ML071700772

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Ground Water Supplement. Cover Through Chapter 2.3
ML071700772
Person / Time
Site: Vogtle, 05200011  Southern Nuclear icon.png
Issue date: 03/31/1985
From:
Georgia Power Co
To:
Office of New Reactors
References
+reviewedcja, AR-07-0924
Download: ML071700772 (50)
v • d • e


Text

1.0 2.0 2.1 2.2 2.3 GROUHD WATER SUPPLKKEBT TABLE OF COBTEITS I rrRODUCTIOIJ GROUHD WATER LEVELS Construction of Observation Wells;1971 to 1985 Water-level Keasurements Precipitation Table*2-1 2-2 rable 2-3 rable 2-4 Table 2-5'lable 2-6'lable 2-7 Table 2-8 Table 2-9 Table 2-10 Figure 2-1 Figure 2-2 Figure 2-3 Fleure 2-4 Fieure 2-5 Hydrographs Observation Wells in Unconfined Aquifer Observation Wells in Confined Aquifer Best of Observation Wells 42 Series Water-level Measurements from Observation Weils Augusta Weather Station--Konthly Precipitation Waynesboro Weather Station--Konthly Precipitation Blackville Weather Station--Konthly Precipitation Hampton Weather Station--Konthly Precipitation Savannah River Plant--Honthly Precipitation Vogtle Electric Generating Plant--Konthly Precipe Observation Wells 1971 to 1985 Monitoring Program February 1985 Precipitation Stations Annual Preeipitation Cumulative Precipitation of Observation Wells I 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 ,

caoUlfD WATKR SUPPLEHDT-rOLE OF COBTEIlTS (Continued)

3.2 Porosity

Table 3-1 rable 3-2 Table 3-3 Table 3-4 Fisure 3-1 Loss Logs Permeability Test Data--Barnwell Permeability Test Data--Blue Bluff Marl Permeability Tests--Utley Porosity Permeability and PorosityUnconfined Aquifer and Karl of Drill Holes with Permeability Data 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 Table 4-2 Table 4-3 Holes that Penetrate Blue Bluff Marl Aquiclude Holes Drilled into Confined Aquifer 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 January22and 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 o o o o Tabulated water-level measurements taken at all observation wells of the VEGP site, 1971 through January 1985.Hydrographs of the water levels measured in observation wells.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.Monthly precipitation records of the u.S.Weather Bureau stations at Augusta (Bush Field), Waynesboro, Blackville, SRP,andHampton for the period 1952 through 1983, and the partial monthly records of precipitation taken at the VEGP site during the period 1972 through 1983.Two figures are provided to show 1)the locations of all observation wells constructed at the VEGP site,and2)the wells thatmakeup 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.Asummary of that history is submitted to clarify the monitoring sequence, frequency, and periods of measurements.

2.1 Construction

of Observation Wells;1971 to 1985ground-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,andan 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-1Aand 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,andwhen 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 Blockcommenced.A majority of the wells were terminated at that time tomakeway 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 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 aquifer, including two within the backfill material adjacent to the Power

, Block, and 10 wells..,.".. 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,andtwo to the north and west of the power block in undisturbed Barnwell deposits.Locations of these planned wells areshownon 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'measurements since that initial period have generally been less frequent, except for a period December 11, 1980 through September 15,1982when 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 monitoringona quarterly basis.Monitoring was again stopped July1974when 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 I were made in observation wells800and802 during the period December 11, 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.

I 2.3 Precipitation Monthly precipitation datafrom5 stations within the vieinltJ of the VOltle Plant Site is summarized in Tables 2:,5 through 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 index.As apparent in Fisure the five nearby stations eXhibit similar characteristics and trends.

N"-)(()

.', 400 BOO\200 FIGURE 2-2 StALE IN FEET o 200 100 400 o SCALE IN FE.ET 8ECHTEL.AMGIUS GIEORGIAPOWIR CoMPANY'" i ALVIN W.VOGTI.ENUCI.IEAR PLANT'MONITORING PROGRAM , FEBRUARY 1985", SCALE: Contour intervola 5 ft.ond 25 fl.H...L..ndin, 1_"..

....110*I\IOrod by Clyde N.fl'd<'.A"kllllwl!lll'$.F<IlI25!7'

REFERENCE:

Site grading generalia:ed from OWe.NO.CX 2046V003.Within graded opproximate ple1/atiPns llhoWIl in.

NOTE: EXPLANATION Proposed additional observotion well (Locotion approximate)

Unconfined observa,tio n well..Confined aquifer observation well (TERTIARY).*Confined aquifer 100*)130138gB'"DETAIL@PLANT.SiTE N 80-/*00 N 75+00///205Limitof exCOVOtiOIl Proposed 8S0S (240)/f/

.., ,',\\\\\\'i\: ,.803A':\\,\(/8804+....w (220)(240)-(220)\\,\'-$-I i

"*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)

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 Active90597779 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)

HISTORY Well Installed Current No.(YR)Status*177 178 243'/.44 245 247 248 249 1971 Grouted, 1980 1971 Grouted, 1978 1972 Grouted, 1985 1972 Inactive)1979 (buried)1972 Grouted, 1978 1972 Inactive, 1972 (buried)1972 Inactive, 1972 (buried)1972 Inactive, 1979 (buried)*w TABLE 2-1 (continued)

OBSERVATION WELLS IN UNCONFINED AQUIFER Ground Top of Depth Surface PVC Top of Coordinates Elev.(l)Elev.(2)Marl(3)Screen Depth(3)N E (ft)(ft)(ft)(ft)----8560 10865 213.0 213.0 79 60-80 9958 8994 240.4 240.5 89 71 91 9154 8618 213.0 225.2 71 60 80 8835 8859 212.6 213.7 72 51-71 8501 9917 207.6 209.0 71.5 52 92 5750 5424 211.3 82 70-80 7469 5111 166.8 70.3 60-70 8826 10154 193.0 194.0 57.9 47 57*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 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*GroundTop of Depth HISTORY Surface PVC Bot.of Well Installed Current Coordinates Elev.(l)E1ev.(2)Mar1(3)Screen Depth(3).No.(YR)Status N E (ft)(ft)(ft)(ft)----27 1971 Active 8622 13931 210.0 209.0 148180-190 29 1971 Active 9975 12392 193.0 193.4126200-210850A1984 Active 11723 10494 225.9 227.8135169-179 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 227.6 229.1145195:...205 854 1984 Active 9899 7917 236.8 238.3 153197-207 855 1984 Active 7159 13951'-18.0 219.4 173219-229 856 1984 Active 4927 12558 186.7 188.1 155 176-186 24 1971 Grouted 7850 9092 216.0 216.4 145210-220 26 1971 Grouted, 1984596315197 203.0 203.8 158 190-200 31 1971 Grou ted, 1984 8764 11237 211.0 216.8 151 200-210 32 1971 Grouted, 1984 9784 9572 214.0 217.4 139 200-210 33 1971 Grouted, 1984 11834 10864 238.0 238.6 157210-220 34 1971 Inactive(capped) 12180 10846 90.5 (4)90-100 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 280300 (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__.l tl.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 210.4 213.5 119.7220-230 (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 210.6 213.072-137 140-15042B1971 Grouted, 1974 8386 9544'210.472-137120-13042C1971 Grouted, 1974 8398 9563 210.072-137 80-90 42D 1971 Grouted, 1974 8403 9571 209.7 212.772-137 60-70 42E 1971 Grouted, 197484089580 209.672-137 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)

I TABLE 2-4 WATER LEVEL MEASUREMENTS FOR OBSERVATION WELLS well Z4 I u e-I'";.-1;"7 1 Y-l lS-JUN-l,7122-J UN-1': j 7 1 23-JUN-197:i 14-JUL-1371

° 04-AUS-!

1 0_oA J'"-1 0:'7 l 25-AU;-1371 Ol-SE?-1=J71

" 3-S::?-17 j, 23-:CT-l:;;71 02-NGV-!::71 1o-u V-17 1 17-t\GV-l:,71 Ol-G=C-l:'71 J7-:'::C-1371 14-:::-1:'71 23-:::C-157:

1 2-Ji"-1;, 70 1 7-J-!j 7 2 2 5-J-1."7

'Jj-F-==-2 23-F=;;-1:;72 G-i::;:-1-::.o1-AY-17.:.30 Y-l-;7 3 T-1o3-1\:.;O J-73 o7-J:,J-1;74 121.5C 122..70 116*.30 117.20 113.30 111.20 117.50 11S.:'C 116.2G 117.:],;117.00 117.50 112.20 115.20 117.BQ 117*.3C 117.3G 117.60 117.7C ll7*.20 117.0C-.......,.....L..;,.J..;

1:;.50 11S.:Jj:.:.:'.;.:....-..,,-..L"':*':...:

11?*.:.c...L.L(*I'...117.3C 11:'.:0 11*3 C;.JCT=S water Levels fer Well 24 N:T2S (C')ntinued)

I 1 0-F E-1 37 4" 121.0C 122.00 117.i0

fer 29-A?k-1971 06-MAY-197:

2 6-i'"Y-1 9 7 1 16-JUN-1911 17-JUN-1971 la-JUN-1,;il23-J i..J-1'5 7 1.Ol-JUL-1971 14-JUL-1S71 21-JUL-1S71 Z3-Jt.:L-1971 ll-AUi:'-1971 02-S:?-1971 Z j-3?-1'7 1 23-CCT-l;71.

o Z-i...0 V-1:,71 17-NOV-1C,71

71 23-C
C-l'971 o 5-Jt ,.-1:, i Z 1-JAr ,.-1:, 7 Z J 2- ,l-1:, 7 2 U'3-MK-1
-lj730-AY-172.7-JUL-l
'73 o3-t..G'v'-17;.

1.3:'.90 lOS.50 106.70 10Z.10 102.20 101.90 102.60 102.20 101.90 102.60 lOl.SO 101.50 lel.lO 103.90 1l,j2.70 102.10 102.10 1.,....-,....'t.*"...J 1J3.10 lJ2.3C l02.7G 10':'.10 10:;.:-:J lei*.?:,-,-J,.;.::;*::....,:.(\*JI*oJ..

1;J7.6';1:7.::0 103.:c ,.--c*v;*:: 104.20.

103.3J (1)

I" 07-JkN-157f.

o7-J A;.J-:-;7"';74 l1-Ar:<-1'374C2-J U-1'3 7:.:

25-NGV-13"7.,

Ses 0 27-J u-1;E 0 27-S::?-1,3C 2-J

-1: 11 5-J U-1 S:: 2 o 3-!'1M22-J LJ-1:,::.11-J Uf\J-1S.;NOTE: 107.20 107.2C 10Q.10 10S.:30 lC6.2C 103.50 102.';0 1 C*:*D l02.7*J IJ1.-+C 1[';1.,,-'.)1v1.'10 100.40 101.60 lJ').4G 1 Q0*C 10*:*'30 lJJ.?G 10:-.'?C (1)Initial measurement after construction and testingJis not considered valid.Data not plotted on hydrograph.

tf}tilI"o......o C)(J<.:J 0 a 0 Co':>c.)(:>(., C)<':':>,-:.:l 0 C>C)r>>c>n 1':'1 C)r',:>c:)()(.),:_"l l:>C)C:l"oJ IJ In (1)lJ\..t l'"\j I.n ri 00 In l"C)r-f 1.1'..."0 t-t'-I" r-ri In 0 (lo c>r-..,j C)'.":':)U\C:J f i r-.l).............'...r'" rt')rl rl rl (l" M 0 C...*, rt).", C"" r..**C)c'..>C)Cl a (J...i C)*n C)C).....t IJ\U", t-.......*f t-I I'(1\.",*0'0'0 r-.1,)cn'0 0)r-'0 ('Q (0 (Jf\X)10 ,:n.1)(0 n1 en Uj r-(l),('1) of).....n-o*n'0 1\),_:)C)f.::>Cl"." (')*.:J'J C>(-J'".:.)I.)(.""'>...-.., LJ'-J ,',.!.J0-I)f"-('.,.j'1.1.), ,.........t il\-I CJ....\.)I..)r,**e'(:).J C'J ,'t ,'()'-1.1I.....c'" ,,Jl)l)I I)I r).0 t: ,.!1./1..:0 I lJ:.0: un-0',.0*0*().-f rl t-r" 0\.......r-iII>-<t....'""1:-.:>.:II Oc"" r-i r-i....rl rl........0'rl rl............-f.i.-i............

t-*r-r'-1'-t-r-,-,..-t-r....r--,....-,......r--r--I." t"{1'I" (J\tJ'\'.1'," ,:t't (" t" c1'.'J'l ,1'0\*."rlr-i.-t r-f*..rl rl.....I*t,I,,,I,*II It',-."Z Z Z...J....J..J.J*')I!)'!l n..'1.::-..J::::l:.l J:::>':>::l J::>:::>.:J::>::::J.lJ.LJ IU-,-,-,-,-,--,..,...,-,.,<..(e:t c..(......f.t/t Vl V),**,,*II,II tIII*I In'0 r-10 (" f{)......*.t.-i iO10'".....'0 In...................

,'"*J (':':)rl t'" NO r'J 0 0..........'-1.-i t-r-r--Cl'.." (r,r'.......*i riI,,I 11_t-.->'U (J\....)(')\/)C)Cl ZIIIIC>-*0 CV)(" (\')'"")'-.)n

.-i r-f r--rh l'"l\.......ro4II>>CJ c.)Z., o......rl rl ri.....,.....r-f......;'\Joj (J I"J:'J ,"J (".J'" I'.'c.J ,'oJ'-'J f')i')I'):'f)1'-)r-t--t'-r-.r--,.-r..*t-r-r-t-t'-,........t**",.-t*, ,...t-,-.t'-t'-r-t." r" 11'1"'." ,,,.,..(1\:1'fl\11" ,'1\: 1\17'I}'\rtv ,), ,'1'{l\.J\1.1-J".)"\()'\(1'"..........

r-4..........

-4..-I.....0'-4...-(.........-t ,-t rl....-t........**f......."1 rot..-4 rl r-4.....I,III It'*1 I.I*IIIII">l.)'.)1_">tJ',J.'._-<....dl ()1.0 l..I-=: I....IY ll'I.L 0'>--_.n..->L)1".1IIJIIJ III iU!II-1:-,.(<:1..{'U I!.J III-:{<"'{..::t 0;1: L\..o.,-t.::>111 U.:'1.It.:),'..)("J I"")':l...,....,...., IL II.it--i: "Y:c:(-:;1..., 4/')t.:)., I),I**III,,*II,,,II,,I,", f").--4 r-t tvl ,,, h'I*J"" , 0 ,q.f'1'1')'..J 11'.f)rl 1 0 ,()0 C>('oJ I'f)1"1 n,.." ,')n ,'..r" f" (:l...........'J 0 C)(..J".:l r-:l r-f ('\J......N.-4 I'"......0 c'":)**

for 27 07-JAi*..-1974.13-AJG-1974 26-N:V-19i5 27-J J N-1.;s G 27-J iJ-1., 3 J 30-JUN-l;:O 27-S:?-1 9*3 G ,7-S:P-1S80 26-NGV-l;3

'25-:EC-lS8J

";2 ,1 3 0.:..J U-1": 1 2 15-JUN-l;82.15-S:?-19S2 Il-D=C-l;:l

.j b-i-1 A K-13 22-JUN-l';

  • 21-SE?-1'3=
    ;12-:::-1'::313-M-1:....11-JU-1.;4 l ,b-SEP-l 04.-;F==-1';25
4.10 80.10 87.50&4.40 62.50 31.61 22.20 52.5Q 62.6C c2.:0 82.60:32.30 3Z.30 el.1e 51.1J 52.Sa el.20 6C*00:f:Pb 61*;C 74-.SQ-1u.i)(J 75.2C jC*7;y"CO 50.7S 7;.7"1 7*7'1

Levels forI Date 2 6- A Y-1...,71 lS-JUN-1;71 17-JUN-1311 lo-JuN-1971 Z2-J U-1';71 23-JLJN-1971 Ol-JUL-l;71 21-JJL-1371 Z6-JUL-1971 lo-AUG-l';71 23-AUG-1971 23-CCT-l'371 02-NJV-l';71 j,'0-w v'-171 17-f\::V-l

=}7:'23-r"4Gv-l';71 Jl-w=C-::',71 07-:::-1571 23-::=C-1;;71 l2-JA:J-l:'7: 1.,-J;.;\J-1 7::.;.2: 5-J.:-1::"7.:

o--1=: 716-',1\A-17 2 21--1.;7:.

26-A?;<-1'172

.30-..y-1.,'7 3

72 1 O*C V-I7 3 J-Ci
C-1Si73 o

10;.30 105.0C lQ3.i.O 107.10 106.:;0 IJc,.OG loS'O'C lOD.SO 103.30 102.30 lOl.5J ,...1..J_*..,I"" 101.:0 lOZ.lJ lC2.QJ 101.70 lJ2..cv*C G

-r"....." ,c*u lit-.-'";....J*:>"i 1 c1*.: cGlC::.:C<>>i.....-*I I.,,;1 8:*-:.: 1 ()*fD lot./....:*2 C' IOl.?1C;.*.?']'1;*LJ'j*4 C.20 lli.70

LEvelsWellZg-.c ievr t a c n lO-FES-1974 l1-APR-l';74 26-NGV-1975

-1';'3:i.2 3-JUt3 j, L3-M A Po-1.;*3 2 15-:CT-ljE5:

18-S':P-l;

..

.00 37.9 U;7.30;6.50 104.00

';".0*) 32.::0-c: r:.-......:.u;::'.70.,Z.J7..._....":...*'-: I",----": z*:::>;

fer 31 Ol-JUL-1571 21-JUL-1971 2o-JUL-1971 04-AUG-19il 11-AUG-1971 13-AUG-1971 Ol-SE?-1571.

J 6-S:?-171 1 5-S=p-1'3 7 1 02-NGv-l.,71 23-NCV-l'ii71 u1-DC-1 37 1.J7-:;:C-1971 2 3-J eC-71 2

09-FE=-lj7,2 2 J 2--1-;7.2 J 2.

21-t*i-1'7:

Y-I o 3-C;v-:.:, t:

...'".J.., i.,._......._,,_

2 3-;..;-1.;.7-15-AUG-l';74 o j-J U-:7.;J7-J JL-1

';7':, 101.40 105.20 107.10 107.30 107.10 107.60 101.90 10S.60 103.40 IJ7.60 107.60 lG7.-.G 107.10 105.60 105.eO ios vs o lOt*.30 106.20 10S.62 103.;0 105.30 107.3-0 1:0.70 111.70'1-,'" 1......:.

lC:*.30 1:Z.1C lJ7.7:*-""--.--.:.;',....11C*1 l'J:,*?C

.-_.1.-: 4*';L 1 0c*';7.lJ7.2C

Levels for well 31 Dat*a 11-J A-1;3 0

-Z7-JUN-l SE 0 27-JJN-lgS0 28-JUN-1920 3C-JUN-19EO 27-SEP-l';E'Q 27-S:;?-li3C 26-NaV-l;2J

,-;-CEC-1520 3 0-J U-1 S 3 1 lS-JUN-1922 Zl-SEF-1S33 NOTE: 1J6.5';

107.10 107.10 107.10 107.10 107.10 10:.*1: 1 lC3.1C 105.20 105.2C lC3.40 103.-:;0 103.50:'03.50 103.5'J 104.721., ,'"""""c v (1)(1)(1)(1)Data not valid.Data not plotted on hydrograph.

Well damaged during construction of cooling towers.

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 21-JUL-1971 10 4*. 26-JUL-l:;71 1*0:*j G 1 5-AUG-1'?71 107.20 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.;71 107*.00 lO6.2C 23-SCT-1S71 IJt.1O 105.90 l O-NGV-197l 1v:.4C 17-N2V-l._, 103.6 0--.., I...23-N2V-1971 lC5.7C Ol-JcC-1S7j, 106.2.J 07-'S:;C-1;71 107.60 23-:=C-1-..lO b.60.,.J,.29-JEC-1971.

102.7 0 05-JA=;72 107.7 01;-J A\l-1372.IJ.:.20 1 r-c t.,-I\J...'-""'" 03-F:3-1 37;;.

,...,.11'J.7C-;I"

1 1*,..............;.J 2R-1.7 to lGe*;0 o-1 9 7::1C S*, ,"\..,;'.,.J103.30 21-*..,...., r..u;O.....\..j 1 C'-p;<-:.'-:, 71 G 3*(!

11*50 Y-l:;7:,:.J::.70 27-JJL-1"3 Iv ,.7C 13-CC 3 1 IJ:;.4 0 03-h n:v-l-7-.lCS.OC.:;;J-J=C-: '"j 71 04*..1 97I 1 J 1*6 J 23-MAR-137':" 102.4(: 17-AP;;-1974 10::**0C

for Well 32 I lS-AU*:;-1974 27-JUf\;-1

  • 9EO 27-Sc?-1;;O Z;-CEC-1SSO 2-J U N-1;.: 115-J U-1=3 2.

11-':;EC-1ge2 2 2-J U f-J-1 g e 3 15-ScP-l S*3.31 2.- A Q-1;?4 106.90 107*D u" 106.40 107.10 103.20.104.10 lIJ4.4.J 103.30 105.00 , n-;.': r*................

102.10 1*J7.0J 103.00 101.7-J 107.60 Water Levels 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)'14-JUL-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 sa.so l-;-J AN-197 2 101.10 26-JAN-1972 39.00 03-F:3-1972 09-FE8-1972

.99.70 23-FES-1972 101.70-02-MAR-1972 100.70 100.70 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 (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 Date Elevation NOT=S..--...

lb7.40 J 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 120.70 120.40 ,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 120.20 115.40 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 I Z9-DEC-l,71 118.90 OS-JAN-!972 118.20 118.40 119.30 26-JAN-!S72 11;.10 120.10 09-F==-1372 120.80 2 121.;0 QZ-r.';AR-1372:

12Z.60 122.50 16-MAR-1972 125.90 124.10 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 23-0CT-1971 152.40 02-NOV-1S71 151.00 10-NOV-1S71 151.20 151.20 151.2.0 I Ol-DcC-1S71 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 152.60 153.0u 23-FES-l,72 02-MAR-1972 lS3.4Q 155.80 154.20 153.70 21-JUL-1973 160.30

Levels for Well 42D Date NOT:S 15-JUN-1971 157.90 159.40 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 157.030 ll-AUG-1971 157.00 18-AUG-1971 156.90________ U9-7-1----1-5-6-.-B G------------------------------------------------Ol-SEP-1971 o a-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 Ol-OEC-1971 156.70 07-0EC-1971 155.7C 14-DEC-1971 156.70 154.20 156.20 156.50 12-JAN-1972 15b.40 156.70 26-JAN-1972 156.40 03-F E 5-1 S72 1-5-6*0 8 0 09-FEo-1972 156.90 156.9C 02-MAR-1972 157.30 03-MAR-1972 156.;0 ISS.S0 21-MAR-1972 158.70 13-APR-1972 151.40 26-APR-1973 160.0030-MY-1 9 1 3 1 6 0*7*0__________

0-------------13-0CT-1973 161.10 03-NOV-1973 160.60 09-DEC-1973 160.30 07-JAN-1974 0152.30 lO-FE5-1974 157.30 23-MAR-1974 157.70 17-APR-1974 157.30

Levels fer h.:" T:: S-...._.._-------

--.-....13-CJCT-1971 117.70 117.20 02-N8V-1371 116.0 0 lO-t\JV-1971 116.eO 11e.BO*2: 3-N2 V-1'77 1 116.70 o 1-0=.C-1 37 1 116.:0 117.08 14-L:)EC-l:"71.30 23-:: ':-1;71 11t.S G 11 S.CO 05-JA N-1S72 117.30 12-JAN-l:;'72 117.SO 37 2 11;.0011'j.3 G 119.30.O;*-FE3-17 Z.113.50 11.SO 11S.5C 2 116.bO I 2: 11;.50.: 11-,..*-I.'...

,-1-
'7:: 3-Y-1::J73 11b.20 lJ-JuL-lj73 Z 7-JuL-l';71-*: I-.*..I.: 2:-S=P-1973*c.'i.....'-'

11*: r-, A t*'j\", 03-NQV-l

,-*.: U*.L.J7-J-.,.11-.*':*0"j!"

11*.,;11*C'11*.::

  • .....t,.)C'U c'.....t,*f'J.....l..u 1'1.-'" t...,CI C.l'J C.J 0 N.....t-O N f\.......0 0 t*,..........0 N f.oo6 Ct 0 00......\."-.I Cl-.J-JI t..*\." 1'.'-...Cl 0 (J.(JJ......(J'."'.N VJ ,f l lAJ 00 I'd VI ,'I tJ'.I--.......4,))...., C)tv.J'o"-..-.I VI.....\..9 OJ ,*I****, , , , I I,, I ,*I I I IIII , I I t I , , t t., I I I I t I ,...J:>1:-'1 L ('.';Z ('..Vl<-L s:);:..:it: 3:3'-n-n-'1 L c, L-e....C J f"..)C)tJ l".J"7Z Z C)Ct fJ C)C)("n CJ Ii>n'C-U)7..III't'..II I CJ rl H I C C.t.."U""(, l:'ol"]....rr, r': n!:1....'l>J>V rfl n.nl n, fll CJ L J C)C)CJ ('"l nC't Cl n, 01 ,'"U)X.:...., U s: C",<.:-4r-r-<;,n ,.,;A);\,:I'J ll'.U*zr"Z.'..("'l ,.r, eJ C'<.<:<<...-t-.-t-.u ,..,*III I I I , I I I I I I I I I I , I I , I III I I I I I I I.., I I (\)r........................t-----'t*......................................,j..t-'..................................-...........-.......................A....fi)\(.'\ll'4'\.1.\.{\,(,\,{)\.11\,(1"'.'0\.il\J)\IJ'11\.i'y j ,(1\.i.\L'u*""'\,£',\.il\II y)ul ,{I\Lo'I(i'-!'\Ll co\L'\0 c:::."..J-J"'"-..............-'J-....-...-04-J.-.J-.J...........--J.....**oJ-..-.a-..I--.I-.,....,-.....--J...J-I-J-.J-J-.j-.t-oj"'"......til f.f'..l.f.'...hJ l" tid v*h'hJ hI c**".I",".1 ,,, r-: r**"-I'J t...J Iv t...Jto--'.....a..t--'.....

.-.....a...-'....f-I fl)-+.III 0.....t*.........t***....'t*...................................t-.a..............,...................-....'................-.................-......I-t-', o-n 0'O*o-0 U'O*-J 11-oJ o-a (J U'*0 0'(l'0, (f'(J 0'0 (t.0'0'Q.0"-o*o*u'o*(1'0'0-(l'0" 0', 0'*(1'o*tv-o r, ,\:I I'h (J.",.'" C I'0 C,), I).'-J fJ".r,.l r-." N"J t ,t r...," , f ,,)N.......-40................,A f*................-.-.............-......<::It ,.****.**********flJ (I)f..J ("\1'1 (1.HI ,...fs, (.1 ct.t" l Y i 11.t',l-J-oJ (J"'....,.UJ",t f'J ,.........0 C)"J1 (l , U J 1'.1'tv (", C,\11\n\1),:0\Jt 0..-.I 0rn r+t-'c.'l ("'l c.)C)C"J c....r.)L,I Cj C)C'f'.)c)c)C)C')0 C*C.::>c..J C'<:...(J lJ Cl C'C>e, C:.l C)C)0 C)CJ c.)C-, CJ0 C:J 0........1 ().:J......('...of...2": Itn;V*

Water for 12;J: t.: E 1 e vat i 0!i i::30-S:P-1971 Ol-GCT-1;71 05-:CT-1S71 07-:C T-l';71 13-aCT-1S71

'1-1971 10-NOV-1971 17-NOV-1371 2 3-N 2 v-1'371 J7-0EC-1971 14-C::C-1S71 23-CEC-lr:,71 Z;-uc:C-1-371 05-J A-17 Z 1.2-J At,-1;:';:

2 2.6-J t;-1 2 07-rc3-1;72 16-MAt<.-1972 21-M.:.R-197;:o Y-1'j7 lJ-JUL-!

1 5-C C i-'1=J.7_

09-:*=:-1.,J_o7-Ji\-1 j 7 4 2.3-!'-" A;:-1;7.,

...11-S::?-1574 o2-J U-1 9 7;Ci7-JUL-l;7S 26-NCV-lg7S D

"" C o'

\J 01-;:::-1;J 15-Fv 2S-M J 0 154.;.(j 134.50 154.30 153.60 153.4 r J 154.0C.154..20 154.10 154.30 1:;4._0 154.60 154.;0 155.0u 1:5.20 l;;S.c: 154.':',\

1:'7.1J 102.*: J IJ 1...."*SO i-i....".-..,,;1.;.....:.: z......:*J.J 2il.7: '151.* (1)(1)(1)(1)(1)(1)(1)(1)(1)

Water Levels for Well 121 (Continued)

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

for WellI 30-SEP-1971 01-0CT-1371 13-0CT-1971 24-0CT-1971 lO-NGV-1971 17-NC\j-1371 Z3-NOV-1971 07-G:C-l'371 14-u::C-1S71 23-DE:C-1971 05-JAN-197:12-J A-17 2.1-J A-1 972.2'S-J A..-17OS-r=2:3-1;72 30-MA'(-1-:'73, 2.7-JLJL-l';7;13-:C1.-1:;'73 G3-V-173 OS-DEC-l;:'72 07-JAN-l-;74 113.00 112.30 105.40 105.00 105.20 104.10 103.50 104.20 104.50 105.50 107.10 107.70 106.70 105.70 l03.JU l05.JCi l*JS.SO lJ::.3J 106.':'C 1*J4.5C 1 0-4*1 Q 103.7D 1J7.0*J 1*3 J water Levels for well 133 Date 07-JUL-1979 26-NOV-1979 24-JAN-1980 Ol-FEo-1380 lS-FEa-1980 25-MAR-1980 29-0EC-1980 ZB-MAR-1981 145.70 141.90 211.50 210.20 208.10 146.00 155.00 156.20 (1)(1)Data not valid-Well found to have an obstruction at Elevation 157.6 that could not be removed.Well was grouted.

water for Well I I Ol-OCT-l'j71 OS-CCT-1371 Q7-0CT-1971 24-aCT-1971 02-t\:V-1971 lO-NOV-1971 I1-NuV-1971 23-NaV-l-?;71 Ol-JEC-1971 07-DEC-l'171 14-J=C-IC:7:

23-D:C-1911 o 5-J A-1-;712-J-1 9 7:.1 2 2:.s-J-17 o';-F=5-17:2 o 9-fv1 A K-1 1 7 2 1 6"-M-1:,72 327-J U L...-1.:;713-GCT-l;73 03-:EC-1373 J i-Jj"-1.;.7

Levs t ion 16:.30 160.70 40 1 j;.4"C 150.00 16J.CC.--.-....,.1.,-:t.-;i,J l::J.IC 16:J.40 16J.30 160.1G 15';.';0 l:'C.':'O 161.!.G.1:,1.lCi 161.1C loc*.3C 16;.7J W 3 t e r LevIs f or W11 11*J2Ol-CCT-1971 05-0CT-1971 J7-CCT-1971 12-0CT-19 71 13-0CT-li71 24-CCi-1971 02-NCV-1971 lO-NOV-197:

.23-NOV-l';71 J1-0:(-1,,71 o7-0:: C-1'171 14-JL:C-1971 23-C':C-1571 2j-JEC-lj71 CS-JAN-137:'

1-J t:-17 2-A-1'j72 21-A.'K-1:: 7

5".50 154.70 154.:0 154.70 154.70 154.10 13':'.20 15'.2C 154.30 1:;4.':;0 154.40 154.30 15i..6C l::-.=C 1;:.10'l55.40 water Levels for well 142 (Continuad)

Date 11-0EC-1982 03-MAR-1983 2.2-JUN-1983 lS-SEP-1983 12-0EC-1983 12-MAR-1384 12-JUN-1984 18-SEP-1S84 13-DEC-l;84 04-FEa-1985 NOTES:=levation 146.10 146.30 152.30 153.30 134.40 155.10 166.10 156.50 155.90 155.70 (3)(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. sheets show well plugged and washed out.This measurementwasmade just after well flushing and is wash water.Thelow water level recorded on Table 2.4.12-7 for 1973, Elevation 136, measuredonHay 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 now considered operational.

Water Levgls ferDate Ol-OCT-1971 OS-OCT-1971 07-0CT-1971 13-0CT-1311 24-0CT-1911 02-NDV-1371 10-NOV-1971 17-NOV-1971

,3-NOV-1971 Ol-DEC-1971 01-DEC-1971 14-DEC-1971 23-0EC-1971 29-DEC-1971 05-JAN-1972 12-JAN-1972 19-JAN-1972 26-JAN-1972 a 3-F E 5-197 2 09-FEa-1372 23-FEB-1972 02-MAR-1972 09-MAR-1912.

16-MAR-1912 21-MAR-1972 18-APR-1972 26-APR-1973 30-MAY-1973 27-JUL-1973 13-0CT-1973 03-NOV-1973 3 07-JAN-1974 lO-FE8-1974 23-MAR-1974 l1-APR-1974 lS-AUG-1974 154.00 154.10 154.90 154.20 153.00 153.20 153.50 153.60 153.60 153.60 153.70 153.50 153.70 154.00 154.20 154.30 154.40 154.60 154.50 155.20 155.00 155.00 153.00 154.70 154.00 161.60 162.00 152.90 162.30 162.00 161.30 159.50 158.60 160.00 158.30 149.90 NCT-:S The water level measurementshownon Table 2.4.12-7 for the 1972 low is in error.The elevation listed is 143 ft.This number was (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.

Levels f=r 144 Date I ll-OEC-l;a10...70 105.60 1(,;5.50 water for rl811 14SG Date Ol-OCT-1971 05-0CT-1971 07-0CT-1971 12-QCT-1971 24-0Cr-1911 OZ-NOV-1971 lO-NOV-1971 17-NOV-1971 23-NOV-1911 01-DEC-1971 01-0EC-1911 14-0EC-1911 23-DEC-1971 29-0EC-1971 05-JAN-1912 12-JAN-1S12 19-JAN-!972 2.4-J Z 03-FES-1972 03-FES-1972 23-Fca-1972 02-MAR-1972 09-MAR-1972 16-MAR-1972 21-MAR-1972 18-APR-1972 Ol-MAY-1973 30-MAY-1973 27-JUL-1973 13-0CT-1913 03-NOV-1973 09-0EC-1973 01-JAN-1974 lO-FES-1974 23-MAR-1974 17-APR-1974 15-AUG-1974 NOTE: Elevatlon 1'36.10 19.5.70 193.60 196.70 1'14.90 196.30 194.90 196.60 1'36.50 196.70 197.30 193.90 1'14.90 195.00 1;4.70 136.20 195.90 195.90 195.50 194.70 194.60 195.70 115.40 194.70 147.20 160.50 160.70 158.30 153.10 157.40 151.20 154.90 155.70 154.00 152.20 NOTES (1)(2)(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 fluctuatedamaximum 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 measurementmadebyLaw Engineering Co.personnel.

The next measurementwasmade on May 1,1973by 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

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