ML071700772

Ground Water Supplement. Cover Through Chapter 2.3

ML071700772
Person / Time
Site:	Vogtle, 05200011
Issue date:	03/31/1985
From:	Georgia Power Co
To:	Office of New Reactors
References
+reviewedcja, AR-07-0924
Download: ML071700772 (50)

Text

GROUHD WATER SUPPLKKEBT TABLE OF COBTEITS 1.0 I rrRODUCTIOIJ 2.0 GROUHD WATER LEVELS 2.1 Construction of Observation Wells; 1971 to 1985 2.2 Water-level Keasurements 2.3 Precipitation Table

• 2-1 Observation Wells in Unconfined Aquifer

~able 2-2 Observation Wells in Confined Aquifer rable 2-3 Best of Observation Wells 42 Series rable 2-4 Water-level Measurements from Observation Weils Table 2-5 Augusta Weather Station--Konthly Precipitation

'lable 2-6 Waynesboro Weather Station--Konthly Precipitation

'lable 2-7 Blackville Weather Station--Konthly Precipitation Table 2-8 Hampton Weather Station--Konthly Precipitation Table 2-9 Savannah River Plant--Honthly Precipitation Table 2-10 Vogtle Electric Generating Plant--Konthly Precipe Figure 2-1 Observation Wells 1971 to 1985 Figure 2-2 Monitoring Program February 1985 Figure 2-3 Precipitation Stations Fleure 2-4 Annual Preeipitation Fieure 2-5 Cumulative Precipitation Hydrographs of Observation Wells 3.0 PERMEABILITY ABD POROSITY 3.1 Permeability 3.1.1 Constant discharge (pumping) tests 3.1.2 Constant-head tests 3.1.3 ralling-head tests 3.1 ** Laboratory tests 3.1.5 Grain-size analyses I ,

caoUlfD WATKR SUPPLEHDT

-rOLE OF COBTEIlTS (Continued) 3.2 Porosity Table 3-1 Permeability Test Data--Barnwell Sed~ents rable 3-2 Permeability Test Data--Blue Bluff Marl Table 3-3 Permeability Tests--Utley L~stone Table 3-4 Porosity Fisure 3-1 Permeability and Porosity Data--

Unconfined Aquifer and Karl Loss of Drill Holes with Permeability Data Logs of Drill Holes with Porosity Data 4.0 STATUS OF DRILL HOLES 4.1 Holes Penetrating the Blue Bluff Karl 4.2 Other Holes in the Confined Aquifer 4.3 Holes Drilled only into the Unconfined Aquifer or River Alluvium Table 4-1 Holes that Penetrate Blue Bluff Marl Aquiclude Table 4-2 Holes Drilled into Confined Aquifer Table 4-3 Holes Drilled into the Unconfined Aquifer or River Alluvium

1.0 IIITRODUCTIOIl The Iluclear Regulatory Commission, as part of its OperatiDl Permit review, has requested additional data on ground water condit.ionS at. the VOltle Electric Generating Plant (YBGP). This 'Ground Water SUpplement' provides the information requested in the Draft Site Evaluation Report (DSER, Dec. 4, 1984) Section 2 *** 12.5 and in the letters (E.G. &dens. . to D.O. Foster) dated January 22 and February 19. 1985. Additional information is also provided that is thought to be of assistance. rhe data is srouped under three subjects: ground-water levels; permeability and porosity; and status of drill holes. The information will be reviewed and summarized for inclusion in a forthcoming amendment to the Pinal Safety Analysis Report.

06351

2.0 GROUND-WATER LEVELS The "NRC has requested additional information concerned with the level of the water table in order to assess the design basis ground-water level.

In response, the following are submitted:

o Tabulated water-level measurements taken at all observation wells of the VEGP site, 1971 through January 1985.

o Hydrographs of the water levels measured in observation wells.

o Summary tables of all observation wells constructed at the site that identify when the wells were constructed, what the current status is (i.e., active, inactive, grouted, etc.), and other pertinent data.

o Monthly precipitation records of the u.S. Weather Bureau stations at Augusta (Bush Field), Waynesboro, Blackville, SRP, and Hampton for the period 1952 through 1983, and the partial monthly records of precipitation taken at the VEGP site during the period 1972 through 1983.

o Two figures are provided to show 1) the locations of all observation wells constructed at the VEGP site, and 2) the wells that make up the current (1985) ground-water monitoring program.

The history of the ground-water monitoring program at the VEGP site is complex. This is due primarily to necessary interruptions caused by construction activities, as well as the fact that both water-table (unconfined) and confined aquifers are being monitored. A summary of that history is submitted to clarify the monitoring sequence, frequency, and periods of measurements.

2.1 Construction of Observation Wells; 1971 to 1985

~ ground-water monitoring program was established at the VEGP site with the first exploration work in 1971. That program has included an array of observation wells open to the water-table aquifer . above the Blue Bluff marl, and an array of wells open to the confined aquifer immediately below the marl (in the unnamed sands of the Lisbon Formation).

Special observation wells installed include a nest of wells (identified as 42A through D) that provided wells open to the unconfined and confined aquifer immediately above and below the marl, respectively, and wells open to the marl itself. They provided data on the distribution of hydrostatic pressure across the marl. Other special wells include a series of short-lived construction "piezometers" that were installed in the backfill as it was placed around the Power Block complex. They were utilized to assure the water table in the backfill was deep enough to achieve effective compaction. All of the construction piezometers were destroyed upon completion of backfill except two, LT-1A and LT-7.

The initial array of observation wells installed during the exploration period 1971 through 1972 included several located in areas of plant construction. These were destroyed and sealed as required by the construction schedule, and when possible, replaced after the construction was completed.

The original observation wells reported in the PSAR (Table 2.4-3) included 16 open to the water table aquifer, 10 open to the confined aquifer, and two monitoring hydrostatic pressure in the marl. This array remained until July 1974 when site grading began, and excavation for the Power Block commenced. A majority of the wells were terminated at that time to make way for construction. All activity at the site was interrupted three months later, September 1974. Water-level monitoring did not resume until March 1979.

Resumption of construction, which began in 1976, required dewatering the Power Block excavation. The dewatering continued, uninterrupted, until March 1983. As construction progressed, more wells had to be terminated. Of the original observation wells ~pen to the water-table aquifer, only 3 remain intact currently, and of the original wells open to the confined aquifer, 2 remain currently. Other wells have been installed periodically to replace those destroyed by construction.

Currently, February 1985, there are 13 wells open to the water tab~e aquifer, including two within the backfill material adjacent to the Power

, Block, and 10 wells mo~itorir:!,~~~=.,.".~~.!!fi!!~~ ,u~!gl1; .f_~!:~,.~ed!ateIYbJ~~~ ,"the Blue Bluff marl. Additional wells in the water-table aquifer are planned, including two within the backfill material, adjacent to structures of the Power Block, and two to the north and west of the power block in undisturbed Barnwell deposits. Locations of these planned wells are shown on Figure 2-2.

2.2 water-level measurements During the period September 1971 through March 1972, water levels in observation wells at VEGP were monitored by Law Engineering Company at least bi-weekly and, commonly, more frequently.

The Design Basis water level was determined with that data. Water* level

' measur ement s since that initial period have generally been less frequent, except for a period December 11, 1980 through September 15, 1982 when daily measurements were made in two wells.

No water-level measurements were made between April 1972 and April 1973 when Georgia Power Company personnel commenced monitoring on a quarterly basis. Monitoring was again stopped July 1974 when site grading and excavation for the Power Block was commenced.

Monitoring was not resumed until June 1979, at which time quarterly measurements of all existing wells was again initiated. Daily readings 0635g

were made in observation wells 800 and 802 during the period December 11, I

1980 through September 15, 1982 as part of the monitoring conducted for placement of the backfill around the Power Block structures. Temporary wells were installed in the backfill as it was being placed to monitor the saturated level and assure proper compaction.

Water levels in observation wells of the unconfined aquifer after June 1979 (including those in the backfill) were influenced by construction dewatering. The dewatering of the Power Block excavation was in effect from June 1976 through March 1983.

Several of the water-level measurements to be submitted are not reflections of the water table. Characteristically, this occurred where infiltration of silt and sand into the well casing had progressed until it filled the casing to above the screened interval. The water level measured in the well would then be considerably higher than the water table outside the well casing. Until the silt and sand was removed, the well cleaned, readings of water level are not a reflection of the water table. Such readings are listed in the tabulation, but are noted with an explanation of why they are not representative of the water table.

The water-level measurements taken in the temporary wells are not submitted as they are not a reflection of the water-table, but of moisture control maintained for proper backfill compaction.

2.3 Precipitation Monthly precipitation data from 5 stations within the vieinltJ of the VOltle Plant Site is summarized in Tables 2:,5 through 2~9 for the 32-yr period of 1952-1983. Available data at the plant eite (1972-1983) is shown in Table 2-10. Plant site and the stations are shown in Piaure 2-3.

Annual precipitation totals are plotted in Fieure 2-. for the concurrent period, 1952-1983, for five stations. Plots of the cumulative annual totals appear in Pisure 2-5 for each station.

YOltle Plant site data, shown in Table 2-10 is inadequate to characterize the annual and monthly precipitation for the site: Rather, a regional averaae based on the stations in the vicinity would be an adequate I index. As apparent in Fisure 2~5, the five nearby stations eXhibit similar characteristics and trends.

)

(

OO ~"OB N

(

)

N 80-/*00 205 N 75+00 g ~~

B Proposed 8S0S ~

MU-2~215) ~ '"

~ ~

DETAIL @ PLANT. SiTE 100 o 100 200

~.~ *

(240) - SCALE IN FE.ET EXPLANATION 130138 Proposed additional observotion well

,\ ' (220) (Locotion approximate)

\

\ Limit of Unconfined aQui~er observa,tio n well.

exCOVOtiOIl 803A

. Confined aquifer observation well

( TERTIARY) .

8804 *Confined aquifer w~lIteR~T"C~9~)

(240)

NOTE:

(220)

Site grading generalia:ed from OWe.NO.

i CX 2046V003. Within graded ar~a.

opproximate ple1/atiPns llhoWIl in.

"~'.\~

parentheses.{2l~),****.*

,\ '\

\ \.\

\ 'i

\

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REFERENCE:

(

I\IOrod by Clyde N. fl'd<'.

H... co.~ L..ndin, ""j~j 1_" .. pllI~ ....110*

A"kllllwl!lll'$.F<IlI25!7' 400 o 400 BOO \200

/ StALE IN FEET Contour intervola 5 ft. ond 25 fl.

/ f 8ECHTEL

. AMGIUS I / ~O$

/ GIEORGIAPOWIR CoMPANY'" i

/

/ ALVIN W. VOGTI.ENUCI.IEAR PLANT

'MONITORING PROGRAM

, FEBRUARY 1985 ",

+

w

)

SCALE:

FIGURE 2-2

TABLE 2-1 OBSERVATION WELLS IN UNCONFINED AQUIFER Ground Top of Depth HISTORY Surface PVC Top of Well Installed' Current Coordinates E1ev.(I) Elev.(2) MarI(3) S~reen Depth(3)

No. (YR) Status N E (ft) (ft) (ft) (ft) 129 1971 Active 8856 9576 215.9 215.3 77 92 - 97 142 1971 Active 8283 8262 231.2 224.5 92 85 - 95 179 1971 Active 9059 7779 274.8 275.9 130 111 - 131 800 1979 Active 8850 11011 213.7 215.3 83 69 - 89 801 1979 Active 7656 10733 212.8 215.8 82 62.5- 82.5 802 ]979 Active 7201 10199 215.8 217.7 91 69 - 89 803A 1979 Active 7085 8898 218.3 220.3 82 57 - 77 804 1979 Active 6597 8227 224.1 226.1 87 60 - 80 80SA 1979 Active 6672 10403 232.7 236.7 124 95 - 115 806B 1980 Active 8821 9726 214.8 215.8 77(4) 55 - 65 807A 1980 Active 9047 9835 213.6 218.0 77(4) 65 - 75 LT-IA(5) 1979 Active 8388 9300 (6) 206.9 69(7) 65.4- 75.4(8)

LT-7 (5) 1979 Active 8151 9323 (6) 200.4 63(7) 58.2- 68.2(8) 124 1971 Inactive, 1979 6896 9527 260.2 259.9 128 160 - 170 (buried) 138 1971 Grouted, 1985 8000 8500 225.2 225.1 87 5 - 82 140 1971 Grouted, 1985 7846 8702 222.4 223.5 89 81 - 96 141 1971 Grouted, 1985 7860 8293 230. ,4 223.6 97 90 - 100 143 1971 Grouted, 1980 82B3 . 8738 224.5 225.0 81 78.5- 88.5 145G 1971 Inactive, 1974 7792 7063 218.7 219.7 82 72 - 82 (buried) 176 1971 Inactive, 1974 7117 11423 196.4 196.9 77 65 - 75 (buried)

(0563g)

• *w TABLE 2-1 (continued)

OBSERVATION WELLS IN UNCONFINED AQUIFER Ground Top of Depth HISTORY Surface PVC Top of Well Installed Current Coordinates Elev.(l) Elev.(2) Marl(3) Screen Depth(3)

No. (YR) Status (ft)

-N- -E- (ft) (ft) (ft) 177 1971 Grouted, 1980 8560 178 1971 Grouted, 1978 9958 10865 213.0 213.0 79 60 - 80 8994 240.4 240.5 89 71 91 243 1972 Grouted, 1985 9154 8618 213.0 225.2 71 60 80

'/.44 1972 Inactive) 1979 (buried) 8835 8859 212.6 213.7 72 51 - 71 245 1972 Grouted, 1978 8501 9917 207.6 209.0 71.5 52 92 247 1972 Inactive, 1972 5750 5424 211.3 82 70 - 80 (buried) 248 1972 Inactive, 1972 7469 5111 166.8 70.3 60 - 70 (buried) 249 1972 Inactive, 1979 8826 10154 193.0 194.0 57.9 47 57 (buried)

Notes (1) Elevations shown were determined at time of drilling.

(2) Elevations shown are current or latest determination made prior to well abandonment.

(3) Unless otherwise indicated, depths shown were measured from ground surface at time of drilling.

(4) Approximate depth based on log of well 129.

(5) Observation wells located in backfill.

(6) Ground surface continually changes as backfill is placed.

• ( 7) Additions to ris~r casing as backfill is placed have been added to approximate depth from ground surface at time of drilling based on top of marl contour map, FSAR Figure 2.5.1-30.

(8) Additions to riser casing as backfill is placed have been added to depths measured from ground surface at time of drilling.

(0563g)

TABLE 2-2 OBSERVATION WELLS IN CONFINED AQUIFER Ground Top of Depth HISTORY Surface PVC Bot. of Well Installed Current Coordinates Elev.(l) E1ev.(2) Mar1(3) Screen Depth(3) .

No. Status (ft) (ft)

(YR)

N E (ft) (ft) 27 1971 Active 8622 13931 210.0 209.0 148 180 - 190 29 1971 Active 9975 12392 193.0 193.4 126 200 - 210 850A 1984 Active 11723 10494 225.9 227.8 135 169 - 179 85IA 1984 Active 8868 7066 262.7 26'l.3 195 269 - 279 852 1984 Active 5993 13380 200.7 202.1 153.5 199 - 209 853 19R4 Active 11020 9204 227.6 229.1 145 195  :... 205 854 1984 Active 9899 7917 236.8 238.3 153 197 - 207 855 1984 Active 7159 13951 '-18.0 219.4 173 219 - 229 856 1984 Active 4927 12558 186.7 188.1 155 176 - 186 24 1971 Grouted 7850 9092 216.0 216.4 145 210 - 220 26 1971 Grouted, 1984 5963 15197 203.0 203.8 158 190 - 200 31 1971 Grou ted, 1984 8764 11237 211.0 216.8 151 200 - 210 1971 Grouted, 1984 9784 9572 214.0 217.4 139 200 - 210 32 33 1971 Grouted, 1984 11834 10864 238.0 238.6 157 210 - 220 1971 Inactive(capped) 12180 10846 90.5 (4) 90 - 100 34 86~0 lOlA ]971 Grouted, 1974 7950 9515 210.6 211.7 138 190 - 200 121 1971 Grouted, 1985 10467 12195 88.8 -- (4) 78 - 88 135 1971 Grouted 8992 8742 200.5 201.3 124.8 160 - 170 144 lq71 Grouted 10403 12124 103.2 103.2 38 38.5- 48.5 147 1971 Grouted, 1978 7975 8471 226*.2 227.4 152 280 ~ . 300 (05fi2g)

'fABLE 2-2 (contlnued)

OBSERVATION WELLS IN CONFINED AQUIFER Ground Top of Depth HISTORY Surface PVC Bot.. of Well Installed Current. Coordinat.es Elev. (1) Elev. (2) Marl(3) Screen Depl:h(3)

No. (YR) status _N_ _ E_ _.ltl.L (ft) (ft.) (ft.)

175 1971 Grouted, 1985 8386 7363 233.1 164 155 - 165 I (1) 181 1971 Inactive (buried) 8144 6833 258.3 194.5 190 - 200 246 1972 Grouted, 1984 10532 6553 210.4 213.5 119.7 220 - 230 (1) Elevations shown were determined at t.lme of drilling.

(2) Elevations shown are current or latest determination made prior to well abandonment.

(3) Unless otherwise indicated, depths shown were measured from ground surface at t.ime of drilling.

(4) Well located in channel of Savannah River, marl not present.

(1) Revised 4/24/85

TABLE 2-3 NEST OF OBSERVATION WELLS 42A, B, C, D, AND E Ground Top of HISTORY Surface PVC Marl l-lel1 Installed Current Coordinates Eiev. (1) Elev. (2) Interval (3) Screen Depth(3)

No. (YR) Status N E (ft) (ft) (ft) (ft) 42A 1971 Grouted, 1974 8380 9535 210.6 213.0 72 - 137 140 - 150 42B 1971 Grouted, 1974 8386 9544 '210. 4 72 - 137 120 - 130 42C 1971 Grouted, 1974 8398 9563 210.0 72 - 137 80 - 90 42D 1971 Grouted, 1974 8403 9571 209.7 212.7 72 - 137 60 - 70 42E 1971 Grouted, 1974 8408 9580 209.6 72 - 137 45 - 55 NOTES

, (1) Unless otherwise indicated, ' elevations shown were determined at time of drilling.

(2) Elevations shown are current or latest determination made prior to well abandonment.

(3) Unless otherwise indicated, depths shown were measured from ground surface at time of drilling.

(0576g)

TABLE 2-4 WATER LEVEL MEASUREMENTS FOR OBSERVATION WELLS I

~ater Lev~:5 fc~ well Z4

.J CT =S ue -I'" ;. ~ - 1 ; "7 1 121.5C 26-fJd~ Y-l ~71 122..70 lS-JUN-l,71 116 * .30 17-JUN-l~71 117.20 16-JUN-l o~71 113.30 18-JUN-l~71 111.20 2 2 - J UN - 1 '

j 7 1 117.50 23-JUN-197:i 11S.:'C Ol-J\.JL-l~71 116.2G 14-JUL-1371 ° 117.:~

~1-JUL-l.,71 117.:] ,;

26-JuL-l~71 117.3 ;~

04-AUS-! ~7.J. 117.00 11-AUG-l~71 117.50 1 0 _ oA J '" -1 0:' 7 l 112.20 25-AU;-1371 115.20 Ol-SE?-1=J71 117.BQ Oo-S~~-1,71 117~:O 15-SE?~1971 117 * .3C

" 3 - S :: ? -1 o~ 7 j, 117.3G u6-QCT-l;7~ 117.60 23-:CT-l:;;71 117.7C 02-NGV-!::71 ll7 * .20 1 o- ~~ uV-1 ~ 7 1 1~7.iC 17-t\GV-l:,71 116. :~J 117.0C Ol-G=C-l:'71 J.17.3~

J7-:'::C-1371 117.~ *,j 14-:::-1:'71 .L..;,.J..;

,~ ....

23-:::C-157: 1:;.50

~~-:=C-197~ 11S. :Jj OS-J~\-1~72 11~.0 ~

1 2 - J ~ i" - 1 ;, 7 ~ 0 :1 *:.2 :~'

1 7 - J ~ io~ -! j 7 2 2 5 - J ~ ;.~ - 1. ~ "7 2-J3-F::"-1~:~

'J j - F- = = -2 ~7;;'

23-F=;;-1:;72  : .: .:'

~ .L "':

• G~ - r* ~ i: :;: - 1 ~ -: :.

16- M~~-1~72 lB-A?~.-1.,7 2- ~:i.::.7 0:J o1 - i"~ A Y - 1 ~ 7 .:. ~2::.7C 30 -~'I~ Y-l -; 7 3 11 ? * .:. c lQ-JU~-l ~7::

13-~C T-1 ~7;.

~

L .L ( *

~-.

I '...

o3 -

I 1\:.; OJ - 1~ 73 117.3C 09-JcC-l~7:; 11:'.:0 o7 - J ~  :,J - 1 ; 7 4 11 ~~

• 3 C

water Levels fer Well 24 (C')ntinued)

N:T2S 1 0- F E ~ -1 37 4 " 121.0C

,3-MA~-lj14 122.00 17-APR-l~74 117.i0 I

~ater L~vels fer w~ll ~6 20-AP~-1.,71 1.3:'.90 (1) 29-A?k-1971 lOS.50 06-MAY-197: 106.70 2 6 - i'" ~ Y -1 9 7 1 15-JUi*~-1~71 10Z.10 16-JUN-1911 102.20 17-JUN-1971 101.90 la-JUN-1,;il 102.60 2.2-JU~-1::"71 102.20 2 3 - J i..J ~.j - 1 '5 7 1. 101.90 Ol-JUL-1971 102.60 14-JUL-1S71 lOl.SO 21-JUL-1S71 luZ.~O Z3-Jt.:L-1971 101.50 O~-AIJ '~-1;7:

ll-AUi:'-1971 lel.lO 16-AUG-197~ 103.90 25-Au~-1~71 1l,j2.70 01-S:~-1571 l02.~O 02-S:?-1971 102.10 1~-SE~-1~71 102.10 Zj - 3 ~ ? - 1 ~ '7 1 1 ..' t. * " ...J 23-CCT-l;71. 1J3.10 oZ- i... 0 V- 1 :, 7 1 lJ2.~'J lO-NDV-I~71 l02.~G 17-NOV-1C,71 lJ2.3C Z3-~*~CV-l  :;71 l02.7G Jl-:E:C-l~71 10':'.10 u7-~=:-1'171 1C4.~J 1,+-:EC-l~71 1()6.~G 23-C:C-l'971 Ij~.7C 2~"':=:-1';71 10:;. :-:J o 5 - J ~ t,.- 1 :, i Z lei * .?:,

1 ~ - JAr,.- 1 :, 7 2-

~ ~-

J,.; .::; * :  :....

~;-Ji;.. i~-1~72

~. ~  :. (\

• J I

• oJ ..

lC,7.~*C 1 ;J7.6';

~-F::-l~72 1:7.::0 23-F-E3-1'~7 Z J 2- ~-'i ,l ~ - 1 :, 7 2 U'3 - M~ K - 1 ~"7 ~

l ,:>-~~A ;;-lj7 ~

103. :c

• , v. ;- * ::

21-MA~-1~72 la-AP~-1:'72. -c 3 0 - r-~ A Y- 1 ~ 7 ~

2.7-JUL-l:'73 13-GCT-l~7;' 104.20 .

o3 - t.. G'v' - 1 ~ 7 ; . IG~.O(j

~~-C=C-l~73 103.3J

07-JkN-157f. 107.20 o7 - J A ;.J -: -; 7 " 107.2C lO-;:~S-19i4 10Q.10 2.3-tJlI~~.-1 ';74 lO~.~O l1-Ar :<-1 '3 7 4 10S.:30 C2 - J U r*~ -1 '3 7 :.: lC6.2C

()7-JUL-197~ 10~.40 25-NGV-13"7., 103.50 J2-J~~~-1~EO 102. ';0

~~-~lA~-l Ses 0 1 C*: * ~ D 2 7 - J u ;~ - 1 ; E 0 l02.7 *J 27-S::?-1,3C IJ1.-+C

' *3-J=C-l '~fG 1[';1.,,- '.)

2o-r~A ~:-1 ~21 1v1.'10 2~- J l.H'~ - 1~: 1 100.40 23-M~ ~-1 :;~,;; 101.60 1 5 - J U~~ -1 S :: 2 lJ').4G l:-S=P-l; ;~2 1 Q 0 * ,~ C 11~:=C-l~~2 10 *: * '3 0 o3-!'1M ;:(.~1;; ~ lC:.~C 2 2 - J LJ ~ .~ - 1 :, ~. ::.

I" 21-S=?-1~c3 12-:~C-l-;:3 lJJ.?G 12-M~~ .-1 ~S~ 10:-. '?C 1 1 - J U f\J- 1 ~ S .;

NOTE:

(1) Initial measurement after construction and testingJis not considered valid. Data not plotted on hydrograph.

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> ':> ::l  ::> :::>  ::>  ::::J .lJ . LJ IU ' U (J \....) (') CJ c.) 1".1 IIJ IIJ III iU !II -1: -,.( <:1 .. { 'U I!.J III -:{ <"'{ .. ::t 0;1: L\.. o. ,-t .::> 111 U .:'1

<t ....'""1 ::-..J ::::l :.l J J ~") .:J .It

-.: >.: -, -, -, -, - , --, .., ..., - , . , <..( e:t c..( ...f. t/t

... Vl V) \/) C) Cl Z  :~ Z. :!'~ .:) ,'..) ("J I"") ':l ..., ...., ~ ...., IL II. it- ~~ -i: "Y: ;~ c:( -:;1 ~: ..., 4/') t.:) ., I)

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• I I , , , I I , , I , " ,

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r'J 0 0 ..... (\')'"")'-.)n o f"- f") .--4

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w?~er Lev~ls for w~ll 27 CCo~tinued) 07-JAi*..-1974 :4.10 10-Ft.3-1;'7~

23-MA~-1 '174 80.10 17-~FR-l:;7.;, . 87.50 13-AJG-1974 &4.40 11-S:?-197'- 62.50 07-JUL-l~79 31.61 26-N:V-19i5 22.20 2 7 - J J N -1 .; s G 52.5Q 2 7 - J iJ ;~ - 1 ., 3 J 62.6C 2o-JUN-lj~C c2.:0 30-JUN-l;:O 82.60 2 7 - S: ? -1 9 *3 G :3 2 . 3 0

,7-S:P-1S80 3Z.30 26-NGV-l;3 :' 62.1~

25-:EC-lS8J el.1e 51.1J

,6-M;'~\-1";2,1 52.Sa 3 0 .:.. J U t~ - 1 " : 1 ~O.:.O L3-~~ ~-l ~ *3 2 el.20 15-JUN-l ;82 . 6 C* 00 :f:P b 15-S:?-19S2 61 * ; C ~J.S Il-D=C-l;:l 74-.SQ

.j b - i-1 A K - 1 ~ ,~ 3 -1u.i)(J 22-JUN-l'; *; ~ ~3.6C 21-SE?-1 '3= :; 75.2C 1 2 - :: : I~ 1 ~ ': :3 1 3 - M~ ~ - 1 ~ :. ...

Il-JU\-l ';:*~ j C

• 7; y"CO 11 - J U ~J - 1 .; ~ 4 50.7S l ,b-SEP-l  ;' .~~ ~1.1~

1~-S::~-1;S4  :~ 1 . 1 4 7;.7"1 13-:~C-l~S4 7 ~

• 7 '1 04.-;F==-1';25

w~ter Levels for w~ll 2~

Date 2S-AP~-1971 10;. 30 16~.'

06-MAY-l~71 105.0C 26- ~, A Y-1 .., 7 1 lQ3.i.O lS-JUN-1;71 107.10 16-JUN-1 '~71 1~7.Z0 17-JUN-1311 IG7.~O lo-JuN-1971 106.:;0 Z 2 - J U r~ - 1 '; 7 1 IJc,.OG loS'O'C 23-JLJN-1971 ~1.50 Ol-JUL-l;71 lOD.SO l~-JUL-l~;l lC;2.~:l 21-JJL-1371 103.30 Z6-JUL-1971 102.30 J4-AUG-l~71 lOl.5J l1-AU~-1371 .., J... 1_ * ~'l

..,I ""

lo-AUG-l ';71 101.:0 23-AUG-1971 Ol-S=:;'-1~71 lOZ.lJ J8-SE?-1~71 lC2.QJ 15~SEP-1S71 101.70 2o-S=~-1~71 lJ2..cv I

23-CCT-l'371 j '~

• CG 02-NJV-l '; 71 ~ !::.~~ q ~:~

j, ' 0 - ~~ wv' -1 ~ 7 1 ~t-.7:'

17-f\::V-l =}7:' ",- cr * ~

u.....

23-r"4Gv-l';71  ;~.70 Jl-w=C-::',71 07-:::-1571 1"-G=C-l~71  :>"i lit - . - ~ '"

....J ~

• 23-::=C-1;;71 lC~.5G 2~-:=C-1S7~ ~S-.~O 05-JA~-1;7':

l2-JA :J-l:'7 : 1 c 1 * .: c ~ G\.~

1 ., - J ;. ;\J - 1 7:: .;. lC::. :C 2: 5 - J .: r,~ - 1  ::"7 .:

J3-FE:::-l~7~

~ <>>

i I

I.,,;

O-;-F=':-:~7: 1 8 : * -: .: 1()~ *fD 23-Fc:~-1~7:' lQ3.~ ':

l ':':.':'~ lot ./....

o~ - ~", ~ ~ - 1 =: 7 ~  : ~:.

• 2 C' 16- ',1\ A~- 1 ~ 7 2 21- ~i ~ ~ -1 .; 7 :. 1 01.~C lc-~P~-1~7~ lCl.~~ IOl.?

26-A?;<-1'172 1 C;. * .? ']

.3 0 - ~.. ~ y -1 ., '7 3 2.7-J~L-! ;72 1 -':CT-l~72 '1 ; * '~ LJ O* -~.; CV-I ~ 7 3 'j

• 4 C J -Ci:C-1Si73 ~ .20 o -JAN';'1~74 lli .70

W~ter LEvels fc~ WellZg (Continu~d) c- i e v r t. a c n

~.

---

~--_ .~

lO-FES-1974 ~~.zo 23";'MA~-1;74 ~9.5J l1-APR-l ';74 13-AU~-197~ .~ ~ .00 11-S~~-1~74 37. 9U 26-NGV-1975 ;7.30 11-JAN-15~J ;6.50 2S-M~~-1;'?C 104.00 27-JUf\e-l~~C ~6.;J 29-L:E:C-19~O

.;:a-M.~~ -1'; '3:i.

2 3 - JUt ~ -1~ 3 j, ';".0 *)

L 3 - MA Po - 1 .; *3 2 ~4.7Q 15-JUN-1S3~

15-S~?-1?S: ~4.~G 11-J=C-l~S2 ~3.5*0 06-MA~-1933 32.::0

- c:

..... :.u r: .- .

~

15-:CT-ljE5 12-:~C-l-:'=* :  ;::'.70 12-!~~K-l';:~ .,Z.J7 ll-JUN-15:~ ": ... * '-: I",

18-S':P-l; '--

l~-:,:C.-l:' .. ":- z- * :::>--;

04-;:':~-1';'  ;;

~3ter L~v~15 fer W~ll 31 Ol-JUL-1571 101.40 14-JUL-l~71 105.20 21-JUL-1971 107.10 2o-JUL-1971 107.30 04-AUG-19il 107.10 11-AUG-1971 107.60 13-AUG-1971 101.90 25-AU~-1971 10S.60 Ol-SE?-1571. 103.40 J 6 - S : ? -1 .~ 7 1 IJ7.60 1 5 - S =p -1 '3 7 1 107.60 30-S:?-1~71 lG7.-.G 06-;JCT-l~71 107.10 23-8CT-l~71 105.60 02-NGv-l.,71 lO~.3C lO-N~V-lj71 105.eO 17-~:V-157! i os vs o 23-NCV-l'ii71 u1 - D ~ C-1 37 1 . lOt*.30 J7-:;:C-1971 106.20 14-:EC-l~7:

2 3 - J eC- ~ .~ 71 10S.62 103.;0 OS-JA~*~-1;7 2 105.30 12.-JA"'-1~72 107.3-0 19-J~\-19"': 1:0.70 0.3-FE3-1~:2 111.70 09-FE=-lj7,2 ~ ~ '1 1 ...... :.

.~.

23-r:c~*-1 ~7 2 J 2 - ~-1 ~ ~ ; 7 .2 lJE..~C J 1-t*1A~-1';7 2. lC:*.30 lo-~A;'-1~7: 1",,~.~0 2 1 - t*i ~ ~ - 1 ~ '7 :

13-~P~-~972 2~-A?;(.-1::7 ~ 1:Z.1C 30-~,~ Y-I ~7 ~  :~}.70 27-JUL-l~7:;

13-CCT-l~7; o3 - v-:. :, t :

~~ C; lJ7.7:*

.J..,

~ *-~-'~r i.,. _.......

~: - '""';'

. ~ ...

Q7-J"'t~-1-;7~ 11 C

• 1 .~

1J-;=~3-1~7,+ ~0~.5;J 2 3- i~ ;.. ; - 1. ;. 7 - l'J:, * ? C 17-AF-~-1:,7':' llC;. ,~-J 15-AUG-l ';74 lC7.1~

11-S:;'-~::'7~

oj - J U i '~ - : ~ 7 .;

1. -:

~ _.

4 * '; L J 7 - J J L - 1 ~"7 .~ 1:)'S.~1 07-JJL-:~79 1 0 c * '; 7 .

Z6-t-J~V-l  :'; 7 ':, lJ7.2C

~ater Levels for well 31 (Continu~c)

Dat *a 11 - J At~ - 1 ; 3 0 1J6.5';

24-JAN-l~3C 1J~3.06 23-MAR-l~S.o 111.3~

-Z 7 - J UN- l SE 0 107.10 27-JJN-lgS0 107.10 Z7-JUf\-19~O 107.10 28-JUN-1920 107.10 3C-JUN-19EO 107.10 27-SEP-l';E'Q 10:.

• 1:1 27-S:;?-li3C lC3.1C 26-NaV-l;2J

,-;-CEC-1520 105.20 2-;-D=C-l~EO 105.2C 2a-MAK-l~51 lC3.40

~9-JuN-l;:1 3 0 - J U I~ -1 S 3 1 103.-:;0 10~.60 lS-JUN-1922 103.50 15-S=~-li2, 10:.12-ll-C:C-l~~':'  :'03.50 16-:EC-l~52 103.5 'J 06-r-J~~-15:.3 22-JU~J-l?~3 104.721 Zl-SEF-1S33 (1) l:'-Jt:C-l~~;* (1) 12-MMP-l~:,+

.o~. c v""""

.~

(1)

NOTE:

(1) Data not valid. Data not plotted on hydrograph.

Well damaged during construction of cooling towers.

~3ter L-:v~ls fer W,all 32 Oa'te clev::tion ~~: T: S

.--._---~.-.-.~- -----_.-_-- --~~-

15-JUN-1571 104.40 17-JJN-1971 107.60 18-JUN-1971 107.40 22-JUN-1971 107.40 23-JUN-137j, lJ7.:- G Ol-JUL-l "=j71 10~ *.9G 14-JUL-l"~il

• 1~*3.~ O 21-JUL-1971 10 4 *. ~ J 26-JUL-l:;71 lO6.~ O 04-AU~-1371 10~."C 11-AUG-l~71 1 *0 :

• j G 1 5 - AUG-1 '? 7 1 107.20 2.5-AUG-lj71 10 *5 .4 C Ol-S:?-1;71 lO7.4C OS-SE?-1971 107.20 1 ;-5:?-1 ';'71 la7.2w 30-S:P-l .;7 1 107 *.0 0 06- 0CT-l~71 lO6.2C 23-SCT-1S71 IJt.1O OZ-~~uV-1971 105.90 l O-NGV-197l ._, 1v: .4C 17-N2V-l .., I ...

103.6 0 23-N2V-1971 lC5.7C Ol-JcC-1S7j, 106.2.J 07 -'S:; C-1 ;71 l.Q6.~O 107.60 14-0i:C-l~71 23-:=C-1 .,.J,. - ..~

lO b.60 29-JEC-1971. 102.7 0 05- J A~'~ - 1 =;72 107.7 0 12-J~N-l~72 1Q7.2 1~

1;-J A\l-1372. IJ.: .20 26-JA N-197~ 1 r-\J c. . . t . ,-I 03-F:3-1 37 ;;. Ij,C. *~ :

11 'J.7C

~

O~-r:E3-1 -; I "

23-F~3-1  :;1 ... 1 ...* ,;. . ~ ....

J 2 -t-i~ R- 1 .~ 7 to lGe * ; 0 o ~ - JvL~ ~- 1 9 7 :: 1 CS * ~

,,"\

'.,.J 16-MM~-1 ~7i. 103.30

..,.... , r 21- r~A ~-1 ~7 2. ..* u;O ..... \..j 1 C' - ~ p ;< -:. '-:, 7 ~ 1 G3 * ~ (!

26-AP;;-1~73 11 ~

• 50 30-~~~ Y-l:;7:,  :. J :: .70 27-JJL-1 ~7 "3 Iv ,. 7C 13-CC T-l '~7 3 1 J :; . 4 0 I

03- hn:v-l ~- 7. :;;-. lCS. OC

=

J ~ - J C- : '"j 7 ~ 1 04 * . .1 07-JAr~-1 97 ~ lG7.4 ~

I lJ-FEc-l~74. 1J1

• 6 J 23-MAR-137':" 102.4(:

17-AP;;-1974 10::*

• 0C

~ster L~v:ls for Well 32 (C~ntinuG-d) lS-AU *:;-1974 lO~.9Q 11-S=P-l~74 106.90 07-JUL-l~7S 107

• D u" 24-J~N-19?G 106.40 2.5-M~R-l"~O lQ~.7.0 27-JUf\;-1*9EO 107.10 27-Sc?-1;;O 103.20 Z;-CEC-1SSO .104.10 2S";'MA~-1~el lIJ4.4.J 2 .~ - J U N - 1 ; .: 1 103.30 105.00 1 5 - J Ui~ - 1 =3 2. , n -;. ': r*

15-SE:°-19:~ 102.10 11-':;EC-1ge2 1 *J7.0J 2 2 - J U f-J -1 g e3 103.00 15-ScP-l S *3.3 101.7 -J 11-:=:-1~:3

• lO~.40 1 2. - ~'1 AQ - 1; ?4 1:J7.~J 22-MA~-1554 107.60 I

Water Levels ~or Well 42A Date :levation NOT=S

---

~ ... _~-----~ -~..-_----- ... --~~~-

15-JUN-1911 141.50 18-JUN-1971 203.80 23-JUN-1911 141.00 01-JUL-1971 200.80 (I)

'1 4 - JU L -1 971 188.80 21-JUL-1971' 179.10 04-AUu-1971 113.50 11-AUG-1971 109.00 18-AUG-1971 104.70 25-AUG-1971 102.90 Ol-SEP-1911 102.00 08-SE?-1971 103.20 15-SEP-1971 101.80 28-SE?-1971 102.50 29-Sc:?-1971 d1.50 06-0CT-1911 93.30 23-0CT-197i 93.30 02-NGV-1971 97.20 lO-NOV-1971 96.20 17-NDV-1371 98.00 23-NCV-l';71 99.70 Ol-DEC-1971 100.90 07-DEC-1971 101.00 14-D:C-1971 101.20 23-D:C-1971 100.70 29-DEC-1971 102.50 03-JAN-1912 99.50 12-J~t~-1972 sa.so l -;-J AN-197 2 101.10 26-JAN-1972 39.00 03-F:3-1972 100.~O 09-FE8-1972 . 99.70 23-FES-1972 101.70 -

02-MAR-1972 100.70 09-MA~-1972 100.70 16-MAR-1972 100.70 21-MAR-1972 101.50 18-APR-1972 101.2.0 26-APR-1973 108.40 30-MAY-1S13 108.50 21-JUL-1973 110.50 13-0CT-1973 108.10 03-NOV-1973 101.80 09-DEC-1973 101.30 07-JAN-1974 108.00 lO-FE*B-1974 104.60 23-MAR-1974 105.80 17-APR-1974 109.60 l~OTE:

(1) These data not valid. The measurements represent water in the well used in construction and development, not aquifer water

Water levels for well 425 J

Date Elevation NOT=S

~- .. -- ... --~-~- ~~-----~- -~-.~-

lS-JUN-l~71 lb7.40 16-JUN-l;71 117.20 (1) 18-JUN-1971 174.g0 23-JUN-1971 175.40 04-AUG-1971 12:.00 l1-AUG-1971 120.70 IB-AU~-1971 120.40

,5-AU\;-1971 120.80 Ol-SE?-1971 120.30 08-SEP-1971 120.40 lS-SEP-1971 120.70 30-SeP-1971 120.10 23-0CT-1971 120.20 02-~OV-1971 115.40 lO-f'.4JV-1971 119.60 17-NOV-1971 117.80 23-NuV-1971 116.30 Ol-DEC-1971 118.40 07-DEC-1971 110.50 14-DEC-l.,71 118.30 23-DEC-1971 118.20 Z9-DEC-l,71 I

118.90 OS-JAN-!972 118.20 12-JA~-1972 118.40 1'3-JAN-1S7~ 119.30 26-JAN-!S72 11;.10 03-Fc6-1~7L 120.10 09-F==-1372 120.80 23-FE:'-l'~72 121.;0 QZ-r.';AR-1372: 12Z.60 09-M~R-1972 122.50 16-MAR-1972 125.90 21-MAj(,-197~ 124.10 IB-APR-1972 122.50 27-JUL-197; 139.20 NOTE:

(1) These data not valid. The measurements represent water in the well used in construction and development, not formation pressure.

Water Levels for Well 42C Date Elevation NOT:S

~----,-.----~~-- ~- .. -~----~ ----~

lS-JUN-1971 151.70 16-JUN-1971 151.70 18-J UN-l 971 150.90 23-JUN-1971 152.20 01-JUL-1971 152.30 14-JUL-1S71 150.20 21-JUL-1371 152.00 Z6-JUL-1S71 151.60 04-AUG-1971 152.00 l1-AUG-1971 152.20 18-AUG-1S71 1,52.00 2S-AUG-1971 152.00 Ol-ScP-1971 151.50 oa-SEP-1 .971 151.70 15-SE:P-l;71 152.0C 30-SEP-1971 152.~O 23-0CT-1971 152.40 02-NOV-1S71 151.00 10-NOV-1S71 151.20 11-~wV-1971 151.20 Z3-NuV-l~71 151.2.0 I

Ol-DcC-1S71 1~1.1u 07-0EC-1S71 151.00 14-0EC-1971 152.20 23-DEC-1971 151.30 29-DEC-1S71 151.50 05-JAN-1S72 152.00 12-JAN-1972 lSl.SJ 1.,-JAN-1972 151.S0 26-JAN-1972 152.40 03-FES-1S72 152.60 Q9-f~5-1372 153.0u 23-FES-l,72 1~3.40 02-MAR-1972 153.5~

O;-MA~-1972 lS3.4Q 16-MA~-1972 155.80 Zl-~A~-1~"2 154.20 18-AP~-1972 153.70 21-JUL-1973 160.30

~ater Levels for Well 42D Date Elev~tion NOT:S 15-JUN-1971 157.90 16-JUN-l~71 159.40 18-JUN-1971 159.60 23-JUN-1S71 157.40 Ol-JUL-1971 157.00 14-JUL-1971 157.70 21-JUl-1971 157.70 ZB-JUL-1971 157.40 04-AUG-1S71 157. 3 00 ll-AUG-1971 157.00 18-AUG-1971 156.90

_ _ __ _ __ _ - - 2 0 5~ A U G ~1- 9-7 ~ - - 5-6-. -BG- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ol-SEP-1971 156.~C oa-SEP-1971 1-56. 90 lS-SEF-1S71 157.20 30-SEP-1971 151.40 06-0CT-li71 157.30 23-DCT-1971 157.60 02-NGV-1971 156.60 lO-NuV-1971 156.10 17-NOV-li71 156.70 23-NCV-1971 1~6.70 Ol-OEC-1971 156.70 07-0EC-1971 155.7C 14-DEC-1971 156.70 23-~EC-1S71 154.20 29-~EC-1971 156.20 05-JA~-lS72 156.50 12-JAN-1972 15b.40 19-JAN-l~72 156.70 26-JAN-1972 156.40 03 - F E 5 -1 S 7 2 1-5-6

• 08 0 09-FEo-1972 156.90 23-FE~-lS72 156.9C 02-MAR-1972 157.30 03-MAR-1972 156.;0 16-M~R-1972 ISS.S0 21-MAR-1972 158.70 13-APR-1972 151.40 26-APR-1973 160.00 3 0 - M~ Y-1 9 1 3 1 6 0

• 7*0

________ __ ~ 1~ J U~~~~~~ ~~1~20 - - - - - - - - - - - - - - - - - - - - - -

13-0CT-1973 161.10 03-NOV-1973 160.60 09-DEC-1973 160.30 07-JAN-1974 01 5 2 . 3 0 lO-FE5-1974 157.30 23-MAR-1974 157.70 17-APR-1974 157.30

w~ter Levels fer W~ll lOl~

h. :" T:: S

:: ~ a  ::12v?ti~n

---

~---

--.-. ... -~

13-CJCT-1971 117.70 2.4-0Ci-l~71 117.20 02-N8V-1371 116.0 0 lO-t\JV-1971 116.eO 17-NGV-l~71 11e.BO

• 2: 3 - N2 V-1 '7 7 1 116.70 o 1- 0 =.C -1 37 1 116.:0

~7-D:C-l '371 117.08 14-L:)EC-l:"71 ll~ .30 23-:: ':-1 ;71 11t.S G 2~-JEC-l ~:l 11 S.CO 05-JA N-1S72 117. 30 12-JAN-l:;'72 117. SO lj-J~~-l 37 2 11;.00

,-6-JM N-lg 7~ 11'j.3 G 03-FE::-l~7" 119.30

. O;*- F E 3 - 1 ~ 7 Z. 113.50 23-~:::-1972 119.~ J j2-MA R-l~7Z 11 ~ .SO O~-MA;(-197,- 11S .5C 15-M~i<-1 '~7 2 116. bO I

21-M~R-l '37 2: 11;. 50 1 3-~P;(.-1 ~i .:

~:'S-A?  ;,-1-:'7::

11 .~

12C. ~O I

3 ~ - f.~ ~ Y-1  ::J73 11b.20 lJ-JuL-lj73 ll~.';~

Z7-JuL-l '; 7 ~ ~ 1 -*: I

• .. I.:

2:-S=P-1973 11~

• c..... .-'i r-13-:CT-l~73 11 *:

,A t

• 'j \",

03-NQV-l O~-D=:-1~73

~7;'

11~.50

~

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- * .: U

~

11 -. * ':*0 J 7- J ~ t*~-l "j ! "

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Water L~v:ls for w~ll 12; J : t .: E 1 e vat i 0 !i ~\i:: i :: ~

30-S:P-1971 154.;.(j Ol-GCT-1;71 05-:CT-1S71 1~4.40 07-:C T-l ';71 134.50 13-aCT-1S71 154.30 24-CCT-l~71 lS~.20 02-t~u '1-1971 153.60 10-NOV-1971 153.4 rJ 17-NOV-1371 1~3.50 2 3 - N 2 v -1 '3 7 1 Cl-:::C-l~71 154.0C.

J7-0EC-1971 154..20 14-C::C-1S71 154.10 23-CEC-lr:,71 154.30 Z;-uc:C-1-371 05 - J A t~ -1 ~ 7 Z 1:;4._0 1 .2 - J A t, - 1 ;:' ;: lS'+.':'~

19-JA~~-197 2 154.60

2. 6 - J t; r~ -1 ~ *7 2 154.;0 03-;=E~-1;7:: 155.0u 07-rc3-1;72 1:5.20 2~-F:~-1~7~  :~5.3(j 02-MM~-197L l;;S.c:

u3-~A=<-1;72.

16-MAt<.-1972 21-M.:.R-197;: 154.':',\

1:-;'F~.-1"97~ 15 *:'.~C ol-,~~ Y-1 'j7 ~ 1:'7.1J 3Q-~~Y-1373 lJ-JUL-! ~7-:;

27-JUL-l~7~

1 5- CCi -'1 =J.7 _ lc2.~C O:-NOV-1.~:3 102. * :J IJ 09-:*=:-1., J _

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Water Levels for Well 121 (Continued)

Date Elev~tion NOTES 27-JUN-19BO 156.00 27-SEP-1980 147.70 29-D~C-1980 143.90 28-MAR-1981 142.60 2'3-JUN-1981 ,141.60 23-MAR-1982 140.80 lS-JUN-1982 140.80 lS-SEP-19B2 141.00 I1-DEC-1982 140.60 J8-MAR-1S83 140.60 22-JUN-19.33 1,+7.80 lS-SEP-1983 151.00 12-DEC-1983 152.80 12-MAR-1984 154.10 12-JUN-1984 157.30 lS-SEP-1984 157.70 13-0EC-1984 157.20 04-FEb-19S5 157.20 NOTE:

(1) Data not valid. Data not plotted on hydro graph. Well covered by grading. Found at 1 foot below grade as reported on March 5, 1979. Well found to be plugged and was flushed, but later found that flushing did not remove plug. Well was cleaned with air on July 13, 1984.

The low water level reported in 1974, Elevation 144, is the correct water level measured on September 11, 1974. However, this water level reflects drawdown of the unconfined aquifer as a result of dewatering the Power Block excavation. Therefore, this level should not be compared with other water level data to dete~ine undisturbed, steady-state water level fluctuations of the unconfined aquifer.

In addition, the water level data for this well presented on Table 2.4.12-7 (Sheet 2 of 3) for all of 1979 and the first two quarters of 1980 are in error and should not be considered. The well was covered up during site grading and was not found until March 5, 1979. At this time, the well was found to be plugged and was washed in an effort to remove the obstruction. It was later found that the washing did not solve the problem. On July 13, 1984, the well was cleaned with air and is now considered operational.

w~ter L~v~ls for Well 13~

30-SEP-1971 113.00 Ol-CCT-l~71 112.30 05-0CT-l~71 lO~.10 01-0CT-1371 105.40 13-0CT-1971 105.00 24-0CT-1971 105.20 02-i~OV-l ~71 104.10 lO-NGV-1971 103.50 17-NC\j-1371 104.20 Z3-NOV-1971 104.50 Ol-D=C-l~71 1u5.3~

07-G:C-l'371 105.50 14-u::C-1S71 107.10 23-DE:C-1971 107.70

"~-D=C.-l~71 106.70 05-JAN-197: 105.70 1 2 - J A r~ -1 ~ 7 2. Ij5.~O 1 .~ - J A i~ - 1 9 7 2. l03.JU 2 'S - J A ~..-1 ~ 7 2- 10~.1u OS-r=2:3-1;72 l05.JCi 26-~?R-l~73 l*JS.SO 30-MA'(-1-:'73, I

lJ::.3J

2. 7-JLJL-l ';7; 106.':'C 13-:C1 .-1:;'73 1*J4.5C G3 - ~" ~ V - 1 ~ 7 3 1 0-4

• 1 Q OS-DEC-l;:'72 103.7D 07-JAN-l -;74 1J7.0*J IJ-~:=-1::'7:.. 1 Q '~

• 3 J 23-~~~-1~7':' llQ.~:

water Levels for well 133 Date El~v2tion 07-JUL-1979 145.70 26-NOV-1979 141.90 24-JAN-1980 211.50 Ol-FEo-1380 210.20 lS-FEa-1980 208.10 (1) 25-MAR-1980 146.00 29-0EC-1980 155.00 ZB-MAR-1981 156.20 (1) Data not valid - Well found to have an obstruction at Elevation 157.6 that could not be removed. Well was grouted.

water L~vels for Well l~C D~te  :: Le v s t i o n Ol-OCT-l 'j71 l~O.SO OS-CCT-1371 16:.30 Q7-0CT-1971 1~1.3C, 24-aCT-1971 160.70 02-t\:V-1971 13*~. 40 lO-NOV-1971 1 j; .4"C I1-NuV-1971 13~.90 23-NaV-l-?;71 150.00 Ol-JEC-1971 16J.CC 07-DEC-l'171 . - -. -....,

.1.,-:t.-;i,J 14-J=C-IC:7: l::J.IC 23-D:C-1911 15'j.~Q Z,-:~C"';1::'71 16:J.40 o5 - J A ~~ ;7 ~ 16u.~C 1 2 - J ~ t~ - 1 9 7 :.

1 ~-JA~~-l ~7 2 2: .s - J ~ ~~ - 1 ~ 7 2- 16J.30 03-F:S-l~72 160.1G o';- F =5 - 1 .~ 7 :2 15';.';0 23-F:~-1~7: l:'C.':'O 150.~v o9 - fv1 AK- 1 1 7 2 161.!.G I 1 6"- M ~ ~ - 1 :, 7 2 21-M;'F<-1~7~

16-~?K-:17~

.1:,1.lCi 161.~O 161.1C J6-JuL-l~72 lS~.4 ':

25-:'P .~-1973 164.~J 30-~',AY-l ~7 3 2 7 - J UL... -1 .:; 7 ~ 16'E;.~C 13-GCT-l;73 loc*.3C 03-:EC-1373 1 .~7.4C Ji- J ~ j" - 1 .;. 7 ~ 16;.7J 10-F=3-:~7~ 1~~.20 17-AF~-197"t I

W3 t e r Lev ~ Is f or W~ 11 1 ~ 1*

J2 t *~

Ol-CCT-1971 :5".50 05-0CT-1971 154.70 J7-CCT-1971 13~.7G 12-0CT-19 71 154.:0 13-0CT-li71 154.70 24-CCi-1971 154.70 02-NCV-1971 154.10 lO-NOV-197:

17-NJV-l~71 15~.JQ

.23-NOV-l';71 13':'.20 J1-0:(-1,,71 15'.2C o7 - 0 :: C-1 '1 7 1 15".~:;

14-JL:C-1971 154.30 23-C':C-1571 1:;4.':;0 2j-JEC-lj71 154.40 CS-JAN-137:' 154.30 12-JAi~-lS72 15i..6C 1 .~ - J t: i~ -1 ~ 72 134.~:

2~-J~\i-l'172 03-FC:~-1~72.  :~4.40 O~-F-==-1~7: l::-.=C 1;:.10 '

02-,..~",,~-1;7 ~

O~ - ~ A ~ - 1 'j 7 2 15-~~K-~~7~ l55.40 21 - ~~ A. 'K -1 ::7 ~ 15~.5C 1~-~?R-l::;72

water Levels for well 142 (Continuad)

Date =levation NGT~5 11-0EC-1982 146.10 03-MAR-1983 146.30 2.2-JUN-1983 152.30 lS-SEP-1983 153.30 12-0EC-1983 134.40 12-MAR-1384 155.10 12-JUN-1984 166.10 (3) 18-SEP-1S84 156.50 13-DEC-l;84 155.90 04-FEa-1985 155.70 NOTES:

(1) Measurement considered not valid. Data not plotted on hydro graph. This level is 10 feet. lower than lowest measurement recorded during dewatering.

(2) Values not valid. Data not plotted on hydro graph.

Data sheets show well is stopped up.

(3) Value not valid. Data not plotted on hydrograph.

D~ta sheets show well plugged and washed out. This measurement was made just after well flushing and is wash water.

The low water level recorded on Table 2.4.12-7 for 1973, Elevation 136, measured on Hay 1, 1973, is considered in error. This level is the lowest level ever recorded for this well and is far out of line with the other measurements. The level is 10 feet . lower than the lowest measurement 'recorded for this well during dewatering of the Power Block excavation.

The water levels reported for the second and third quarter of 1979 are also not valid. These elevations are 217.6 ft measured on July 7, 1979 and 222.0 ft measured on November 26, 1979. The field data sheet for both of these dates state that the "well is full of sediment".

The well was cleaned by washing in June of 1984 and~is now considered operational.

Water Levgls fer ~911 14~

Date NCT -: S Ol-OCT-1971 154.00 OS-OCT-1971 154.10 07-0CT-1971 154.90 13-0CT-1311 1S4.~O 24-0CT-1911 154.20 02-NDV-1371 153.00 10-NOV-1971 153.20 17-NOV-1971 153.50

,3-NOV-1971 153.60 Ol-DEC-1971 153.60 01-DEC-1971 153.60 14-DEC-1971 153.70 23-0EC-1971 153.50 29-DEC-1971 153.70 05-JAN-1972 154.00 12-JAN-1972 154.20 19-JAN-1972 154.30 26-JAN-1972 154.40 a3-F E5-197 2 154.60 09-FEa-1372 154.50 23-FEB-1972 155.20 02-MAR-1972 155.00 09-MAR-1912. 155.00 16-MAR-1912 153.00 21-MAR-1972 154.70 18-APR-1972 154.00 26-APR-1973 161.60 30-MAY-1973 162.00 27-JUL-1973 152.90 13-0CT-1973 162.30 03-NOV-1973 162.00 09-DE*C~197 3 161.30 07-JAN-1974 159.50 lO-FE8-1974 158.60 23-MAR-1974 160.00 l1-APR-1974 158.30 lS-AUG-1974 149.90 The water level measurement shown on Table 2.4.12-7 for the 1972 low is in error. The elevation listed is 143 ft. This number was dete~ined (in error) by subtracting the measured depth of well (82 ft below M.P.)

on 2/9/72 instead of the depth to water, which was 70.5 ft. The correct water level elevation is 154.5 ft. The correct low water level elevation for 1972 is 153.0 ft, measured on March 16.

w~ter Levels f=r W~ll 144 Date ~liv~tion ~GT~3 ll-OEC-l;a 10 ... 70 23-JUN-l~e 105.60 21-.scF-l *3~ 1(,;5.50 I

water ~evels for rl811 14SG Date Elevatlon NOTES Ol-OCT-1971 1 '36.10 05-0CT-1971 19.5.70 07-0CT-1971 193.60 12-QCT-1971 1~4.70 24-0Cr-1911 196.70 OZ-NOV-1971 1'14.90 lO-NOV-1971 196.30 17-NOV-1971 194.90 23-NOV-1911 196.60 01-DEC-1971 1 '36.50 01-0EC-1911 196.70 14-0EC-1911 197.30 23-DEC-1971 193.90 29-0EC-1971 1 '14.90 05-JAN-1912 195.00 12-JAN-1S12 1;4.70 19-JAN-!972 136.20 2.4-J AN-l"~7 Z 1~7.40 03-FES-1972 195.90 03-FES-1972 195.90 23-Fca-1972 195.50 02-MAR-1972 194.70 09-MAR-1972 194.60 16-MAR-1972 195.70 21-MAR-1972 115.40 18-APR-1972 194.70 Ol-MAY-1973 147.20 (1) 30-MAY-1973 160.50 27-JUL-1973 160.70 13-0CT-1913 158.30 03-NOV-1973 153.10 09-0EC-1973 157.40 (2) 01-JAN-1974 151.20 lO-FES-1974 154.90 23-MAR-1974 155.70 17-APR-1974 154.00 15-AUG-1974 152.20 NOTE:

(1) Data not valid. Data not plotted on hydrograph.

(2) Changed from monitoring by LETCO to monitoring by Georgia Power Co.

The water level elevation in this well fluctuated a maximum of 3.5 ft, between elevation 197.4 and 193.9, from the first measurements from 1/5/71 through 4/18/72. The April 18, 1972 measurement was the last measurement made by Law Engineering Co. personnel. The next measurement was made on May 1, 1973 by personnel of Georgia Power Co. and was recorded as elevation 147.20 ft. The remaining measurments through August 15, 1974, show the water level to fluctuate between 147.2 and 160.7 ft (13.5 ft).

We have no explanation for the more than 30 ft (consistent) difference