OU-1_MW_Sol_Questions2_0002.pdf

Questions received and the Government’s Response:

1. We understand that MW-216 and MW-311 are not visible at the surface. Survey coordinates could provide for 100% success in finding the two “missing” wells, especially if the well vaults are missing for some reason and not identifiable with a magnetometer. Does a groundwater monitoring report or other investigation report include surveyed well survey coordinates?

No coordinates are available. BIA will continue researching reports for coordinates. These two wells are located inside and close to a perimeter fence. When a well could not be located, field personnel used hand tools (e.g., shovel, broom, rake) to remove soil and expose associated well monuments.

2. Well construction is needed to develop a plan of abandonment and costs. Is there a table or ‘as-builts’ available?

No as-builts are available. Attached are groundwater sampling data sheet with depth to water and well diameter size for help estimate costs.

3. Is there further guidance on the Public Communication Plan requirements?

The objective of this plan is to inform the public about the nature and duration of the work being performed in the OU-1 area. No additional guidance is required beyond basic awareness.

Communication will be kept simple and direct, such as posting flyers in the immediate vicinity of the work zone or distributing them to employees working nearby.

4. A copy of the closure report would be helpful.

See attached “Plugging Record” from a previous demo project.

5. Before abandonment commences, should we sample MW-216 and MW-311 if we find them and they are in operable conditions?

Based on the regulatory review, OU-1 LUST and associated well are deemed eligible for closure.

No additional sampling is required, and the existing monitoring wells can be decommissioned.

Groundwater Sampling Data Sheet

Project Name: Tuba City Groundwater Monitoring Project Number: ENJ6-009 (I'ask 001)

Client: Bureau of1ndian Affairs Well ID: .:..MW-~...;;-Jc,;:,5 __________ _

Location: Tuba City, AZ , / l ~/ t) U I 7 Date: 7 Iv _ ....__ ____________ _

Personnel: Ralph Waddington/Howard Small ,-,,\ <,:1· . , ,-- > Time: c _,,, ,._, ( /

~-9 ' Weather: Overcast Hot Warm Cold, ) mmg Snowing Other:

,.,,- SAMPLING DATA

q ;,? feet Below N side of PVC Depth to water Units Measuring point

Below Depth to product Units Measuring point

10 feet Below top of well casing Well depth Units Measuring point

Based on: Field Measurements Well Log

Well Diameter: 2-inch (0.17 gal./ft.) 6-inch (1.5 gal./ft.) Other:

8-inch (2.6 gal./ft.)

Casing Volume: --------.J feet of water x gal per foot = gallons

Volume Purged:

Purge Method· . Bailer ,....._

Well Condition: (satisfacto1/

Total Volume Discharged

Time (gal. or L) pH

C

Notes: ~ :J rlz i> ·' ,.,1_,,,, 11 ; 14- ,;_ J,::-k.A...

gallons

Pump

Other:

Dissolved Oxygen (mg/L)

Other/Material·

Specific Conductance (microS/cm) ft ~ -I')<, )__ L b-~j ,N

Temperature

(C) ReDox Turbidity

/J ..,,.___p

5.::. - /J I ,. TC-ufu?.,,.;.1- /f:?v.,;; /v(;j)/ ,e,_,,,.-..,,,,-e;.v--;,?t, /I. i) .,.-

}--leL.tA 1cJ,.,,..A -yv......___ -z.. ~ d 0/ .J ~.,_,,,,/---/.(),fl/'

Hexane Methanol istilled Water -, Analyses:

Sample ID: MW-15 Signature:

Loretta Morgan Highlight

Project Name: Tuba City Groundwater Monitoring

Client: Bureau of Indian Affairs

Location: Tuba City, AZ

Personnel: Ralph Waddington/Howard Small

Weather:

Based on:

WelJ Dfameter:

Ca.sing Volume:

Depth to water

Depth to product 10.15

Well depth Field Measurements

Clear Raining

_feet Units

Units feet Units

2-inch (0.17 gal./ft.)

4-inch (0.66 gal./ft.)

Project Number: ENI 6-009 (Task 001)

Hot Other:

Wen ID: MW-28 --------------

Date: ·7 /J O� 2- LJ/ 7

Time: J 3 JU

Cold

SAMPLING DATA

Below N side of PVC

Below

Below

Well Log feet of water x

Measuring point

Measuring point top of well casing

Measuring point

6-inch (1.5 gal./ft.)

8-inch (2.6 gal./ft.)

Other: --------gallons --------------- ------- gal per foot ==

Volume Purged:

Purge Method:

Well Condition:

Time

, 1,1,r ;( /'l_,f 51 1 i./Ov

Notes:

Sample ID:

Bailer

£Satisfactory)

Total Volume Discharged Kali- or L) pH

' 7-.) L.h3 ; � tJ b, .b.1

}, 0� b,bL/

MW-28

gallons

Pump Other/Material:

Other:

Specific Dissolved Conductance Temperature

Oxygen (mg/L) (microS/cm) (C) ReDox Turbidity

Ir c � {;J; j,-'Z- L.. j(,?,�'L- /6>-,.'J

J, ':JO Of::,7-.1 )�'lLj iSt:J.i I,, 7....?...... o,, � 3-z / 75··/c-/ / s a:;

Signature:

Project Name: Tuba City Groundwater Monitoring Project Number: EN16-009 (Task 001)

Client: Bureau of Indian Affairs Well ID: MW-32 -------------- Location: Tuba City, AZ Date: 7 /l.)UU<:.u1 7

Personnel: Ralph Waddington/Howard Small

Weather:

Based on:

Well Diameter:

Casing Volume:

Clear Raining

Snowing Hot Other:

SAMPLING DATA

Depth to water

Depth to product

10.8 Well depth

feet Units

Units feet Units

Field Measurements~

~0.17 gal./ft.) __)

4-inch (0.66 gal./ft.)

Below N side of PVC Measuring point

Below Measuring point

Below top of well casing Measuring point

Well Log

6-inch (1.5 gal./ft.)

8-inch (2.6 gal./ft.)

Other:

feet of water x -------------- ------- gal per foot = VolumePurged: _____________ _ gallons

Pump Purge Method: Bailer Other/Material:

Well Condition: (Satisfac~ Other: missing 1 screw

Total Volume Specific Di @scharged Dissolved Conductance Temperature

Time . or L) pH Oxygen (mg/L) (microS/cm) (C)

15""'!) V --- ' 1-5, b- ill? 7 ,/ {J 0.!.:>b6' / b, :>) I::,~ ~ I I, 0 b , .go -~. b'& l), ;/1(5 / b , .i"J { ~ --JS- j, :: b ,7 1 3 ,bb {) ~'-1 13 / b , 3 7

Notes:

mination:

Hexane Methanol Distilled W~

Cold gallons

ReDox Turbidity / 6 V,j/ Jb3,;J 11.> z.v

Signature: Z ~ Sample ID: MW-32

Client: Bureau qf Indian Affairs

Location: Tuba City, AZ

Personnel: Ralph Waddington/Howard Small

Weather, CZ

Based on:

18 ,lfJ

Depth to water

Depth to product

Well depth feet Units

Units feet

Units

Overcast Snowing

Project Number: ENI 6-009 (Task 001)

Well ID: MW-216

Hot Other:

Date: L/ /VOtJ "2...o I 7

Time: / b tJ tJ

@ Cold

SAMPLING DATA

Below

Below

Below

Nside of PVC Measuring point

Measuring point top of well casing

Measuring point

Well Diameter:

Field Measurements

- C::h(0.1� Well Log

6-inch (I .5 gal./ft.) Other: --------

4-inch (0.66 gal./ft.)

Casing Volume:

Volume Purged: _____________ _ Purge Method:

Well Condition:

Time t(arn

I Ir, I ..,-i h?..-0

Notes:

Sample ID:

Bailer

_'-..._ Satisfacto

Total Volume Discharged (e:al. or L) pH : '?....z; I�" L-.> ; . 0 bv '?I j t < b, .,---�

Hexane feet of water x gallons

Pump

Other:

Dissolved Oxygen (me:/L)

?-...,.;;-7 l., '8 ;:_' J 0 J.J

Methanol

8-inch (2.6 gal./ft.)

gal per foot = gallons

Other/Material:

Specific Conductance Temperature (microS/cm) (C) ReDox Turbidity hi, ,;3 c:; /f/,,3/ lb7,5 C) ... ::,- °31 I fi,,. J"J / "---,� \

015"2b I 'itdi. jljJ,c!/

Distilled Water

Signature: /c�=-=>-r / ;r

1-- =-_J_ ____ - _--l---+ _-_-___ - -------+-+ _-_-_-~~ ++ _-_-_-_-+-t-___ - -..---___ - 7---t_-.....__~ 1,_--~=:J

Sam~tamioation:

/Alcona:;:?' A~£

Client: Bureau of Indian Affairs

Location: Tuba City, AZ

Personnel: Ralph Waddington/Howard Small

Weather:

Based on:

Well Diameter:

Casing Volume:

Volume Purged:

Purge Method:

Well Condition:

Time / 2. J..,.f i 'd.._,:>.:f Ot r1..lf �

Notes:

Sample ID:

Depth to water

Depth to product 12.5

Well depth feet Units

Units feet

Units Field Measurements------

4-inch (0.66 gal./ft.)

Bailer

Total Volume Discharged (gal. or L) pH t-) -, ,, 41..1 I. 1J 1 J -5""3

;, � 7, '-17

Hexane

Overcast Snowing

Project Number: ENI 6-009 (Task 001)

Well ID: MW-JP 5 0 I

Date: ') /J/ d J l-- tJ .I' 7

Hot Other:

Time: r2.-J__!?

Cold

SAl"1PLING DATA

Below

Below

Below

Well Log

N side of PVC Measuring point

Measuring point top qf well casing

Measuring point

6-inch (1.5 gal./ft.) Other: --------

8-inch (2.6 gal./ft.)

feet of water x -------gallons

Pump Other/Material:

Other: missing screws

Specific Dissolved Conductance

Oxyeen (me/L) (rnicroS/cm) tJ. b.5 � '-5'8'-/ f{) 1 78 7, (?617

/J; 39 -:>, v-z.-6

Methanol gal per foot = gallons

Temperature

(C) ReDox Turbidity

J'3, &/ ').,./ 8. 'f

J 'ts,/� '-OJ,'/ I ff. L/ c//1.·3

Sigoatu.-e, ~~

Groundwater Sampling Data Sheet c o�� �--z-l/�J (( Project Name: Tuba City Groundwater Monitoring

Client: Bureau of Indian Affairs

Location: Tuba City, AZ

Personnel: Ralph Waddington/Howard Small

Weather: Clear

Depth to water

Depth to product

Well depth

Based on: Field Measurements

Raining feet Units

Units feet Units

Well Diameter:

4-inch (0.66 gal./ft.)

Casing Volume:

Project Number: EN16-009 (I'ask 001)

Well ID: MW-� _;; 0 z__

Hot

Other:

Date: / fV tJ J 1.,, 0 / 1

Time: f .b {)) e Cold

SAMPLING DATA

Below

Below

Below

Nside of PVC Measuring point

Measuring point top of well casing Measuring point

Well Log

6-inch (I .5 gal./ft.)

8-inch (2.6 gal./ft.)

feet of water x

Other:

gal per foot = gallons

Volume Purged:

Purge Method:

Well Condition:

Time 16/L/

I

Notes:

Sample ID:

Total Volume Discharged (gal. or L) t J.-.)

l, {

B ·1

A pH

7. ,�

Hexane g a Jl on s

Pump Other/Material:

Other:

Dissolved Oxygen (mg/L)

Methanol

Specific Conductance (microS/cm)

Temperature

(C) ReDox Turbidity

/79./ i7,11

/ 7, °17 ////.]

I l 7.,/{$ ,S-,09 ~ ~ o.:,-,s- I/~ ~ 2 1b'"L ?, I t o I ').1' , lh.- J-? I } C'J7 3 l 6.'f,,1 u,, .,,_, 0 - n ~ I '1 ~' a df ~

I

Sampl~tamination:

An · :

Sigoalu,e, ~

Client: Bureau of Indian Affairs

Location:

Personnel:

Tuba City, AZ

Ralph Waddington/Howard Small

Project Number: ENI 6-009 (]'ask 001)

Well ID: MW-303

Date: _L___;/V;___cJ_V __ 7""'"'--u_·· _)_7 __ _

Time: /t)' t/ S

Weather: Clear Raining

Hot Other:

@ Cold

Based on:

Well Diameter:

Casing Volume:

Volume Purged:

Purge Method:

Well Condition:

Time 11 oa ii tJ 7 ii 1 '-I

Notes:

Sample ID:

Depth to water

Depth to product

Well depth feet Units

Units feet

Units

4-inch (0.66 gal./ft.)

Bailer

(satisfac� Total Volume

Discharged (2al. or L) oH

? ,, 0 Ir "l...)

/, i) -, , 0/ i, 2-5 /P CJO

·Rur t 1w-1

Snowing

SAMPLING DATA

Below

Below

Below

Well Log

Nside of PVC Measuring point

Measuring point top of well casing

Measuring point

6-inch (1.5 gal./ft.)

8-inch (2.6 gal./ft.)

feet of water x

Other: _______ _ gal per foot = gallons gallons

Pump Other/Material:

Other:

Specific Dissolved Conductance Temperature

Oxygen (mg/L) (microS/cm) (C) ReDox Turbiditv , , qq 9, Z"':?7 /6.,. b/ ;)...C

I� ?-..1 '91 Z..."38 /.t, I�/ d.lPd:;

O;o// C f

,. 2..68 //.,,-60 2; 3,<>

---Sam P.l<>r. n,.""ntamination:

Hexane l I Signature:~~~

Project Name: Tuba City Groun dwat er Monitoring

Client: Bureau of In dian Affairs

Location: Tuba City, AZ

Personnel: Ralph Wad dington/Howar d Small

Weather:

Depth to water

Depth to product

Well depth

Based on: Field Measurements feet Units

Units feet

Units

Well Diameter: 2-inch ( 0 .17 gal.I ft.)

Casing Volume:

Overcast Snowing

Project Number: EN16-009 (I'ask 001)

WelJ ID: MW-304

Hot Other:

Date:_/;

__ . _,_/v'_d_J_7L�CJ>...._· � .__( ....L..7_

Time:

Cold

SAMPLING DATA

Below NsideofPVC

Below

Below

Well Log feet of water x

Measuring point

Measuring point top of well casing

Measuring point

6-inch (1.5 gal./ft.)

8-inch (2.6 gal./ft.)

Other: --------

--------------- ------- gal per foot = gallons Vo]ume Purged:

Purge Method:

Well Condition:

Time /!,/ 7 ,::;-qt,f '1 I) (t1!/}

Notes:

Samp] e ID:

Bailer atisfa�

Total Volume �

Discharged �orL) pH

.· -,_, t-i i t;/(J

I ; u {,, ;o/1-j I• 'L {' t,.�1

Hexane

'-IUD a 27 gallons

Pump

Other:

Dissolved Oxyg:en (mg:/L) o,qb tJ, .>-7 n ,lf 7

Methanol

Other/Material:

Specific Conductance Temperature (microS/ cm) (C) ReDox Turbidity

_5"",:?/U

I 7,, 0> i 1Jl-i,3

/,, '-17.s j 7 , f,"Cj / 7L/,. J 7/,l:.,)'7 / 7 ,. J-$ J 9 f(. 2-

Signature: z��

~.66 gal./ft.) ....___

Client: Bureau of Indian Affairs

Location:

Project Number: EN16-009 (I'ask 001)

Well ID: MW-J?2 � I/

Date: / fi/1/·,/ t.-- 0 J ) Tuba City, AZ -------------- Personnel:

Weather:

Based on:

Well Diameter:

Casing Volume:

Volume Purged:

Purge Method:

Well Condition:

Time i le./ � ; I 7 ''i i , .nO

Notes:

Sample ID:

Ralph Waddington/Howard Small Time: _.,_,//'---"3____;;;:>_-_____ _

��9 Depth to water

Depth to product

Well depth

Clear Raining feet Units

Units feet

Units

Snowing Hot Other:

SAMPLING DATA

Below

Below

Below

Nside of PVC Measuring point

Measuring point top of well casing

Measuring point Field Measurements Well Log

2-inch (0.17 gal./ft.) 6-inch (1.5 gal./ft.)

G;il co.66 gauw 8-inch (2.6 gal./ft.)

feet of water x-------------- -------

Bailer

/Satisfa�

Total Volume -

�arged � or L) pH

� {.., ";,. oS-

I, f) , ,. 03

·7,,oz_I ' :, Hexane gallons

Pump

Other:

Dissolved Oxn:en (m2/L)

{'); 'i?'i f)•§'O o,31

Methanol

Other/Material:

Specific Conductance (microS/cm) I I q 3<9 I,</ 2...'.6

Ip �15-

Signature:

Other:

gal per foot =

Temperature (C)

I '?j, Ji i$f,y7 i'?3,'t'�

Cold gallons

ReDox Turbidity / 7 5j ,'2.

I ">Ao

)') �, "Z.