5

21 ~

4.2

14 13 5.

45.2

10 6.7

_9.3

4.2

Radi

um-

Uranium

226

(Jlg

/L(pCi/L)

as U)

160

45

0.70

8.3

_

____

__

.70

28

2.1

4.

0

2.7

1.5

0.04

1.2

1.1

4.1

23

1.5

1.6

6.8

_

_<.

401.

93.

71.

6

_

__8.8

1.0

TABL

E 2. ft

ad

ioji

ucli

d*

aji

aly

«««

mnd

oth

*r

info

rmati

on

fo

r tr

«ll

«

and

mpr

ingm

«a

jqp

l«d

in

part

* of

Nev

ada,

1986-8

9 C

onti

nu

ed

CO I

Site location

Map

No.

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

Local

,identification

104

N15 E19

104

N15 E1

910

4 N15 E19

104

N15 E19

104

N15 E1

9

104

N15 E1

910

4 N15 E19

104

N15 E1

910

4 N15 E2

010

4 N15 E20

104

N15 E2

010

4 N15 E2

010

4 N15 E2

0

104

N15 E2

010

4 N15 E20

104

N15 E20

104

N15 E2

010

4 N15 E2

010

4 N15 E2

010

4 N15 E2

0

104

N15 E20

104

N15 E20

104

N15 E2

010

4 N15 E2

010

4 N15 E2

0

104

N15 E20

104

N15 E2

010

4 N15 E2

010

4 N15 E2

010

4 N15 E2

0

104

N15 E2

010

4 N15 E2

010

4 N15 E20

104

N15 E2

010

4 N15 E2

0

104

N15 E2

0

104

N15 E2

010

4 N15 E2

010

4 N15 E2

0

104

N15 E20

02DDDC1

12CDBD1

12DADD2

13CDBB1

23CCBB1

2 8 AD AD 1

33DDDD1

35BDAA1

01CCBC1

03CCCB1

05ABDA1

06DAAC2

06DDAC1

07CACB1

07DAAC1

07DDBB1

08BAC1

08BDBB1

09DACC1

09DBD1

10ADDA2

10BDDA1

16BBBB1

16BCBC1

17AADA1

17AADC1

17AADC4

17AADC5

17ABD1

17BACC1

17CABA1

17CABA2

17CABA3

17CABA4

17CAD1

17DBBD1

17DDDA1

18ACAA1

18DCA1

20BBDD1

Lati

tude

39°11'13"N

39°10'17"N

39*10'35"N

39°09'38"N

39*08' 46"N

39°08'14"N

39*06' 47"N

39°07'20"N

39°11'08"N

39ell'23

MN

39°12'04"N

39*11'33"N

39°11'20"N

39°10'36"N

39°10'37"N

39*10'31"N

39°10'07"N

39°11'04"N

39*10'39"N

39*10'39"N

39°10'58"N

39*10'53"N

39*10'05"N

39*09'43"N

39°10'10

MN

39*10'14"N

39*10'08"N

39*10' 08"N

39°10'10MN

39°10'13"N

39*09'57"N

39*09'57"N

39*09'57"N

39*09'57"N

39*09'43"N

39*09' 50"N

39*09'33"N

39°10'05MN

39*09'45"N

39*09'15"N

Longitude

119°48'19MW

119*47'55-W

119°47'15"W

119*48'00MW

119*49'17"W

119°50'36"W

119*50'05"W

119°49'11"W

119*42'07"W

119*43'53MW

119

e45'

14BW

119

e46'17"W

119°46'17

MW

119°47'00

MW119

e46'15

BW

119*46'23"W

119*46'53"W

119

e45'48"W

119044'02

BW119°44'30

BW

119°42'46"W

119*43'25"W

119*45'00"W

119*45'00"W

119*45'04"W

119°45'07"W

119*45'06"W

119*45'06"W

119°45'21"W

119*45' 50"W

119*

45' 48"W

119*45'48"W

119*45'48"W

119*45'48"W

119*45'38"W

119*45'29"W

119*45'06"W

119*46'57"W

119*46'28"W

119*45'55"W

Well

depth

(feet

below

land

surface)

250

195

470

250 Sp Sp

290 Sp

455 69

120

455 18 92 21

470 30

227 96 11

1,250 18 21 30

300

700 29 58 19 19 35 30 25 20 21 820

604 21 20 16

Gross

radioactivity

Use

of

Lith

olog

y of

well

aquifer

P D P D L U P L P D D P 0 D 0 P 0 P D 0 P 0 0 0 P P P P 0 0 0 0 0 0 0 P P 0 0 0

Granite

Basin

fill

Basi

n fill

Granite

Allu

vium

Granite

Granite

Allu

vium

Granite

Basin

fill

Basi

n fill

Basi

n fill

Basin

fill

Basin

fill

Granite

Basi

n fill

Basin

fill

Basin

fill

Basin

fill

Granite

Basi

n fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basi

n fill

Basin

fill

Basi

n fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Date

09-07-88

09-07-88

09-01-87

08-27-87

05-11-88

09-08-88

06-02-89

05-31-89

08-11-88

06-01-89

08-24-88

08-30-88

08-17-88

05-25-88

03-09-89

06-02-89

09-04-87

03-10-89

08-27-87

05-11-88

02-27-89

09-02-88

09-20-88

01-20-89

08-24-88

03-07-89

06-02-89

02-24-89

03-10-89

09-09-87

07-12-89

09-03-87

09-02-87

05-31-89

01-12-89

03-03-89

03-03-89

03-03-89

03-06-89

02-28-89

09-10-87

05-13-88

09-08-88

03-08-89

02-27-89

06-02-89

02-24-89

Radon-

222,

total

(pCi/L)

14,000

14,000

4,300

4,400

4,900

3,600

14,000

<80

2,300

220

2,600

1,900

2,000

2,400

2,300

1,200

3,10

04,100

2,500

4,000

11,000

2,800

2,100

1,100

630

660

590

2,400

1,500

1,500

1,500

3,200

1,400

5,100

3,200

2,700

2,400

2,700

2,600

1,800

2,400

2,600

1,700

1,500

6,800

5,100

1,100

Radon-

Alpha

222

(jlg

/L(p

Ci/L

) as

U)

41 44

_ 123.

5

__1.8

_5.

452

3.5

19

__

__

_ _

__ 13

_ 38 21

1.1

__

_

__

__

_

_

__

__

__

_

_

__ 161.

1

_

_

Beta

(pCi

/L

as Sr

/Y-90)

21 21 _8.1

3.6

__1.8

_3.8

28

2.3

9.9

_ _ ~ __ 11 _ 197.8

~

5.9

_ _ __ -- ___ __ _ ~ _ _ _ -- __8.9

1.9

_

Radium-

226

(pCi

/L)

__ _ _ __ _

0.15 __ __ _ __ _ ___ ~ _ _ _ _ _ _ ~ ___ __ ~ ___ ~ __ __

Uranium

(Jtg

/Las

U)

39 _ _ _ 131.6

29

1.2

2.7

56

2.2

25 ___ _ 19 37 12

.5 _ _ _ ~ __

__ _ _ ~ ___ _ _ 191.

1 _

TABL

E 2. R

adlo

nu

c2id

« a

n*

ly*

»f

and

oth

mr

info

rma

tio

n fo

r w

mllm

m

nd m

prin

gm

*a

op

l»d

in

pa

rt*

of

, 1

98

6-8

9 C

onti

nu

ed

>£> I

Site location

Map

No.

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

Local

7identification

104 N15 E2

0 20CACC1

104

N15 E2

0 20DBBD1

104

N15 E2

0 21BACC1

104

N15 E2

0 21CABA1

104

N15 E20 28CCBD1

104

N15 E2

0 29BBDB1

104

N15 E2

0 29BCAC1

104

N15 E2

0 31BABA1

104

N15 E2

0 31DCC1

104

N15 E2

0 32BBDA1

104

N16 E1

9 36DAAC1

104

N16 E2

0 31ACCB1

105

Nil E2

0 06BDA1

105

Nil E21

35ABB1

105

N12 E1

9 10DCCA1

105

N12 E1

9 13BAAB1

105

N12 E1

9 15DBAA1

105

N12 E1

9 23DDD1

105

N12 E19

24CCAA1

105

N12 E1

9 36DADA2

105

N12 E2

0 04ADA1

105

N12 E2

0 04BAB1

105

N12 E2

0 06ADDD1

105

N12 E2

0 06

DB1

105

N12 E2

0 09BCAD1

105

N12 E2

0 11ADD1

105

N12 E2

0 15ADD1

105

N12 E2

0 16CCD1

105

N12 E2

0 17CCD1

105

N12 E2

0 20ABAA1

105

N12 E2

0 24ADCC2

105

N12 E2

0 32DBBD1

105

N12 E21

18CAB1

105 N13 E1

9 02AD1

105 N13 El

9 09ADCA1

Latitude

39°08'52"N

39°08'55"N

39e09'15"N

39°08'57"N

39°07'51"N

39°08'02"N

39°08'03"N

39°07'43"N

39°06'55"N

39°07'33"N

39°12'24"N

39°12'34"N

38°50'49"N

38°46'45"N

38°54'41"N

38°55'22"N

38°54'10"N

38°52'55"N

38°53'03"N

38°51'22"N

38°56'04"N

38°56'21"N

38e55'54"N

38°55'46"N

38*55'12"N

38°55'09"N

38°54'14"N

38°53'45"N

38°53'52"N

38°53'42"N

38°53'21"N

38°51'25"N

38°54'12"N

39°01'10"N

39°00'21"N

Longitude

119*45'46"W

119°45'29"W

119°44'46"W

119°44'34"W

119°44'54"W

119°46'17"W

119°45'42"W

119°46'31"W

119°46'31"W

119°45'55"W

119°47'21"W

119°46'40"W

119°46'45"W

119°35'33"W

119°49'55"W

119°48'13"W

119°49'45"W

119°48'23"W

119°48'02"W

119°47'15"W

119°43'56"W

119'44'45"W

119°46'14"W

119°46'37"W

119*44'48"W

119°41'48"W

119e42'54"W

119°44'51"W

119°45'54"W

119°45'17"W

119°40'50"W

119°45'28"W

119°40'14"W

119°48'30"W

119°50'43"W

Well

depth

(feet

below

land

surf

ace)

100 14 18 68

152

120

560

344

160

590 91

289 70 115

107 27

300

141

132 17

300

300

460

120

350

125

375

176 91

450

145 15 500

180

Gross

radioactivity

Radon-

Use

ofwell

D O O D D P P D P P P D D D D O P D D O P P I D I D P N D P D O N I D

Lithology

of

aquifer

Basi

n fill

Basin

fill

Basin

fill

Basi

n fill

Basi

n fill

Basin

fill

Basin

fill

Granite

Basin

fill

Basin

fill

Granite

Basin

fill

Basin

fill

Basin

fill

Granite

Basi

n fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basin

fill

Basi

n fill

Basin

fill

Basin

fill

Basi

n fill

Basin

fill

Basi

n fill

Basin

fill

Basin

fill

Basin

fill

Basi

n fill

Basi

n fill

Basin

fill

Date

08-1

8-88

02-28-89

05-31-89

03-07-89

05-31-89

08-26-88

08-19-88

08-16-88

05-24-88

05-24-88

08-11-88

08-15-88

05-24-88

08-12-88

08-15-88

07-28-88

08-20-87

05-04-88

08-23-88

07-07-87

08-20-87

08-20-87

08-12-86

07-07-87

08-20-87

08-20-87

08-20-87

06-16-88

07-11-88

07-06-87

08-23-88

08-23-88

07-21-88

07-25-88

05-04-88

07-14-88

08-20-87

08-24-87

07-21-88

08-10-88

08-24-87

07-07-87

08-24-87

07-07-88

07-07-88

07-30-86

07-07-87

09-20-88

08-18-86

08-27-87

222,

total

(pCi/L)

1,300

1,400

1,100

1,000

700

1,300

690

830

1,200

1,200

930

2,300

1,100

2,500

7,100

3,200

7,100

550

5,600

700

840 940

860

1,200

1,300

760

1,100

_ 1,400

1,500

_1,800

1,70

0 70

0

Radon-

222

(pCi/L)

__ _ __

220 _

3,600

10,100

7,200

5,020

3,610

5,500

2,700

480 440

530

800

763

<100 601

593

704

380

Alph

a (H

g/L

as U)

3.1

144.5

1.4

2.7

2.9

6.6

4.3

2.7

42 184.

0 2.

2

5.3

.8

1.4

_4.

94.9

7.2

1.1

2.0

<.4

_ .6

7.9

__ 1.

71.

8 1.

6

Beta

(pCi

/L

as Sr/

Y-90)

3.6

__ _5.6

2.6

1.3

2.1

2.4

3.1

3.6

2.5

18 174.8

2.7

5.0

__ 1.5

14 __5.0

5.5

4.2

2.9

3.6

2.0

__ 2.0

5.5

__ 2.

22.3

2.

7

Radium-

226

(pCi/L)

_ ___ __ __ _ __ __

0.56_ _ _ _ _ __ __ __ __ .06_ .09

Uranium

(Hg/

Las U)

1.2

_ _ __ 8.5

2.8 .6

2.7

_ 5.9

2.8

3.2

38 14 _.8

5.5

_ _ _ _ _ 3.6

<.4

_ 3.2

5.7 .80

1.5 .50

__ .5

06.

1_ __.5

0 _ <.40

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We

Site location de

(f be

Map Local . la

No. identification Latitude Longitude sur

it. 3 M 16 TJ 1- Oi a 0 fl> r^ M8 *rt:r

* a CD O 10Mill 161

0, £>a <f

Grossradioactivity

Radon- Beta

lology 222, Radon- Alpha (pCi/L Radium- Uranium >f total 222 Oig/L as Sr/ 226 (|ig/L

lifer Date (pCi/L) (pCi/L) as U) Y-90) (pCi/L) as U)

TABLE 2. Radionaclide analyses and other information for wells and springs sampled in parts of Nevada, 1986" -Continued

TABLE 2. Padionuclid* analy««« and other information for tr

ail*

and spring* «aapl«d in part* of Navada, 1986-89 Continued

Map

No.

271

272

273

274

275

276

277

278

Site

location

Loca

l -

identification

105

N15

E20

106

N10

E22

106

N10

E22

106

N10

E22

230

S13

E47

230

S13

E47

230

S13

E47

230

S13

E47

33CC

DD1

15DC

B1

29CADA1

32BAAB2

26DC

CB1

35ACBA1

35BA

D135BDBA1

Latitude

39e06'53"N

38°43'33

HN

38e41'56-N

38e41'

36"N

36e46'15

HN36°45'57"N

36e45'57-N

36e45'56

HN

Longitude

119e44'

43"W

119e3

0'17

"W

119e32'

33"W

119e32'39

HW

116e4

1'24

HW116e41'

18"W

116e4

1'30

HW116e41'

35"W

Well

depth

(feet

belo

wland

surface)

235 183

105

307

326

575

404

Use of

well P P D D O O O O

Lith

olog

yof

aquifer

Gran

ite

Basi

n fill

Basin

fill

Basi

n fill

Basi

n fill

Basi

n fill

Basi

n fill

Date

08-0

1-88

08-04-86

08-1

9-87

08-1

9-87

08-18-87

08-01-86

08-1

9-87

08-19-87

08-15-89

08-1

7-89

08-1

4-89

08-17-89

Radon-

222,

tota

l(p

Ci/L

)

1,700 __ 430

320

410

460

Gros

s ra

dioa

ctiv

ity

Beta

Radon-

Alph

a (p

Ci/L

222

(Jig/L

as Sr

/(pCi/L)

as U)

Y-90

)

3.0

2.5

339

480

301

1 410

836

.1450

365

Radi

um-

Uranium

226

(ng/

L(pCi/L)

as U)

2.5

0.06

_

_

The

local

site

-ide

ntif

icat

ion

system used in this report is based on an index

of hy

drog

raph

ic ar

eas

in Nevada (R

ush,

19

68)

and

the

rectangular

subdivision

of th

e public lands

referenced to the

Mount

Diablo ba

se line and meridian.

Each si

te designation

consists of

fo

ur un

its:

Th

e first

unit is

th

e hydrographic ar

ea nu

mber

. The

second unit is the

township,

preceded by

an N

or S to

indicate lo

cati

on

nort

h or south of t

he base line.

The

third

unit is the

rang

e, preceded by

an E to

in

dica

te location ea

st of th

e meridian.

The

four

th

unit

consists of

th

e section

number and

letters

desi

gnat

ing

the

quarter

sect

ion,

quarter-quarter

sect

ion,

and

so on

(A,

B, C,

and

D indicate th

e northeast, northwest, southwest, and

southeast

quarters,

resp

ecti

vely

), followed by

a

number in

dica

ting

th

e sequence in

whic

h th

e si

te was

reco

rded

. Fo

r ex

ampl

e, si

te 105

N12

E20

04ADA1 is in Carson Va

lley

(hydrographic

area

10

5).

It is

the

first

site

re

cord

ed in

the

northeast

quar

ter

of the

southeast

quar

ter

of the

northeast

quarter

of section

4, To

wnsh

ip 12 No

rth,

Range

20 Ea

st,

Mount

Diablo base li

ne and

meri

dian

.

REFERENCES CITED

Brutsaert, W.F., Norton, S.A., Hess, C.T., and Williams, J.S., 1981, Geologic and hydrologic factors controlling radon-222 in ground water in Maine: Ground Water, v. 19, no. 4, p. 407-417.

Cothern, C.R., 1987, Development of regulations for radionuclides indrinking water, in Graves, Barbara, ed., Radon, radium, and other radioactivity in ground water: Chelsea, Mien., Lewis Publishers, p. 1-11.

Cothern, C.R., Lappenbusch, W.L., and Michel, Jacqueline, 1986,Drinking-water contribution to natural background radiation: Health Physics, v. 50, p. 33-47.

Horton, T.R., 1985, Nationwide occurrence of radon and other natural radioactivity in public water supplies: U.S. Environmental Protection Agency report 520/5-85-008, 208 p.

Lanctot, E.M., Tolman, A.L., and Loiselle, Marc, 1985, Hydrogeochemistry of radon in ground water: Eastern Regional Ground Water Conference, Association of Ground Water Scientists and Engineers, National Water Well Association, Portland, Maine, July 1985, Proceedings, p. 66-85.

Lowry, J.D., Hoxie, D.C., and Moreau, Eugene, 1987, Extreme levels of Rn and U in a private water supply, in Graves, Barbara, ed., Radon, radium, and other radioactivity in ground water: Chelsea, Mich., Lewis Publishers, p. 363-375.

Otton, J.K., Zielinski, R.A., and Been, J.M., 1985, Uranium inHolocene valley-fill sediments, and uranium, radon, and helium in waters, Lake Tahoe-Carson Range area, Nevada and California: U.S. Geological Survey Open-File Report 85-389, 30 p.

Prichard, H.M., and Gesell, T.F., 1977, Rapid measurements of Rnconcentrations in water with a commercial liquid scintillation counter: Health Physics, v. 33, p. 577-581.

Rush, F.E., 1968, Index of hydrographic areas in Nevada: Nevada Division of Water Resources, Information Report 6, 38 p.

Thatcher, L.L., Janzer, V.J., and Edwards, K.W., 1977, Methods for determination of radioactive substances in water and fluvial sediments: U.S. Geological Survey Techniques of Water-Resources Investigations, Book 5, Chapter A5, 95 p.

Wanty, R.B., and Schoen, Robert, 1991, A review of the chemicalprocesses affecting the mobility of radionuclides in natural waters, with applications, in Gundersen, L.C.S., and Wanty, R.B., eds., Field studies of radon in rocks, soils, and water: U.S. Geological Survey Bulletin 1971, p. 183-194.

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