ML031970777

Email - Groundwater Well Drawdown

ML031970777
Person / Time
Site:	Quad Cities   (DPR-029, DPR-030)
Issue date:	03/20/2003
From:	Maher W Exelon Corp
To:	Larry Wheeler NRC/NRR/DRIP/RLEP
Wheeler L, NRR/DRIP/RLEP, 415-1444
References
Download: ML031970777 (5)

Text

I Duke Wheeler - Groundwater Well Drawdown Paae 1 1 I Duke Wheeler - Groundwater Well Drawdown Paoe I I From:

'Maher, William D." william.maher@exeloncorp.com>

To:

• Duke Wheeler (E-mail)" <dxw~nrc.gov>, 'McDowell Bruce (E-mail)"

<mcdowell5@ llnl.gov>

Date:

3120/03 7:15AM

Subject:

Groundwater Well Drawdown During the site audit at Quad Cities, a request was made by members of your team to provide a copy of groundwater drawdowns.

Attached you will find a copy of that list.

What follows is further clarification of the listing and what is performed WRT drawdown.

These are the readings taken quarterly when we do our well depth measurements on wells #1 & #5. They are a transposed number from measurements taken by procedure into a spreadsheet after the quarterly well depth measurements. The file is attached below. There is no legal requirement to perform these measurements. It is done for our own information. Some of the early data on the spreadsheet may be in question.

The main thing that the graph shows that the static water level and draw down has varied little over the years.

If looking at the spreadsheet, below is a summary of what the numbers are telling you:

Well #1 pump is set at 147' feet below ground elevation. The pump off reading is the reading taken from the air-line that is attached to the well piping and extends down to the same level that the pump is set. By applying air pressure to the air-line, you can tell how many feet of water are in the air line. The pump off reading subtracted from the air-line length is the static water level in the well. Thus if the pump off reading is 110', then the static water level is 37' (147 - 110). After the pump is started, you then take another reading on the air-line. If the reading after the pump is on is 77', then the draw down in the well is 33' (110 - 77). The original data from well #1 in 1967 had a static water level of 42' and a drawdown of 43'.

Well #5 is set at 205'. The original data from well #5 in 1969 had a static water level of 33' and a drawdown of 20'.

As can be seen by the attached spreadsheet, the static water levels in the wells have been very consistent over the years. The reason for the big difference between drawdown of the two wells is the well casing size and size of the pumps. The diminished drawdown of the individual pumps over the years is from pump degradation and scaling of well piping. The GPD for each well is based on hours the pump is operated and pump design capacity. The actual usage is less than reported, but is the best estimate we have.

If you should have any questions, please feel free to contact me at any time.

Bill 610.765.5939

I Duke Wheeler - Groundwater Well Drawdown Pace 21 I Duke Wheeler

- Groundwater Well Drawdown Paae 21~~~

<<Groundwater Drawdown.XLS>>

This e-mail and any of its attachments may contain Exelon Corporation proprietary information, which is privileged, confidential, or subject to copyright belonging to the Exelon Corporation family of Companies.

This e-mail is intended solely for the use of the individual or entity to which it is addressed. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution, copying, or action taken in relation to the contents of and attachments to this e-mail is strictly prohibited and may be unlawful. If you have received this e-mail in error, please notify the sender immediately and permanently delete the original and any copy of this e-mail and any printout. Thank You.

CC:

ClFulvio, Albert A." albert.fulvio~exeloncorp.com>

Ic\\ch\\excerGroundwater Drawdown.XLS-Graph 07/10/2003

Well #1 Depth Measurements 250 200 F 150 e

e t 100 50 0

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I ---- Drawdown -x-Pump On Pump Off l Well #5 Depth Measurements 250 200 F 150 gig e

t 100 50

--a-- Drawdown -x-Pump On - Pump Off k6ch~excer\\Groundwater Drawdown.XLSGraph 07110/2003

static Well No.1 Pumping Hours GPD Pump Off Lavel (It) Pump On Drawdown static Well No.5 Pumping Hours GPD Pumo Off Level (1)

Pumo On Drawdown Date

_.

3l80 71B9 1080 7890 110M 7190 1am~

17890 1l91 lSs1 4191 5i91 7191 ml91 12(91 1V92 1192 4/92 7192 12192 3193 4193 els3 12193 3ta4 els4 s04 3195 12195 396 s96 12196 397 8097 w97 12187 398 969 12198 3ss 4199 6M9 uss wss 12/99 30DO GMo 890 1/01 4/01 7/01 11/01 2102 5/02 am9 11/02 3/03 Ave.

4009 48 4496 49.109 48 4802 43.200 110 5154 36414 192 5773 55.022 106 5891 38.270 eo 6128 W.255 112 G288 25.948 112 6562 39.614 114 6802 6.000 114 6965 36.222 114 7239 44.432 112 7718 63165 112 7769 43.714 85 7982 29.379 112 8522 6211 112 8917 57.8W 112 9301 56.195 112 9570 41.385 112 9818 33,067 116 10203 40.174 114 10464 44.743 110 10713 35.153 112 11092 48.383 114 11463 42.000 112 11737 45,041 11e 12171 52,080 110 12665 63,742 115 13022 49.241 113 13505 57,386 111 13906 65.027 112 14274 46,979 114 14709 58,000 110 15260 61222 111 15732 71,696 111 16280 65.109 114 16937 84.774 11e 17297 57,600 111 17674 49.714 111 18274 79,121 113 18607 42,968 113 18732 16.667 112 oos 18975 21,761 113 19174 42,643 115 19188 14,000 115 19418 30,330 106 19773 69.167 117 20150 49,174 112 20435 37,174 115 20773 41,814 117 21434 57.065 110 21713 39.388 112 22014 36.857 112 22550 56,920 111 22939 53045 112 23329 49,787 115 23686 55,636 112 24323 76,440 112 25147 87,504 112 49338 112 99 99 37

.45 41 67 35 35 33 33 33 35 35 62 35 35 35 35 35 31 33 37 35 33 35 31 37 32 34 36 35 33 37 36 36 33 31 36 36 34 34 35 147 34 32 32 41 30 35 32 30 37 35 35 36 35 32 35 35 35 37 34 31 77 72 96 78 es 70 72 72 130 77 74 74 76 73 76 s0 78 77 85 84 74 82 84 S0 82 76 80 75 81 84 as 84 80 80 85 84 78 76 79 85 84 78 82 82 72 85 es 80 82 80 70 70 72 71 72 80 76 76 78 14 17 33 120 10 4

44 42 42 42 116?

38 38 7

39 36 32 34 35 31 30 36 30 30 32 34 34 35 38 30 28 28 26 31 31 29 32 33 35 34 28 28 35 33 33 34 32 44 35 35 30 42 42 39 41 43 32 36 36 34 10933.0 68 11351.0 64,303 50 11568.2 61,327 135 11762.3 40.159 209 11933.8 30.489 87 12012.7 51,178 88 12237.4 57,370 158 12394.7 51.018 160 12553.1 45,802 170 12638.1 41,500 170 12815.8 79,867 157 10 13228.5 6O,029 165 13260.8 55,371 154 13293.3 78,00o 167 13542.0 77,517 157 13838.3 74,855 167 14153.8 9Z341 168 14433.0 61,717 165 14789.7 74,136 165 14928.1 84,434 168 15289.5 75,423 168 15473.0 84,629 160 15729.1 70,899 165 15969.0 61,251 16297.2 74,309 16479.6 59,967 16765.1 68,520 13s67.8 28,503 17136.9 74,234 17395.8 81,521 17665.0 87,308 17847.7 46.647 16104.0 68,347 18326.5 49,444 18481.1 48.967 18678.3 46A59 18823.4 37,445 18977.0 49,152 19168.0 50,374 19383.1 5e.730 19585.8 52,310 164 19902.0 84,320 163 20230.5 70.393 163 20399.8 52,092 1e9 20442.1 84,s6 186 20764.0 84,897 169 20898.7 44.90 168 21071.0 44,948 168 21231.0 41,739 170 21444.0 s2,701 170 21914.0 81,151 188 22069.0 49,412 170 22303.0 52,408 170 22482.0 38,018 168 22630.4 40,473 168 22757.0 32,323 172 22915.0 49,247 171 23042.0 30,480 170 23175.0 28,248 169 58965 167 137 155 70

.4 118 117 47 45 35 35 48 25 40 51 38 38 38 37 40 40 37 37 45 40 41 42 42 36 39 36 37 37 35 35 37 35 35 37 37 33 34 35 36 38 46 86 155 161 87 87 152 160 165 165 155 165 160 160 167 160 182 182 182 158 158 160 76??

160 158 158 164 1e2 164 160 163 165 185 183 167 185 164 163 167 171 165 165 162 22

-16

-20 48 0

1 6

0 5

5 2

15 5

7 0

7 6

3 3

10 10 0

89?

4 7

5 5

4 5

6 5

5 5

5 3

5 4

5 S

0 5

4 5

Averages calculated from the period 100 -present wfth 7191 S 3894 data being discarded.

Weon Depth (t) Ar ine bingth (It) 1 250 147' 2

255 3

1800 4

1796 5

264 205' Eig Fish 175 Fire Prot 225 kdchexcehtGrourndwatar Drawdown XLSWELLS 07o10i03