Inventory & analysis of abandoned Navajo dipping vats ...

SFUND RECORDS CTR

88222115

SFUND RECORDS CTR

4829-00001

tAKE POKM

IN REPLY REFER TO:

TS&RP-301

United States Department ot The Interior" anbBca1

BUREAU OF INDIAN AFEAIRS Navajo Area office DAnno

Post Off ice. Box 106'o AiwvJU<c

Gallup, New Mexico .87305-1060'

MAR 2 ^ 1993

Director

U.S. Environmental Protection Agency Region 9

75 Hawthrone Street San Franciso. CA 94105

Dear Sir:

Enclosed is a rniciosed is a copy of the Inventory and Analysis of Abandoned ava-jo Dippinc Vats Potentially Contaminated by Toxaphene/Lindane

lepoit-for your information.

Snouia you need additional copy or., information. please contact Natural. Resources Office at ( 602) .871-5151. extension 5351.

Sincerely,

ACTING Area Director, Navajo

INVENTORY AND ANALYSIS OF ABANDONED NAVAJO DIPPING VATS POTENTIALLY CONTAMINATED

BY TOXAPHENE/LINDANE

February, 1993

Prepared by: AREA NATURAL RESOURCES

BRANCH OF TECHNICAL SERVICES & RESOURCE PROTECTION NAVAJO AREA, BUREAU OF INDIAN AFFAIRS, WINDOW ROCK, AZ.

FOREWORD \

In February, 1987, this office, in coordination with Navajo Area Environmental Quality Office and Navajo Nation Department of Agriculture, petitioned the Navajo Nation Central Grazing Committee to close all active dipping vats on the Reservation and to ban the use of toxaphene as a pesticide. This action was based on the known toxicological effects on humans and a concern that disposal methods may have contaminated contiguous soils and water sources. The Central Grazing Committee, after consideration, resolved unanimously to ban toxaphene use. Subsequently, many Navajo Chapters moved to close local dipping vats although some clandestine use in remote areas is believed to have continued until 1989.

During 1988-90, an analytical study of toxaphene contamination of soils and waters near dipping vats was undertaken by Dr. Christine J. Bennally,of Colorado State University. Interim reports were published during this period and the substance of her study became the subject of her doctoral dissertation, published in 1990. BIA-Navajo Area provided logistical and technical assistance to her work, which confirmed that serious contamination existed at specified locations.

The Navajo Nation Pesticide Regulatory Program formally requested technical assistance from BIA-Navajo Area in 1990. At that time, 136 sites were listed as potentially contaminated locations. The inventory and laboratory analysis of those sites was completed in early 1993 through the combined efforts of the Bureau and the Navajo Superfund Office. The results of the inventory are contained in this report.

David A. Koehler, Ph.D.'

Robert D. Schultz

ACKNOWLEDGEMENTS

tWs fi tefX% Ta'lSbUti0nS 0f 11,6 f0ll0Win«individuals to™d «» completion of

Kendall Olsen Vincent Tom Michelle Kedelty Gene Peters Leroy Yellowhair Vida C. Begay Rose Damon Beverly Sanders Robert Schultz Rex Morris Christine Benally Charles Nixon Nelson Roanhorse

££££2" T°m ^ °f «» N^° »d ce

ii

TABLE OF CONTENTS

FOREWORD i

ACKNOWLEDGEMENTS ii

TABLE OF CONTENTS iii

LIST OF TABLES . iv

LIST OF APPENDICES v

I. INTRODUCTION x

II. CHEMICAL/PHYSICAL PROPERTIES AND FATE OF TOXAPHENE AND LINDANE 2

III. METHODS AND MATERIALS 4

IV. RESULTS 7

V. REMEDIATION OPTIONS 8

VI. SUMMARY 10

VII. LITERATURE CITED 36

IX. APPENDIX 37

iii

LIST OF TART ire

TABLE 1. List of Known Dipping Vat Locations 12

TAKM2- .1'' • „

TABLE 3. Concentration o£ Toxaphene in Water Samples .......... 24

TABLE 4. Concentration of Lindane in Soil samples 27

TABLES, concentration of Lindane in Water Samples 33

TABLE 6. Dipping Vat sites Not Found 33

iv

LIST OF APPENDICES

A.l Laboratory Analyses Sheets for Sites Exceeding EPA Standard.

A'2 6t* .al: i983, Methods for the Determination of Oraanir Substances in Water and Flurial Sediments.

A*3 T-*W^ 19?8, Methods for the n^termination of Or-rranin Compounds in Drinking Water. H

A.4 Concentration of Toxaphene in Soil Samples.

v

T. INTRODUCTION

The practice of sheep dipping was popularized on Navajo Area in the late 1940's and 1950's.

Pesticides that eliminated wool maggots and other ectoparasites of sheep were marketed in that

period and their use was widely endorsed by Agricultural Specialists from tribal, state and

federal agencies. Since toxaphene and lindane demonstrably enhanced the quality and quantity

of wool yields, local Navajo chapters quickly adopted their use and constructed dipping vat

facilities to implement treatment.

The preferred treatment involved immersing the animals in a trough containing a heated or

unheated solution of water and pesticide. The pesticide toxaphene is a polychlorinated

camphene with carcinogenic, mutative and other toxic qualities, although such hazards were not

known or recognized during the primary period of use. Oral histories contain accounts of

people entering the troughs to expedite animal treatment and to ensure complete submersion of

livestock. Dogs were also thrown in to remove fleas and ticks. Annually scheduled sheep

dipping events became popular as social occasions and opportunities to visit. BIA personnel

utilized those occasions to perform livestock counts and permit compliance checks.

The use of livestock dipping vats diminished in the 1980' s as easier methodologies became

accessible. The availability of pour-on, injectable and other systemic insecticides contributed to

the obsolescence of vats. The actual discontinuation of use, however, did not occur until after

the 1987 Tribal ban.

When the Navajo Tribe requested assistance to inventory and analyze potentially

contaminated sites in 1990, it assembled a list of known sites for use by BIA-Navajo Area. The

list contained 136 locations. Those locations are indicated in Table 1. All of those locations

1

have been processed and are reported in this manuscript. During the conduct of our inventory,

however, additional sites were reported to us by agency personnel and local residents. There

may be as many as 100 additional sites. In general, these vats were abandoned many years ago

and were not used as extensively as the listed sites. However, the present status of these sites is

unknown and some may contain levels of considerable contamination.

n. Chemical/Physical Properties and Probable Fate of Toxaphene and Lindane

Toxaphene is a mixture of at least 175 components produced by the chlorination of

camphene. It has had wide use in agricultural applications as an insecticide for cotton and other

crops and as a pesticide for farm animals. It is environmentally persistent because it adsorbs

strongly to soil particles and in water does not readily hydrolyze, photolyze or biodegrade. It is

known to bioacculate easily in aquatic and terrestrial food chains and can dramatically increase

the potential for carinogenesis, teratogenesis and mutation in a variety of life forms. Humans

exposed to toxaphene have done so primarily through food or occupational contacts.

Versar, Inc. (1979) describes the probable fate of toxaphene in water-related environments as

follows:

An inclusive assessment of the fate of the pesticide toxaphene in aquatic environments is

complicated because toxaphene is a complex mixture of polychlorinated camphene derivatives of

different physical properties and environmental behavior. Toxaphene is very stable to biological

and chemical processes in aerobic environmental systems, but it does undergo partial reduction

floss of chloride content) in anaerobic environments. A dominant process in aquatic

environments is direct sorption on sediments or sorption onto particulates followed by deposition

into sediment where biological and possibly chemical reduction occurs. The rate of loss of

2

toxaphene from aquatic systems will then be partially determined by particulate loading and

quality of water body; shallow particulate-laden, eutrophic waters give maximum

transformation rates of toxaphene, with half-lives on the order of a few months for some

components. The physical properties and chlorinated functionality of the individual toxaphene

structures will govern which components will be sorbed and then subsequently reduced. The

finding of some toxaphene components in aquatic sediments and species after several years

indicates that bioaccumulation in the food chain may occur. Unless clear evidence proves

otherwise, the absence of acute toxicity effects of toxaphene should not be interpreted as

indicating that all toxaphene has been degraded and chronic toxic effects are absent."

The terrestrial fate of toxaphene is described by Toxnet Search (1991), "Toxaphene released

to soils will persist for long periods of time (the half-life values from approximately 1 year to 14'

years reported). Biodegradation may be enhanced somewhat in flooded soils under anaerobic

conditions. Its low water solvability and strong adsorption to soil makes leaching into

groundwater unlikely. It will be subject to loss by evaporation but will not hydrolyze or be

removed significantly by runoff unless carried off adsorbed to clay particles."

Lindane has been widely used as an insecticide for lumber, fruits and vegetables, shrubs,

livestock and pets. Lindane may slowly biodegrade in aerobic conditions and rapidly

biodegrade in anaerobic conditions. When this compound has provided the sole carbon source,

it has been found to support the growth of 71 microorganisms isolated from loamy sand.

Photolysis does not act effectively on lindane in water. Volatization of lindane from water has

demonstrated an estimated half-life of 1 IS days. Human exposure to lindane has been primarily

through food sources.

3

m- METHODS AND MATFPTAT ^

Sampling procedures were adapted from the National Enforeement Investigations Center

(NBIC) Pesticide Sampling Guide developed by Schneider (1985), as follows:

Cgnlainer Prmratian. Residue or formulation subsamples should not be in contact with rubber

or non-teflon plastic. Organic material can leach from rubber or plastic into samples causing

contamination, or pesticides can absorb into or adsorb onto rubber and plastics. In both cases,

analytical results may be invalidated. To avoid preparation problems, samples must be collected

with clean tools (preferably of glass or stainless steel) and placed into clean glass jars or

acetone-washed aluminum foil. Never place samples directly info plastic bags or plastic bodies

Botde caps or jar Uds must be lined with foil or teflon. Generally, foe cleaning mefood consists

of flushing inner surfaces of containers (bottles or foil) including lined lids with appropriate

solvents. An ounce of solvent (acetone or equivalent) per pint-sized container is usually

sufficient. Allow the container and lid to dry thoroughly before use. Solvent rinse should be

properly discarded with other wastes; do not reuse it. Sample containers from lab will be

precleaned.

Eaclaeine and Storage. Separate containers should be used for each sample or subsample unless

composite-type sampling is preplanned by foe inspector and chemist. After samples are placed

tnto clean bottles, jars or foil, foey can be tagged and sealed in plastic bags to comply with

identification and custody procedures. Geneially, an ice or picnic-type ches, with crushed ice is

satisfactory to maintain samples below 40» F. Quick delivery to foe laboratory is necessary to

meet prearranged analytical schedules and holding time (storage) requirements.

4

Labeling. Identification tags, labels or seals attached to samples vary in format but all must

have at least the following information: sample number, date, contents and collector's name or

initials. This minimal information should be supplemented by detailed logbook information

about the sample.

Safety. Each sampling procedure described poses a degree of health and safety risk. To

minimize this risk protective clothing and safety equipment must be used by inspectors. The

protective gear must be adequate to prevent accidental exposure to pesticides through eyes,

nose, mouth and skin. For specifics, inspectors should refer to the precautions described on the

labels of pesticides being handled and sampled in addition to being fully acquainted with safety

protocols issued by their Agency.

Water (Streams and Other Surface Water). A common method for collecting water from ponds,

lakes and streams is by dipping the sample bottle to obtain water at or near the surface. This

technique is effective because many pesticides, especially oil-based, remain on the water

surface.

Procedure:

1. Dip, pump or otherwise collect a minimum of a quart (950 ml) of water into a clean glass jar

(never use plastic bottles).

2. Avoid collection of bottom sediment; guard against roiling sediment when collecting a

subsurface water sample.

3. Each sample container should represent a single sample location.

5

4. Seal, tag and pack glass jars to comply with shipping needs. Typically, water samples should

be kept on ice and protected from direct sunlight.

Water (Tap or Wfll). Tap or well-water samples are often collected directly into a sample

bottle. If numerous samples of water are needed, volume, weight and glassware may become of

concern to the collector.

Soil. For pesticide regulatory work, soil sampling must be designed to detect overspray, drift,

spillage or some type of misapplication. Because these situations often result in pesticide

residues on the soil surface, the procedure described below is for collecting soil within the top

mch of the surface. This procedure can be used for collecting deeper soil following appropriate

excavation to the desired depth; however, care must be taken to avoid contamination of deeper

soils by high-level pesticide residues in surface deposits.

Apparatus

1. Stainless steel spatula, spoon or scoop

2. Acetone (pesticide grade)

3. Acetone-washed aluminum foil or glass jar with teflon-lined lid

4. Shallow steel pan or pail

5. Plastic bag

6. Data sheets, tags and shipping container with crushed ice

Procedure

6

1. Scrape and scoop with the spatula approximately a pint of top soil from the sample

site. Minimize collection of rocks, sticks, leaves and debris.

2. Directly place soil into labeled glass jar or onto aluminum foil lining a shallow pan (pan

supports foil to prevent tearing during soil collection).

3. Seal jar or wrap each sample in foil and place it in a plastic bag.

4. Label samples with appropriate identification and place them in the shipping container.

5. Reclean sampling tools with acetone and rinse with clean water before collecting

additional soil samples.

LABORATORY ANALYSES were conducted by standard procedures which are described in

detail in appendices A2 and A3.

IV. RESULTS.

All known sites were visited and tested by personnel from BIA-Area Natural Resources and

Navajo Superfund Office. Toxaphene concentrations are indicated in Table 2. Fifty-two (52)

sites displayed toxaphene concentrations greater than the EPA standard of 5.0 PPM. The

highest measured concentration of toxaphene in soil was at Poverty Tank in Western Navajo

Agency with a reading of 33,187 PPM. Concentrations ranged to negligible amounts at some

sites.

7

Only one water sample taken from any site indicated toxaphene or lindane concentrations

(Table 3 and Table 5, respectively) in excess of standards. That sample was taken at Crystal

Vat. Toxaphene, however, was present in negligible amounts in sources used for livestock and

domestic supplies. Small concentrations of lindane were also indicated in some water samples.

Lindane concentrations were generally not as high as toxaphene in soils. Contamination

levels are indicated in Table 4. Forty-seven (47) sites yielded samples that exceeded the EPA

standard.

During the course of this inventory, some sites were found to be destroyed, removed or

covered. Other sites were located by investigators during the sampling procedures. Sites that

were covered or removed and can no longer be accurately situated are shown in Table 6. Still

other sites were identified by Agency personnel or Chapter officials. These are not included in

this report but may total another 50-75 locations.

v. REMEDIATION OPTIONS

There are several alternative treatments which address the elimination of environmental

contamination by toxaphene. There are specific advantages to each, depending on the urgency

of the problem, proximity to habitations or development and availability of funds.

L) Level site and cover with clean soil.

Toxaphene is relatively persistant in soils with a half-life value of one (1) to fourteen (14)

years. Biodegradation is enhanced by the anaerobic conditions existing in wet or flooded soils.

8

Levelling and covering will allow biodegradation to occur under natural (albeit slower)

conditions while chemical exposure to macroorganisms is reduced. This option would allow

natural degradation while reducing the risk of bioaccumulation.

2.) Physical removal.

Contaminated soils may be removed with backhoes and placed in sealed containers for

transport to authorized disposal sites. Since no approved disposal sites exist on or near the

Navajo Reservation, the logistics of this alternative would be impractical and probably very

expensive.

3.) Spreading,

Removal of soil from contaminated sites and spreading them in shallow layers on the surface

may facilitate the volatilization and photochemical breakdown of toxaphene. Since the

pesticides adsorb strongly to soil particles, however, the outcome of this strategy is not certain.

Site-specific studies of this method are not available for this location.

4.) Aerobic degradation.

The addition of nutrient material can enhance the microbial degradation of some pesticides

but is not effective in the treatment of more stable, less volatile chemicals such as toxaphene.

This process may be accelerated, in some cases, by the addition of alkali or oxidants to activate

chemical reaction or by nutrients and other amendments to stimulate microbial action (Mirsatan

et al. 1981).

9

5.) Anaerobic degradation

Biodegradation of toxaphene can be demonstrated in such anaerobic conditions as flooded

soil. Field and laboratory applications have accelerated this process by amending contaminated

soils with nutrient material. Toxaphene has been broken down to produce dechlorinated

residues when incubated under anaerobic conditions with energy sources (Ibid).

In a field application of this methodology on Navajo Area, Weston/ERT provided and

constructed field trials, under contract to Navajo Superfund Office, near Nazlini and

Whipporwill on the Navajo Reservation in 1992. Toxaphene contaminated soils were mixed

with sheep manure, blood meal and limestone in a 10:1:1:1 ratio and placed in 325 gallon tanks,

then saturated and sealed. In those conditions, toxaphene was degraded 70-80% at 7 weeks

(Personal Communication, Tom Morris, N.S.O., June, 1992).

VI. SUMMARY

During the inventory (1990-92), nine vats were not found. It was assumed that these were

destroyed, removed or buried. Local residents and chapter officials were not able to recall exact

locations. Sites not found are indicated in Table 6.

The remaining assigned locations included 52 sites in which soil samples exceeded the EPA

standard of 5.0 PPM. An additional 47 sites contained lindane concentrations in soils in excess

of the standard. These sites are indicated in the Results section. Each constitutes a hazard to

humans, livestock and wildlife.

10

Table 1. List of Known Dipping Vat Locations.

Agency Dist No.

Chinle 10

Vat Name

Lee Toadleoa

Many Farms

Rough Rock

Chinle

Fluted Rock

Alford Taylor Spider Rock

Nazlini Cottonwood

Chinle

Location

6 miles N. of Chinle Agency, E. side of Chinle wash 1/4 mile North of well 10R-98 which is 1/4 mile E. of Many Farms 150 feet S. of well 10R-119, which is 7 miles NE. of Rough Rode 500 feet W. of well 10K-200 which is 6 miles N. of Chinle 500 feet N. of well 10T-516 which is 4 miles N. of Fluted Rock about 10 miles NW. of Chinle SE. of Chinle on South Canyon Road Nazlini 200 feet E. of well #10R-31, 9 miles SE. of Salina Spring trading post 500 feet SE. of well 10R-54 which is 4 miles S. of Chinle

11 Wheat field Black Rock Butte

Wheat field Lake 1/2 mile NE.of well 11T-505 which is 3 miles N. of Black Rock Butte

Becenti 400 ft S. of chapter, 400 ft S. of well 15025

White Rock 500 ft W. of chapter, 1000 ft N. of well 15B-23

Littlewater 1/2 mi SW. of chapter house, 500 ft N. of well 15B-35

Standing Rock 3 1/2 mi. NW. of Dalton Pass chapter, 1000 ft SW. of well 15B-10

Littlewater 6 mi SE. of chapter, 500 ft N. of well 15K-338

Dalton Pass 1 mi W. of chapter, 1/2 mi W. of well 15T-538

Standing Rock 2000 ft N. of chapter house, 800 ft SE. of well 15A-27

Lake Valley 100 ft W. of chapter; 60 ft S. of NTUA

Standing Rock 4 1/2 mi. NW. of chapter house, 300ft E.of well #15B-1

Toireon 9 mi S. of chapter, 200 ft S. of well 15B-32

Whitehorse Lake 8 mi SE. of chapter, 200 ft E.

Index

D-10-10

10.4

10.5

10.6

10.7

10.8 10.9

10.11 D-10-4

10.3

11.2 11.1

15.8

15.9

15.5

D-15-1

15.6

15.7

15.2

15.1

D-15-2

15.11

15.12


Dist Agency No. Vat Name Location Index

of well 15B-28 Whitehorse Lake 8 mi SE. of chapter, 200 ft S. 15.13

of well 15B-28

Baca (old) 6 mi S. of chapter; 100 ft N. 16.8 of well 16K-317

Rock Springs 3 mi E. of chapter; 100 ft SW. 16.13 of weU 16T-333

Red Rock (Twin Butte) 100 yd NE. of chapter; 25 ft 16.14 W. of well 16T-542; VAT NEVER USED

Thoreau 3 mi E. of chapter, 100 ft S. 16.3 of well 16T-349

Thoreau 6 mi W. of chapter, 500 ft S. 16.4 of well 16T-350

Smith Lake 300 ft E. of chapter, 30 ft of 16.5 well 16T-325

Casamero Lake 1000 ft SW. of chapter, 3000 16.6 ft E. of NTUA system well 16T-588

Rock Springs 100 yd E. of chapter house 16.16 Baca (new) 6 mi S. of chapter house; 1/2 D-16-1

mi E. of well 16K-317 Bread Springs 300 ft SW. of chapter; 500 ft 16.11

S. of weU 16T-502 Tsayatoh 1 mi E. of chapter; 100 ft S. 16.12

of well 16K-339 Haystack 1 mi W. of Haystack, 300 ft 16.7

W. of well 16T-552 Pinedale 1/2 mi NW. of chapter; 200 ft 16.2

N. of well 16T-348 Church Rock 8 mi NW. of chapter, 1000 ft 16.1

SE. of well 16K-340

Ojo Encino 600 ft E. of chapter; VAT D-19-2 NOT FOUND

Pueblo Pintado 2 1/2 mi NE. of chapter; 500 D-19-1 ft W. of well 19R-289; VAT NOT FOUND

Canoncito 3 mi N. of chapter; 200 ft S. 21.2 of well #14; VAT NOT FOUND •

Canoncito 2 1/2 mi E. of chapter; 200 ft 21.1 S. of well #6; VAT NOT FOUND

22 /iamo 2 1/2 mi S. of chapter; 1/2 mi 22.1 W. of well #12


Agency Dist No. Vat Name Location Index

Eastern 23

Ft. Defiance 14

17

18

Ramah (at Pinehill)

Ramah

Ramah

Ramah

Ramah

Ramah

Coyote Canyon

Coyote Canyon

Naschitti Naschitti

Mexican Springs

Tohatchi

Black Springs

Cornfield

Wide Ruins

Steamboat Grease wood

Fort Defiance

Sawmill

Crystal Oak and Pine Springs Road

Fort Defiance

Twin Lakes

12 mi S. of chapter; 200 ft E. of well #13 10 mi S. of chapter; 400 ft S.of well #12 6 mi SE. of chapter; 100 ft E. of weU #7; No Vat S mi NW. of chapter house; 300 ft S. of well #1 500 ft N. of community sale yard and well #5 50 ft NE. of chapter house; VAT NOT FOUND

50 feet E. of well 14T-324, which is 5 miles E. of chapter 500 feet N. of well #14A-79, 4 miles SW. of chapter house Sweetwater area 1/2 mile E. of well #14-5-6, 12 miles W. of chapter house 50 feet W. of well 14T-503 which is 8 miles W. of chapter 50 feet E. of weU 14T-591 which is 1 mile E. of chapter Black Springs

near well 17-M-91A, SW. of Cornfields 1/5 mile 1 mile E. of chapter house, well #17-5-26 near well 17-M-78 well 17-3-4, is 1 1/2 mile S. of chapter

2 miles E. of 7toll in Ft. Defiance on Coalmine Road; 350 ft W. of windmill 18T-564 well 18K-330 is 9 miles N. of Sawmill on White Clay Road Crystal 9.33 miles W. of chapter house, 200 feet S. of well 18T-569 7 miles NW. of Ft. Defiance Chapter House on Blue Canyon Road, 300 feet N. of well #18539 500 feet S. of Ft. Defiance Chapter house

23.5

D-23-4

23.2

D-23-1

D-23-5

D-23-3

14.4

D-14-1

D-14-2BS D-14-2AS

14.2

14.1

14.6

17.3

D-17-1

17.1 17.4

D-18-5

18.3

18.0 D-18-10

D-18-6

D-18-7


Agency Dist No.

Ft. Defiance 18

NPL

Vat Name

St. Michael

Fort Defiance

Lupton

Pine Springs

Houck

Lupton

Oak Springs

Sheep Dip Well Sheep Dip Well

Red Lake

Pinon

Low Mountain Kitsilly

Blue Gap

Whipporwill

Cottonwood (old)

Beshbito-Jeddito

White Cone

Jeddito Island

White Cone

Location Index

2 miles SE. of Chapter House, 1/4 mile SE. of Notah's Residence near well 18T-567, 5 miles N. of Ft. Defiance on old Red Lake Road 3.S miles W. of chapter house, behind old three bogans 7 miles N. of Pine Springs well (C18T-569 3 miles NW. of chapter house, near windmill old vat, S miles W. of chapter house, across from 3 hogans 2 1/2 miles SE.of chapter bouse, 200 feet S. of well 18T-562

windmill 302-4 windmill 302-4

1/2 mi E. of old Red Lake store; 300 ft S. of HWY 160

100 ft SW. of well 4M-95 which is 2 mi NW. of Pinon School Low Mountain 200 ft W. of weU 4K-382 which is 1/4 mile W. of Kitsilly Pre-School 1/4 mi W. of well 4K-388 NPL-6 which is near the chapter 1 mi E. of chapter, utilizes NPL-12 well 4T-550 300 ft N. of wells 10R-51A & NPL-20 10R-51B which are 1/4 mile N. of Cottonwood School

about 1.5 mi W. of D-7-AS Steamboat,AZ; 500yd SW. of well #7T-543 NW. corner of Range Unit • NPL-3 511; 500 ft S. of existing fence line(vat buried) 200 ft SE. of Jeddito Chapter NPL-4 Wa? chouse SW. corner of Range Unit NPL-2 513; 1/4 mi S. of old White Cone

D-18-8

D-18-14

D-18-11

D-18-15

D-18-13

D-18-12

D-18-9

SDW-002 SDW-001

NPL-10

NPL-11

Lm-001 NPL-15


Dist Agency No. Vat Name Location

chapter house White Cone E. end of Range Unit 507;

300 ft SE. of windmill #507-5

Shiprock Montuzuma Creek

Red Mesa (new)

Sweetwater

Red Mesa (old)

Teecnospos

3/4 mile SE. of Montuzuma Creek community near well 9-6-1 which is N. of AZ-UT border 500 feet E. of well 9K-216, which is 4.5 miles E of chapter 300 feet N. of well 9-6-1, which is 3 miles N. of AZ-UT border 4 miles W. of chapter, 500 feet N. of well 9T-527

Cudei 4 miles W. of Shiprock chapter, S. side of San Juan River

Sanostee (Black Rock 10 mi. W. of chapter house area) Shiprock 1 1/2 mile W. of Station 16 Shiprock 2 well 12K-317, 15 miles NW.

of Shiprock Sanostee 5 mi. E. and 1 mi. N. of

junction road #5016,#5010 & #5012; junction is 3 miles N. of chapter house

Sanostee (Black Rock 10 mi. W. of chapter house area) Hogback 5 miles E. of Shiprock chapter Aneth 2500 feet SE. of chapter house Two Grey Hills 20 mi. W. of Toadlena Mt.

area Sheep Springs 10 mi. W. of chapter house,

Cottonwood Spr area Beclabito short distance from trading

post Sanostee (Big Valley area) 12 mi. W. of chapter house

13 Nennanezad 5 mi. W. of chapter house Upper Fruitland 1/2 mi. W. of chapter house

Western 1 Kaibeto West of Page Hwy. by windmill by watertank

Kaibeto E. side of day school water well and old TP

Kaibeto S. of chapter house, across Hwy next to a corral

Dick Slick at windmill K-221, 4 miles

Index

NPL-1

9.6

9.5

9.4

9.2

9.1

12.3

D-12-3C

12.2 12.13

D-12-3A

D-12-3B

12.4 12.12 D-12-5

D-12-6

D-12-8

D-12-4

D-12-11 12.9

1.1

D-2-4

D-2-5

1.2

Agency

Iah!e_l. List of Known Dipping Vat Locations.

Vat Name Location

Dist No. Index

First Windmill

Inscription House

Shonto

Navajo Mountain

Navajo Mountain

Gap Vat

Coalmine Mesa

Tuba City

Cameron

Proverty Tank

Natani Area Dan Yazzie's

Canyon Diablo

Birdsprings

Leupp

Tolani Lake

El Paso

Sand Springs

south of Page Hwy, vat is buried 500 feet west of windmill 1A-11S, off dirt road

3/4 mile E. of Inscription House chapter house, branding corral N. of chapter house along wash, vat is buried on AZ side by branding corral, N. of dirt road by water tank, about 300 yards o f f road, East of chapter house on Utah side, vat is buried

1/4 mile off Hwy 89, N. of chapter house by old rock tank across wash 6 miles S. of Hwy 264, about 100 feet E. of windmill 3M-175 1/2 mile E. of Tuba City, beiow Hopi reservoir by dirt road appro*. 1 mile off Hwy 89, W. of chapter house by broken dam, about 4 miles W. of Grey Mountain Trading Post

could not locate 1 1/2 mile S. of river, off dirt road N. of windmill 5M-319 6 miles W. of Winslow road by windmill 5M-94 1/4 mile off Hwy, about 300 yards W. of chapter house by windmill 5T-509 E. of old Leupp, by rock tank E. of windmill #5M-1A, 1/2 mile off main dirt road 4 miles E. of Hwy 2, approx. 100 yards S. of windmill 5M-30 1/2 mile N. of Hwy 15 by El Paso station 3 miles N. of Leupp road,

1.3

2.2

2.3

2.1

2.1

3.4

3.3

3.1

3.6

3.5

5.6 D-5-5

5.7

5.5

D-5-1

5.2

l)-5-2

5.3


Agency Dist No. Vat Name

Oljato

Chilchinbeto Kayenya Community

Location

Do ma Dinnehotso

Cut Foot Wash

Index

above spring

SW. of chapter house, S. of 8.3 Hwy, vat is buried 3/4 mile N. of diversion dam 8.1 along dirt road by branding corral 1 1/2 mile S. of Oljato chapter 8.2 house at branding corral by reservoir, 100 yards W. of dirt road 1/2 mile SE. of trading post 8.5 2 miles S. of Kayenta, S. of 8.4 windmill 8A-106, along dirt road by branding corral

Table 2. Toxaphene in Soil Samples Ranked in in Descending Order of Concentrations.

\ ! r,

I

Toxaphene (milligram/kg) Vat Name Agency

Dist No. Index

Lab Sample

No.

f 't f

33187.500 Proverty Tank Western 3 3.5 92N1197

I [ 3590.400 Pine Springs Ft Defiance 18 D-18-15 92N925 •

1679.786 Upper Fniitland Shiprock 13 12.9 91N176

t

1400.461 Lupton Ft. Defiance 18 D-18-11 92N1001

J;

f

I |

816.266 Ft. Defiance (Blue Canyon Road)

Ft Defiance 18 D-18-6sA 92N913

769.543 Shiprock 2 Shiprock 12 12.13 91N179

763.022 Oak and Pine Springs Road

Ft. Defiance 18 D-18-10 92N923

•

743.800 Lee Toadlena Chinle 10 D-10-10 92N1006

720.965 St. Michaels Ft Defiance 18 D-18-8 92N918

692.167 Tohatchi Fort Defiance

14 14.1 90N456

400.980 Oak Springs Ft. Defiance 18 D-18-9 92N921

382.246 Nazlini Chinle 10 10.11 90N397

325.390 Cottonwood (old) NPL 4 NPL-20 90N454

154.783 Blue Gap NPL 4 NPL-6 90N452

139.964 Ft. Defiance Ft Defiance 18 D-18-14 92N916

127.657 Thoreau (well 16T-349) Eastern 16 16.3 90N374

118.916 Shiprock 1 Shiprock 12 12.2 91N177

110.465 Beshbito-Jeddito NPL 7 D-7-AS 92N1081

: 102.152 Whiperwill NPL 4 NPL-12 90N450

101.841 Thoreau (well 16T-350) Eastern 16 16.4 90N375

! 86.695 Sanostee (Big Valley) Shiprock 12 D-12-4 92N982

i. 72.498 Tohatchi Diquat Ft Defiance 14 D-14-3 92N977

:

71.380 Dalton Pass Eastern 15 15.7 91N188

70.373 Littlewater (well 15B-35) Eastern 15 15.5 90N354

I ppm - I milligrams/kg

mT

Table 2. Toxaphenein Soil Samples Ranked in in Descending Order or Concentrations.

Lab Toxapheiu Disi Sample

(milligram/kg) Vat Name Agency No. Index No.

60.350 Littlewater (well 15K-338)

Eastern 15 15.5 90N353

58.386 Jeddito Island NPL 7 NPL-4 92N1085

57.016 Two Grey Hills Shiprock 12 D-12-5 92N1016

55.559 Pinon NPL 4 NPL-11 90N448

45.553 Sanostee (Black Rock) Shiprock 12 D-12-3C 92N985

40.821 Sanostee Shiprock 12 D-12-3A 92N983

38.439 Naschitti Ft Defiance 14 D-14-2 AS 92N1023

35.201 Sanostee (Black Rock) Shiprock 12 D-12-3B 92N984

34.158 Coyote Canyon Ft Defiance 14 14.4 91N116

31.592 Houck Ft. Defiance 18 D-18-13 92N1004

29.305 Fluted Rock Chinle 10 10.7 91N320

24.015 Kitsilli NPL 4 NPL-15 91N1153

23.133 Cudei Shiprock 12 12.3 91N171

22.465 Standing Rock (well 15B-10)

Eastern 15 D-15-1 92N1026

21.851 Rock Springs (well 16T-333)

Eastern 16 16.13 90N435

15.760 Haystack Eastern 16 16.7 91N329

14.916 Chinle (North of Chinle) Chinle 10 10.6 91N162

14.473 Low Mountain NPL 7 LM-001 91N1151

14.061 Sheep Springs Shiprock 12 D-12-6 92N1018

11.774 Whitecone NPL 7 D-NPL-1 92N1079

11.755 Standing Rock (well 15B-1)

Eastern 15 D-15-2 92N1028

9.552 Black Springs Ft Defiance 14 14.6 90N458

8.535 St. Michaels Ft Defiance 18 D-18-8 92N919

1 ppm = 1 milligrams/kg


Toxaphene (milligram/kg) Vat Name Agency

Dist No. Index

Lab Sample

No.

7.902 Greasewood Ft Defiance 17 17.4 90N376

7.668 Pinedale Eastern 16 16.2 91N187

6.983 Cottonwood NPL 4 NPL-14 91N1147

6.767 Mexican Springs Fort Defiance

14 14.2 91N123

5.054 Ft. Defiance (Coalmine Road)

Ft Defiance 18 D-18-5 92N911

4.408 Aneth Shiprock 12 12.12 91N175

4.271 Chinle (South of Chinle) Chinle 10 10.3 90N395

3.809 Steamboat Ft Defiance 17 17.1 90N372


3.207 Ft. Defiance (Blue Canyon Road)

Ft Defiance 18 D-18-6sB 92N914

2.826 Crystal Ft Defiance 18 18.0 90N391

2.354 Tsayatoh Eastern 16 16.12 90N433

1.928 Red Mesa (old) Shiprock 9 9.2 90N462

1.299 Sawmill Ft Defiance 18 18.3 91N119

1.243 Lake Valley Eastern 15 15.1 91N190

1.196 Baca (old) Eastern 16 16.8 90N444

1.003 Whiperwill NPL 4 NPL-12 91N1149

0.886 Black Rode Butte Chinle 11 11.1 91N166

0.803 Hogback Shiprock 12 12.4 90N467

0.772 El Paso Western 5 D-5-2 92N1111

0.723 Rock Springs (100 yards East of chapter house)

Eastern 16 16.16 90N455

0.573 Ramah (well 7) Eastern 23 D-23-2 92N994

0.563 Ntschitti (Sweetwater Area)

Ft Defiance 14 D-14-2BS 92N1025

; PF* - / mill,grams/kg


Lab ioxapnene (milligram/kg) Vat Name Agency

Dist No. Index

Sample No.

0.520 Coyote Canyon Ft Defiance 14 14.5 92N1008


0.411 Teecnospos Shiprock 9 9.1 91N173

0.330 Beclabito Shiprock 12 D-12-8 92N979

0.320 Red Mesa (new) Shiprock 9 9.5 90N463

0.265 White Rock Eastern 15 15.9 91N191

0.260 Twin Lakes Ft Defiance 14 D-18-7 92N1020

0.252 Cottonwood (new) Chinle 10 D-10-4 92N1009

0.230 Rough Rock Chinle 10 10.5 91N164

0.219 Nenahnezad Shiprock 12 D-12-11 92N978

0.192 Dan Yazzies Western 5 D-5-5 92N1108

0.173 Sweeetwater (chapter house)

Shiprock 9 9.4 90N465

0.171 Kaibeto Kaibeto Kaibeto

Western Western Western

1 1 1

1.1 1.1 1.1

91N307 91N307 91N307

0.150 Wide Ruins Ft Defiance 17 17.2 92N910

0.148 Wide Ruins Ft Defiance 17 17.2 92N909

0.143 Bread Springs Eastern 16 16.11 90N471

0.139 Church Rock Eastern 16 16.1 90N469

0.124 Navajo Mountain Western 2 2.1 90N480

0.095 Smith Lake Eastern 16 16.5 90N441

0.093 Baca (new) Eastern 16 D-16-1 92N1125

0.081 Becenti Eastern 15 15.8 90N352

0.074 Lupton Ft. Defiance 18 D-18-12 92N1002

0.065 Standing Rock (well ICA n\

Eastern 15 15.2 90N351

1 ppm = 1 milligrams/kg


Toxaphene (milligram/kg)

0.062

0.060

0.039

0.024

0.014

0.000

Vat Name Agency

Ramah(well 1) Eastern

Lab Dist Sample No. Index No.

23 D-23-1 92N992

Ramah

Steamboat

Cameron

Cornfields

Eastern

Ft Defiance

Western

Ft Defiance

23

17

3

17

D-23-4

17.1

3.6

17.3

92N996

90N373

90N475

91N100

Alford Taylor Chinle 10 10.8 91N161 Alamo Eastern 22 22.1 90N417 Inscription House Western 2 2.2 92N1204 Ramah (well 13 at Eastern 23 23.5 90N438 Pinehill) Ramah Eastern 23 D-23-5 92N998 Cottonwood NPL 4 NPL-14 91N1146 Pinon NPL 4 , NPL-5 91N1161 Inscription House Western 2 2.2 92N1203 Sheep Dip Well (windmill NPL 4 SDW-001 91N1155 302-4) Sheep Dip Well (windmill NPL 4 SDW-002 91N1156 302-4) First Windmill Western 1 1.3 92N1199 Kitsilli NPL 4 NPL-15 9 IN 1154 Dick Slick Western 1 1.2 91N308 Kaibeto Western 1 D-2-4 92N1202 Blue Gap NPL 4 NPL-6 91N1160 Beclabito Shiprock 12 D-12-8 92N980 Do ma Dinnehotso Western 8 8.3 91N343 Birdsprings Western 5 5.5 91N313 Cut Foot Wash Western 8 8.1 91N306 Oljato Western 8 8.2 90N481 Whitehorse Lake Eastern 15 15.12 91N332 Spider Rock Chinle 10 10.9 91N165 Chilchinbeto Western 8 8.5 91N305 Many Farms Chinle 10 10.4 91N160 Doma Dinnehotso Western 8 8.3 91N344 Shonto Western 2 2.3 92N1205 Montuzuma Creek Shiprock 9 9.6 91N174 Whitehorse Lake Eastern 15 15.13 91N333 Coalmine Mesa Western 3 3.3 90N477 Gap Vat Western 3 3.4 92N1201 Tuba City Western 3 3.1 90N473 Sand Springs Western 5 5.3 91N310 Leupp Western 5 D-5-1 92N1110 Tolini Lake Western 5 5.2 91N312 Casamero Lake Eastern 16 16.6 90N431

- / milligrams/kg

Table 3. Concentration of Toxaphene in Water Samples

Toxaphene milligram/kg Vat Name

Date Sampled Index

Lab Sample

No.

0.0004800 Chinle (South of Chinle) Aug 16, 1990 10.3 90N394 0.0000000 Lee Toadlena Jul 14, 1992 D-10-10 92N1005 0.0000000 Many Farms Apr 1,1991 10.4 91N159 0.0000000 Chinle (North of Chinle) Apr 1, 1991 10.6 91N163 0.0000000 Fluted Rock Apt 18,1991 10.7 91N321 0.0000000 Nazlini Aug 16, 1990 10.11 90N398 0.0000000 Cottonwood (new) Jul 15, 1992 D-10-4 92N1010

0.0004000 Black Rock Butte Apr 4,1991 11.1 91N167

0.0000000 Standing Rock (well 15A-27) Jul 19, 1990 15.2 90N332 0.0000000 Whitehorse Lake Apr 23, 1991 15.13 91N334 0.0000000 Whitehorse Lake Apr 23, 1991 15.12 91N334 0.0000000 Torreon Apr 23, 1991 15.11 91N335 0.0000000 Becenti Jul 19, 1990 15.8 90N334 0.0000000 Becenti Jul 19, 1990 15.8 90N335 0.0000000 Littlewater (well 15B-35) Jul 19, 1990 15.5 90N337 0.0000000 Littlewater (well 15B-35) Jul 19, 1990 15.5 90N336 0.0000000 Standing Rock (well 15B-1) Jul 20, 1992 D-15-2 92N1027 0.0000000 Standing Rock (well 15A-27) Jul 19, 1990 15.2 90N333 0.0000000 Dalton Pass April, 1991 15.7 91N189

0.0016100 Church Rock Sep 12, 1990 16.1 90N470 0.0006200 Thoreau (well 16T-350) Aug 8, 1990 16.4 90N377 0.0005200 Smith Lake Sep 10, 1990 16.5 90N442 0.0001680 Tsayatoh Sep 5, 1990 16.12 90N434 0.0000900 Casamero Lake Aug 31, 1990 16.6 90N431 0.0000500 Rock Springs (well 16T-333) Sep 5, 1990 16.13 90N436 0.0000000 Haystack Apr 22, 1991 16.7 91N330 0.0000000 Bread Springs Sep 12, 1990 16.11 90N472 0.0000000 Pinedale April, 1991 16.2 91N186 0.0000000 Baca (old) Sep 10, 1990 16.8 90N443

0.0000000 Canoncito (no vat) Apr 22, 1991 21.1 91N331

0.0003900 Alamo Aug 23, 1990 22.1 90N416

0.0001500 Ramah (well 13 at Pinehill) Sep 6, 1990 23.5 90N439 0.0000700 Ramah (well 2; 6 miles Sep 16, 1990 23.2 90N440

southeast of chapter) 0.0000000 Ramah (well 7) Jul 13, 1992 D-23-2 92N995 0.0000000 Ramah Jul 13, 1992 D-23-4 92N997 0.0000000 Ramah(well 1) Jul 13, 1992 D-23-1 92N993

0.0013500 Tohatchi Sep 11, 1990 14.1 90N457

0.0005400 Coyote Canyon Mar LI, 1991 14.4 91N117

0.0000000 Black Springs Sep 11, 1990 14.6 90N460

Tahlfi_3. Concentration of Toxaphene in Water Sample

Agency

Ft Defiance

Dist. No.

Toxaphene milligram/kg

Lab

Vat Name

14

17

18

Ft. Defiance

NFL

18

Shiprock

12

Western

0.0006300 0.0000000 0.0000000

0.0000000 0.0000000 0.0000000 0.0000000 0.0000000

0.0000000 0.0000000

Red Mesa (new) Teecnospos Sweeetwater (chapter house)

Sheep Springs Shiprock 2 (well 12K - 317) Two Grey Hills Sanostee (Big Valley) Shiprock 1

First Windmill Dick Slick

0.0000000 Black Springs

0.0000000 Coyote Canyon

0.0007600 Greasewood 0.0004200 Greasewood 0.0000000 Greasewood 0.0000000 Cornfields

0.0567500 Crystal 0.0010400 Sawmill 0.0000000 St. Michaels 0.0000000 Ft. Defiance 0.0000000 Pine Springs 0.0000000 Ft. Defiance (Blue Canyon

Road) 0.0000000 Ft. Defiance (Coalmine Road)

0.0000000 Oak Springs

0.0000000 Oak and Pine Springs Road 0.0000000 Houck

0.0009770 Pinon 0.0004637 Cottonwood (old) 0.0004384 Whiperwill 0.0002891 Blue Gap 0.0000000 Kitsilli 0.0000000 Blue Gap 0.0000000 Whiperwill 0.0000000 Cottonwood 0.0000000 Pinon

0.0000000 Beshbito-Jeddito 0.0000000 Whitecone

Date Sampled Index

Sample No.

Sep 11, 1990 14.6 90N459

Jul 14, 1992 14.5 92N1007

Aug 7, 1990 17.4 90N380 Aug 7, 1990 17.4 90N378 Aug 7, 1990 17.4 90N379 Mar 12, 1991 17.3 91N101

Aug 16, 1990 18.0 90N392 Mar 14, 1991 18.3 91N120 Jun 23, 1992 D-18-8 92N920 Jun 18, 1992 D-18-14 92N917 Jun 23, 1992 D-18-15 92N926 Jun 18, 1992 D-18-6 92N915

Jun 18, 1992 w D-18-5 92N912

Jun 23, 1992 D-18-9 92N922

Jun 23, 1992 D-18-10 92N924 Jul 14, 1992 D-18-13 92N1003

Sep 11, 1990 NPL-11 90N447 Sep 11, 1990 NPL-20 90N453 Sep 11, 1990 NPL-12 90N449 Sep 11, 1990 NPL-6 90N451 Jul 25, 1991 NPL-15 91N1152 Jul 26, 1991 NPL-6 91N1159 Jul 24, 1991 NPL-12 91N1150 Jul 22, 1991 NPL-14 91N1148 Jul 26, 1991 NPL-5 91N1158

Jul 30, 1992 D-7-AS 92N1082 Jul 30, 1992 D-NPL-

1 92N1080

Sep 11, 1990 9.5 90N464 Apr 8, 1991 9.1 91N172 Sep 11, 1990 9.4 90N466

Jul 16, 1992 D-12-6 92N1019 Apr 9, 1991 12.13 • 91N180 Jul 16, 1992 D-12-5 92N1017 Jul 9, 1992 D-12-4 92N981 Apr 9, 1991 12.2 91N178

Sep 15, 1992 1.3 92N1200 Apr 15, 1991 1.2 91N309

Table 3. Concentration of Toxaphene in Water Samples

Toxaphene milligram/kg Vat Name

Date Sampled Index

Lab Sample

No.

0.0001500 Navajo Mountain Sep 13, 1990 2.1 90N479 0.0000000 Shonto Sep 16, 1992 2.3 92N1206

0.0011900 Coalmine Mesa Sep 12, 1990 3.3 90N478 0.0000000 Proverty Tank Sep 15, 1992 3.5 92N1198 0.0000000 Tuba City Sep 12, 1990 3.1 90N474 0.0000000 Cameron Sep 12, 1990 3.6 90N476

0.0000000 Birdsprings Apr 16, 1991 5.5 91N314 0.0000000 Dan Yazzies Aug 11, 1992 D-5-5 92N1109 0.0000000 Sand Springs Apr 16,1991 5.3 91N311 0.0000000 El Paso Aug 11, 1992 D-5-2 92N1112

0.0001600 Oljato Sep 13, 1990 8.2 90N482 0.0000000 Doma Dinnehotso May 2, 1991 8.3 91N345 0.0000000 Doma Dinnehotso May 2, 1991 8.3 91N346

Table 4. Concentration of Lindane Soil Samples

Lindane Lindane

Milligram/kg Vat Name Date

Sampled Index

Lab Sample

No.

0.00 0.00000 0.00000 0.00000 0.00000

Alford Taylor Spider Rock Many Farms Rough Rock

Apr 1, 1991 Apr 2, 1991 Apr 1, 1991 Apr 2, 1991

10.8 10.9 10.4 10.5

91N161 91N165 91N160 91N164

0.36 0.00036 Cottonwood (new) Jul 15, 1992 D-10-4 92N1009

8.93 0.00893 Chinle (South of Chinle) Aug 16, 1990 10.3 90N395

20.10 0.02010 Chinle (North of Chinle) Apr 1, 1991 10.6 9 IN 162

35.39 0.03539 Lee Toadlena Jul 14, 1992 D-10-10 92N1006

73.22 0.07322 Fluted Rock Apr 18, 1991 10.7 91N320

352.00 0.35200 Nazlini Aug 16, 1990 10.11 90N397

0.00 0.00000 Black Rock Butte Apr 4,1991 11.1 91N166

0.00 0.00000 Whitehorse Lake Apr 23, 1991 15.13 91N333

0.17 0.00017 Becenti Jul 19, 1990 15.8 90N352

0.19 0.00019 Standing Rock (well 15A-27) Jul 19, 1990 15.2 90N351

0.41 0.00041 White Rock Apr 11, 1991 15.9 91N191

0.78 0.00078 Lake Valley Apr 11, 1991 15.1 91N190

1.18 0.00118 Whitehorse Lake Apr 23, 1991 15.12 91N332

3.49 0.00349 Standing Rock (well 15B-1) Jul 20, 1992 D-15-2 92N1028

8.49 0.00849 Dal ton Pass April, 1991 15.7 91N188

14.95 0.01495 Standing Rock (well 15B-10) Jul 20, 1992 D-15-1 92N1026

20.30 0.02030 Littlewater (well 15B-35) Jul 19, 1990 15.5 90N354

31.80 0.03180 Littlewater (well 15K-338) Jul 19, 1990 15.5 90N353

0.00 0.00000 0.00000 0.00000

Tsayatoh Rock Springs (well 16T-333) Baca (new)

Sep 5, 1990 Sep 5, 1990 Aug 13, 1992

16.12 16.13 D-16-1

90N433 90N435 92N1125

0.26 0.00026 Church Rock Sep 12, 1990 16.1 90N469

0.37 0.00037 Bread Springs Sep 12, 1990 16.11 90N471

0.58 0.00058 Baca (old) Sep 10, 1990 16.8 90N444


Agency Dist No. Lindane

Lindane Milligram/kg Vat Name

Date Sampled Index

Lab Sampl

No.

Eastern 16 0.59 0.00059 Smith Lake Sep 10, 1990 16.5 90N441

5.13 0.00513 Rock Springs (100 yards East of chapter house)

Sep 11, 1990 16.16 90N455

6.69 0.00669 Haystack Apr 22, 1991 16.7 91N329

21.77 0.02177 Casamero Lake Aug 31, 1990 16.6 90N431

26.43 0.02643 Pinedale Apr 11, 1991 16.2 91N187

47.56 0.04756 Thoreau (well 16T-350) Aug 8, 1990 16.4 90N375

95.11 0.09511 Thoreau (well 16T-349) Aug 8, 1990 16.3 90N374

22 2.48 0.00248 Alamo Aug 23, 1990 22.1 90N417

23 0.81 0.00081 Ramah (well 13 at Pinehill) Sep 6, 1990 23.5 90N438

1.22 0.00122 Ramah Jul 13, 1992 D-23-4 92N996

2.58 0.00258 Ramah(well 1) Jul 13, 1992 D-23-1 92N992

23.10 0.02310 Ramah (well 7) Jul 13, 1992 D-23-2 92N994

237.00 0.23700 Ramah Jul 13, 1992 D-23-5 92N998

Fort Defiance

14 44.89 0.04489 Mexican Springs Mar 18, 1991 14.2 91N123

1891.40 1.89140 Tohatchi Sep 11, 1990 14.1 90N456

Ft Defiance 14 0.00 0.00000 0.00000

Coyote Canyon Twin Lakes

Jul 13, 1992 Jul 15, 1992

14.5 D-18-7

92N1008 92N1020

1.13 0.00113 Naschitti (Sweetwater Area) Jul 20, 1992 D-14-2B S

92N1025

11.60 0.01160 Tohatchi Diquat Jul 8, 1992 D-14-3 92N977

15.92 0.01592 Coyote Canyon Mar 13, 1991 14.4 91N116

27.22 0.02722 Naschitti Jul 20, 1992 D-14-2 AS

92N1023

82.97 0.08297 Black Springs Sep 11, 1990 14.6 90N458

17 0.00 0.00000 0.00000

Wide Ruins Wide Ruins

Jun 17, 1992 Jun 17, 1992

17.2 17.2

92N909 92N910

p k


14

At E

)N441

>N4JJ

N329

N43I

<187

<375

<374

<417

[438

996

992

994

998

123 si

156

008

020

025

n

16

(23

Afrmey

f' LkfiMBCC

?: IVfunce

S'?L

Lab

Dist No. Lindane


Date Sampled Index

Sample No.

17 0.21 0.00021 Cornfields Mar 12, 1991 17.3 91N100

0.24 0.00024 Steamboat Aug 7, 1990 17.1 90N373

0.72 0.00072 Steamboat Aug 7, 1990 17.1 90N372

61.30 0.06130 Greasewood Aug 7, 1990 17.4 90N376

18 0.00 0.00000 St. Michaels Jun 23, 1992 D-18-8 92N919

0.96 0.00096 Sawmill Mar 14, 1991 18.3 91N119

1.34 0.00134 Ft. Defiance (Coalmine Road) Jun 18, 1992 D-18-5 92N911

3.32 0.00332 Crystal Aug 16, 1990 18.0 90N391

4.31 0.00431 St. Michaels Jun 23, 1992 D-18-8 92N918

211.39 0.21139 Ft. Defiance (Blue Canyon Road) Jun 18, 1992 D-18-6s B

92N914

272i00 0.27200 Pine Springs Jun 23, 1992 D-18-15 92N925

395.00 0.39500 Ft. Defiance (Blue Canyon Road) Jun 18, 1992 D-18-6S

A 92N913

623.00 0.62300 Ft. Defiance Jun 18, 1992 D-18-14 92N916

18 0.00 0.00000 0.00000

Lupton Oak Springs

Jul 14, 1992 Jun 23, 1992

D-18-12 D-18-9

92N1002 92N921

2.95 0.00295 Houck Jul 14, 1992 D-18-13 92N1004

57.50 0.05750 Lupton Jul 14, 1992 D-18-11 92N1001

90.20 0.09020 Oak and Pine Springs Road Jun 23, 1992 D-18-10 92N923

4 0.00 0.00000 0.00000

Whiperwill Sheep Dip Well (windmill 302-4)

Jul 24, 1991 Jul 25, 1991

NPL-12 SDW-00 1 NPL-6

91N1149 91N1155

0.00000 Blue Gap Jul 26, 1991

NPL-12 SDW-00 1 NPL-6 91N1160

1.30 0.00130 Pinon Jul 26, 1991 NPL-5 91N1161

8.56 0.00856 Kitsilli Jul 25, 1991 NPL-15 91N1154

11.32 0.01132 Pinon Sep 11, 1990 NPL-11 90N448

19.56 0.01956 Kitsilli Jul 25, 1991 NPL-15 91N1153

Iahle_4. Concentration of Lindane Soil Samples

Dist Lindane "T rfflflflc A8ency No. Undone Milligram/kg

Vat Name NPL

Shiprock

12

21.96

28.46

33.35

153.91

691.50

7910.00

0.00

0.61

1.93

2.48

17.80

0.26

1.39

1.42

1.44

14.92

0.00

Date Sampled Index

Lab

Sann No

1.00

3.38

7.31

0.02196 Sheep Dip Well (windmill 302-4) Jul 25, 1991 SDW-00 91N1156 2

0.02846 Cottonwood Jul 22, 1991 NPL-14 91N1147

0.03335 Whiperwill Sep 11, 1990 NPL-12 90N450

0.15391 Blue Gap Sep 11, 1990 NPL-6 90N452

0.69150 Cottonwood Jul 22, 1991 NPL-14 91N1146

7.91000 Cottonwood (old) Sep 11, 1990 NPL-20 90N454

0.00000 Whitecone Jul 30, 1992 D-NPL- 92N1084

0.00000 Jeddito Island Jul 30, 1992

3 NPL-4 92N1085

0.00061 Low Mountain Jul 24, 1991 LM-001 91N1151

0.00193 Whitecone Jul 30, 1992 D-NPL-

2 92N1083

0.00248 Whitecone Jul 30, 1992 D-NPL-

1 92N1079

0.01780 Beshbito-Jeddito Jul 30, 1992 D-7-AS 92N1081 0.00026 Teecnospos

Apr 8,1991 9.1 91N173

0.00139 Red Mesa (new) Sep 11, 1990 9.5 90N463

0.00142 Red Mesa (old) Sep 11, 1990 9.2 90N462

0.00144 Sweeetwater (chapter house) Sep 11, 1990 9.4 90N465

0.01492 Montuzuma Creek Apr 8, 1991 9.6 91N174

0.00000 Beclabito 0.00000 Beclabito 0.00000 Sanostee

Jul 8, 1992 Jul 8, 1992 Jul 9, 1992

D-12-8 D-12-8 D-12-3

92N980 92N979 92N983

0.00000 Sanostee (Black Rock) 0.00000 Nenahnezad 0.00000 Sanostee (Black Rock)

Jul 9, 1992 Jul 8, 1992. Jul 9, 1992

A D-12-3B D-12-11 D-12-3C

92N984 92N978 92N985

0.00100

0.00338

0.00731

Aneth

Hogback

Sanostee (Big Valley)

Apr 8, 1991

Sep 11, 1990

Jul 9, 1992

12.12

12.4

D-12-4

91N175

90N467

92N982


Atrtcj

Sb-roci

*otfrni

Disi No. Lindane


Date Sampled Index

Lab Sample

No.

12 29.24 0.02924 Cudei Apr 8, 1991 12.3 91N171

40.62 0.04062 Two Grey Hills Jul 16, 1992 D-12-5 92N1016

128.60 0.12860 Shiprock 2 Apr 9, 1991 12.13 91N179

183.40 0.18340 Shiprock 1 Apr 9, 1991 12.2 91N177

278.40 0.27840 Sheep Springs Jul 16, 1992 D-12-6 92N1018

13 432.00 0.43200 Upper Fruit land Apr 9, 1991 12.9 91N176

1 0.00 0.00000 0.00000 0.00000

Kaibeto Dick Slick First Windmill

Sep 16, 1992 Apr 15,1991 Sep 15, 1992

D-2-4 1.2 1.3

92N1202 91N308 92N1199

0.50 0.00050 0.00050 0.00050

Kaibeto Kaibeto Kaibeto

Apr 15, 1991 Apr 15, 1991 Apr 15, 1991

1.1 1.1 1.1

91N307 91N307 91N307

2 0.00 0.00000 0.00000 0.00000

Inscription House Shonto Inscription House

Sep 16, 1992 Sep 16, 1992 Sep 16, 1992

2.2 2.3 2.2

92N1204 92N1205 92N1203

0.96 0.00096 Navajo Mountain Sep 13, 1990 2.1 90N480

3 0.00 0.00000 0.00000

Gap Vat Coalmine Mesa

Sep 15, 1992 Sep 12, 1990

3.4 3.3

92N1201 90N477

0.30 0.00030 Cameron Sep 12, 1990 3.6 90N475

3.12 0.00312 Tuba City Sep 12, 1990 3.1 90N473

309.37500 Proverty Tank Sep 15, 1992 3.5 92N1197

5 0.00 0.00000 0.00000 0.00000 0.00000

Sand Springs Dan Yazzies Tolini Lake El Paso

Apr 16,1991 Aug 11, 1992 Apr 16, 1991 Aug 11, 1992

5.3 D-5-5 5.2 D-5-2

91N310 92N1108 91N312 92N1111

0.83 0.00083 Birdsprings Apr 16,1991 5.5 91N313

14.76 0.01476 Leupp Aug 11, 1992 D-5-1 92N1110

8 0.00 0.00000 0.00000

Do ma Dinnehotso Chilchinbeto

May 2, 1991 Apr 15, 1991

8.3 8.5

91N344 91N305

0.07 0.00007 Oljato Sep 13, 1990 8.2 90N481

0.21 0.00021 Do ma Dinnehotso May 2, 1991 8.3 91N343


Lab Lindane Date Sample

Agency No. Lindane Milligram/kg Vat Name Sampled Index No.

Western g 63.39 0.06339 Cut Foot Wash Apr 15, 1991 8.1 91N306

Table 5. Concentration of Lindane in Water Samples

Lab

Agency

Chinle

Eastern

Fort

Dist. Lindane Date Sample No. milligram/kg Vat Name Sampled Index No.

10 0.000000 LeeToadlena Jul 14, 1992 D-10-10 92N1005 0.000000 Many Farms Apr 1, 1991 10.4 91N159 0.000000 Chinle (North of Chinle) Apr 1, 1991 10.6 91N163 0.000000 Fluted Rock Apr 18,1991 10.7 91N321 0.000000 Nazlini Aug 16, 1990 10.11 90N398 0.000000 Cottonwood (new) Jul 15, 1992 D-HM 92N1010 0.000000 Chinle (South of Chinle) Aug 16, 1990 10.3 90N394

11 0.000000 Black Rock Butte Apr 4,1991 11.1 91N167

15 0.000680 Becenti Jul 19, 1990 15.8 90N334 0.000320 Becenti Jul 19, 1990 15.8 90N335 0.000300 Standing Rock (well Jul 19, 1990 15.2 90N333

15A-27) 0.000270 Standing Rock (well Jul 19, 1990 15.2 90N332

15A-27) 0.000060 Littlewater (well 15B-35) Jul 19, 1990 15.5 90N337 0.000020 Torreon Apr 23, 1991 15.11 91N335 0.000010 Littlewater (well 15B-35) Jul 19, 1990 15.5 90N336 0.000000 Whitehorse Lake Apr 23, 1991 15.13 91N334 0.000000 Whitehorse Lake Apr 23, 1991 15.12 91N334 0.000000 Standing Rock (well Jul 20, 1992 D-15-2 92N1027

15B-1) 0.000000 Dal ton Pass April, 1991 15.7 91N189

16 0.000500 Thoreau (well 16T-350) Aug 8, 1990 16.4 90N377 0.000210 Church Rock Sep 12, 1990 16.1 90N470 0.000080 Casamero Lake Aug 31, 1990 16.6 90N431 0.000070 Rock Springs (well Sep 5, 1990 16.13 90N436

16T-333) 0.000010 Baca (old) Sep 10, 1990 16.8 90N443 0.000004 Tsayatoh Sep 5, 1990 16.12 90N434 0.000000 Pinedale Apr 11, 1991 16.2 91N186 0.000000 Bread Springs Sep 12, 1990 16.11 90N472 0.000000 Haystack Apr 22, 1991 16.7 91N330 0.000000 Smith Lake Sep 10, 1990 16.5 90N442

21 0.000000 Canoncito (no vat) Apr 22, 1991 21.1 91N331

22 0.000040 Alamo Aug 23, 1990 22.1 90N416

23 0.000040 Ramah (well 2; 6 miles Sep 16, 1990 23.2 90N440 southeast of chapter) •

0.000010 Ramah (well 13 at Sep 6, 1990 23.5 90N439 Pinehill)

0.000000 Ramah Jul 13, 1992 D-23-4 92N997 0.000000 Ramah (well 7) Jul 13, 1992 D-23-2 92N995 0.000000 Ramah(well 1) Jul 13, 1992 D-23-1 92N993

14 0.000200 Tohatchi Sep 11, 1990 14.1 90N457

laklfci. Concentration of Lindane in Water Samples

Agency

Defiance

Dist. Lindane No. Milligram/kg Vat Name

Date Sampled

Lab Sample

Index No.

Ft Defiance 14

17

18

Ft. Defiance 18

NPL

Shiprock 9

12

0.000600 Black Springs 0.000090 Black Springs 0.000020 Coyote Canyon 0.000000 Coyote Canyon

0.000130 Grease wood 0.000100 Greasewood 0.000037 Cornfields 0.000000 Greasewood

0.001150 0.000020 0.000000 0.000000

0.000000 0.000000

0.000000

0.000000

0.000000 0.000000

0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000

0.000000 0.000000

Crystal Sawmill Ft. Defiance Ft. Defiance (Blue Canyon Road) St. Michaels Ft. Defiance (Coalmine Road) Pine Springs

Oak and Pine Springs Road Houck Oak Springs

Cottonwood (old) Blue Gap Kitsilli Blue Gap Cottonwood Whiperwill Whiperwill Pinon Pinon

Whitecone Beshbito-Jeddito

Red Mesa (new) 0.000020 0.000000 0.000000 Sweeetwater (chapter

house)

0.000000 0.000000

0.000000 0.000000

Sheep Springs Shiprock 2 (well 12K -317) Two Grey Hills Sanostee (Big Valley)

Sep 11, 1990 Sep 11, 1990 Mar 13, 1991 Jul 14, 1992

Aug 7, 1990 Aug 7, 1990 Mar 12, 1991 Aug 7, 1990

Aug 16, 1990 Mar 14, 1991 Jun 18, 1992 Jun 18, 1992

Jun 23, 1992 Jun 18, 1992

Jun 23, 1992

Jun 23, 1992

Jul 14, 1992 Jun 23, 1992

Sep 11, 1990 Sep 11, 1990 Jul 25, 1991 Jul 26, 1991 Jul 22, 1991 Sep 11, 1990 Jul 24, 1991 Sep 11, 1990 Jul 26, 1991

Jul 30, 1992 Jul 30, 1992

Sep 11, 1990 Apr 8,1991 Sep 11, 1990

Jul 16, 1992 Apr 9,1991

Jul 16, 1992 Jul 9, 1992

14.6 14.6 14.4 14.5

17.4 17.4 17.3 17.4

18.0 18.3 D-18-14 D-18-6W

D-18-8 D-18-5

D-18-15

D-18-10

D-18-13 D-18-9

NPL-20 NPL-6 NPL-15 NPL-6 NPL-14 NPL-12 NPL-12 NPL-11 NPL-5

D-NPL-1 D-7-AS

9.5 9.1 9.4 •

D-12-6 12.13

D-12-5 D-12-4

90N459 90N460 91N117 92N1007

90N380 90N378 91N101 90N379

90N392 91N120 92N917 92N915

92N920 92N912

92N926

92N924

92N1003 92N922

90N453 90N451 91N1152 91N1159 91N1148 90N449 91N1150 90N447 91N1158

92N1080 92N1082

90N464 91N172 90N466

92N1019 91N180

92N1017 92N981

Table 5. Concentration of Lindane in Water Samples

Dist. No.

Lindane milligram/kg Vat Name

Date Sampled Index

Lab Sample

No.

12 0.000000 Shiprock 1 Apr 9,1991 12.2 91N178

1 0.000000 First Windmill Sep 15, 1992 1.3 92N1200

0.000000 Dick Slick Apr 15,1991 1.2 91N309

2 0.000010 Navajo Mountain Sep 13, 1990 2.1 90N479

0.000000 Shonto Sep 16, 1992 2.3 92N1206

3 0.000110 Proverty Tank Sep 15, 1992 3.5 92N1198

0.000090 Cameron Sep 12, 1990 3.6 90N476

0.000040 Coalmine Mesa Sep 12, 1990 3.3 90N478

0.000040 Tuba City Sep 12, 1990 3.1 90N474

5 0.000000 Birdsprings Apr 16,1991 5.5 91N314

0.000000 Dan Yazzies Aug 11, 1992 D-5-5 92N1109

0.000000 Sand Springs Apr 16,1991 5.3 91N311

0.000000 El Paso Aug 11, 1992 D-5-2 92N1112

8 0.000020 Do ma Dinnehotso May 2, 1991 8.3 91N345

0.000000 Doma Dinnehotso May 2, 1991 8.3 91N346

0.000000 Oljato Sep 13, 1990 8.2 90N482

Table 6. Dipping Vat Sites Not Found.

Agency District Vat Name Index

Eastern 19 Pueblo Pintado Ojo Encino

D-19-1 D-19-2

21 CanoncitoVat Canoncito Vat

21.1 21.2

23 Ramah D-23-3

Shiprock 9 Sweetwater Vat 9.3

Western 2 Navajo Mountain 2.1

3 Badger Springs D-3-1

5 Natani Area 5.6

LITERATURE CITED

Benally, C. J. 1988. A Pilot Analytical Study on Toxaphene Contamination in Soil, Surface and Underground Water Near DiDDina Vats on the Navajo Nation. 37p. «-«-PPJ.ng vats

Hirsatari, S.G., M. M. Mcchesney, A. c. Craigmill, W.L. Winterlin and and J.N. Seiber. 1987. Anaerobic Microbial Dechlorination: An Approach to On-Site Treatment of Toxaphene - Contaminated Soil j Environ. Sci. Health, p. 663-691.

Schneider, R.F. 1985. NEIC Pesticide Sampling Guide. National Enforcement Investigation Center. Denver, CO.

Toxnet Search. 1991. Environmental Protection Agency.

Pollutants?' EPA?9* Water~Related Environmental Fate of 129 Priority

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