ML19345C327
| ML19345C327 | |
| Person / Time | |
|---|---|
| Site: | Marble Hill |
| Issue date: | 11/25/1980 |
| From: | Shields S PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8012040400 | |
| Download: ML19345C327 (8) | |
Text
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PUBLIC SERVICE
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$"3 INDIANA T..
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o S. W. Shields 2
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,'n Senior Vice President.
November 25, 1980 Nuclear Division Docket Nos.: STN 50-546 Mr. James G. Keppler, Director STN 50-547 U. S. Nuclear Regulatory Commission Construction Permit Nos.:
Region III CPPR - 170 799 Roosevelt Road Glen Ellyn, Illinois 60137 CPPR - 171 Marble Hill Nuclear Generating Station - Units 1 and 2
Dear Mr. Keppler:
On August 6,1979, Mr. J. U. Bott of Public Service Company of Indiana, Inc. (PSI) notified your office of a potentially reportable item as required by 10 CFR 50.55(e). The major electrical contractor, Commonwealth-Lord J.V. installed temporary lighting in the Auxiliary Building by utilizing approximately 220 "Hilti" type shot-on studs. These studs were installed in embedded safety-related, grade A36, steel plates without an approved procedure or an evaluation as to the potential effects on the embedded plates. In most cases, these shot-on studs were placed on an edge or in a corner of an affected plate so as not -
to interfere with any permanent fixtures to be welded to the plate.
The studs were shot into the embedment plates by a.22 caliber or.45 caliber shell which drives the approximately 1/8" diameter stud shaft into the plate. When a stud is near an edge or a corner of a plate the affected embedment plate may not perform acceptably under design basis loading if an attachment is welded close to the stud.
To prevent recurrence of this problem Commonwealth-Lord was instructed not to place shot-on studs ir embedment plates in the future without prior written authorization from PSI and to perform any future installation in accordance with approved procedures. PSI has restricted the use of affected embedments in accordance with the recommendations of the architect-engineer, Sargent & Lundy. On-site contractors have been informed of the location of these studs and instructed on how to proceed when welding attachments to plates in which they have been installed.
The method for working in the vicinity of these studs is described in Attachment 1.
The location of studs is provided in Attachment 2.
Q 3
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4 801 0
P.O. Box 1?o 4Aashington, Indiana 47162
. 293.4441
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PUBUC SERVICE INCXANA Letter: James G. Keppler November 25, 1980 Contractor. implementation of these instructions will be monitored by Quality Assurance personnel.
This letter is intended to fulfill the requirements of a final report as defined in 10 CFR 50.55(e). If you have any~ questions on this matter,'please. feel free to contact me.
Sincerely, S. W. Shields TDG/cq Attachments cc: Director of Inspection and Enforcement
]
U. S. Nuclear Regulatory Commission j
Washington, D. C.
20555 J. J. Harrison E. R. Schweibinz, P.E.
~7 O
ATTACHMENT'1 Method 'for Using Embedment Plates in the Vicinity of "Hilti" Studs.
1.
Where the stud to edge of plate distance is 1 inch or more and does not interfere with the installation of other attachments to the plate, the stud is to remain in place. The embedment plate area around the stud can be used for attachment.
2.
Where the stud to edge of plate distance is less than 1 inch and does not interfere with the installation of other equipment, a liquid penetrant examination of the plate will be performed.
This examination will encompass the area within 1 inch of the shot-on stud. All linear indications will be reported to the responsible PSI engineer who will determine whether to repair
'this area or reject it from further use. -Repairs will be made by grinding'and welding. The repaired area-will once again be subjected to liquid penetrant examination. Linear indications greater.than 1/16-inch will res. ult in rejection and this area will be' legibly marked to restrict its use.
NOTE: Attachments may be made at a distance greater than 2 inches from a stud without performing an examination or repair.
3.
Studs which interfere with the installation of other attachments-to the plate will be_ removed to approximately flush with the base plate. The stud will be exca*:ated to a maximum depth of 1/3 the thickness of the plate. The excavation area and at least 1-inch of the adjacent base material shall be subject to a liquid penetrant examination. Linear indications greater than 1/16-inch shall be rejected and the area restricted from use.
7,m 4
9
ATTACHMENT 2 Paga 1 of 5 STUD NO.
MARK NO.
LOCATION i
2 SM27 4'-9 3/4" N of 15 Line/8'-9" E of S Line 3
5M22 9'-9 1/2" N of 15 Line/ll'-6" E of S Line 4
SM22 18'-11" N of 15 Line/15'-3 1/2" E of S Line 4
5 SM22 4'-6 1/8" N of 17 Line/14'-8" E of S Line 6
SM22 4'-6 1/8" N of 17 Line/2'-l 3/4" W of Q Line 7
63F6 4'-3" S of 16 Line/10'-1" E of S Line,
8 SM23
~ 8 '-6" N of 15 Line/2 '-5 1/2" E of S Line 9
5M22 4'-1 1/2" N of 13 Line/5'-l 1/2" W of M Line 10 SM22 6'-9" E of Q Line/2'-6 1/2" N of*18 Line 11 SM22 6'-9 3/4" E of Q Line/4 '-5" N of 19 Line 12 SM22 7'-2 1/4" E of Q Line/O'-3 3/4" N of 20 Line 13 SM16 7'-0" E of Q Line/2'-10" S of 21 Line 14 5M20 2'-9" E of Q/ Center Line 21 15 SM22 6'-9" E of Q Line/2'-ll" N of 21 Line 16 SM16 2'-2" W of P Line/2'-10 1/4" N of 18 Line 17 SM14 10'-3 3/4" E of P Line/N face of 18 Line Wall
+
18 SM56 6'-5" W of M Line/15'-6" N of 18 Line 19 SM22 6'-2 1/4" W of M Line/8'-6" N of 19 Line 20 SM22 14'-2 1/4" W of M Line/2'-3 3/4" N of 20 Line 21 SM22 9'-6" W of M Line/2'-7" S of 23 Line 22 63F6 3'-11" N of 19 Line/9'-9" E of Q Line 23 5M22 8'-3 3/4" S of 21 Line/3'-8" E of Q Line 24 1P2 6'-7" S of 15 Line/6'-6".W of Q Line 25 5M22 11'-l 1/2" E of Q Line/2'-9 3/4" N of 10 Line 26 5M22 12'-l 1/2" E of Q Line/7'-1/2" S of 11 4
Line 27 SM22 12'-2 3/4" E of Q Line/10'-5 1/2" N of 11 Line 28 5M22 12'-7 3/8" E of Q Line/15'-3/4" N of 11 Line 29 SM22 12'-8" E of Q'Line/2'-5 1/2" S of 12 Line 7
30 SM22 12'-11" E of Q Line/7'-l 7/8" N of 12 Line 31 SM22 12'-9" E of Q Line/2'-2 1/4" S of 13'Line 32 SM22 13'-4" E of Q Line/4'-2 1/4" N of 13 Line 33 SM22 13'-8" E of Q Line/l'-9 1/2" S of 15 Line 34 5M22 13'-7 1/4" E of Q Line/2 1/4" N of 16 Line, 35 5M22 13'-7 3/4" E of Q Line/2" S of 16 Line 36 SM22 13'-1" E of Q Line/11'-5 1/2" N of 15 Line 37 SM22 13'-5," E of Q Line/2 1/2" N of 16 Line
+
38 SM22 13'-8_1/2" E of Q Line/2 1/2" N of 16 Line 39 38Pl' 8'-1" E of Q Line/5'-1/8" N of 17 Line 40 SM38 8'-11" E'of Q Line/l'-9 3/4" S of 18 Line 41-SM16 22'-9" E of Q Line/7'-5 7/8" N of 15 Line 42 SM24 23'-6" E of Q Line/8'-2" N of 10 Line 43 5M22 11'-9" W of N Line/8'-4" N of 10 Line 44 SM22 10'-3" W of N Line/14'-2 1/4" N of 10 Line 45 5M22 9'-9" W of N Line/2" N of 10 Line l
. ATTACIMENT 2 Page 2 of 5 STUD uO.
- wuc NO.
LOCATION 46 SM25 8 '-2" W of N Line/10 '-3/4" N of 11 Line 47 5M22 B' W of N Line/7 '-3 5/8" 5 of 12 Line 48 SM22 8'-4" W of N Line/2'-9 3/4" N of 12 Line 49 SM22 75-9" W of N Line/6'-10 1/2" S of 13 Line 50 SM22 2'-2" N of 13 Line/8'-9 1/2" E of P Line 51 SM22 11'-5" N of 13 Line/8'-9 1/2" E of P Line 52 SM22 2'-11" N of 15 Line/8'-10" E of,P Line 53 SM22 4' N of 15 Line/9' E of P Line 54 5M22 7'-3" S ef 1G Line/8'-9 1/2" E of P Line 55 SM22 4 '-9" S of 16 Line/2 1/2" W of N Line -
56 SM23 7' S of 16 Line/l'-11" W of M Line 57 SM28 9'-9" S of 16 Line/1'-9 1/2" E of M Line 58 SM32 9'-9" S of 15 Line/8'-2 1/2" E of M Line 59 SM4 12' S of 16 Line/4'-7 1/2" W of L Line 60 SM38 12'-7" E of Q Line/2" N of 15 Line 61 SM38 3'-5" E of Q Line/2 1/2" N of 15 Line 62 SM22 12'-1/2" E of Q Line/10'-5 1/2" N of 11 Line 63 SM56 5'-7 3/4" N of 18 Line/9'-l 1/2" E of Q Line 64 5M25 8'-6 1/2" N of 18 Line/2'-9 1/2" E of Q s
Line 65 5M56 13'-7 1/4" N of 18 Line/9'-l 1/2" E of Q Line 66 SM56 15'-5 1/2" N of 18 Line/9'-l 1/2" E of Q Line 67 5M29 78-11" N of 19 Line/9'-l 1/2" E of Q Line 68 SM22 14'-0" W of P Line/2'-3 l'/2" N of 20 Line 69 5M20 2 1/2" S of 22 Line/12'-9 1/2" W of P Line 70 SM20 9" N of 22 Line/12'-9 1/2" W of P Line 71 5M22 11'-5" W of P Line/13'-11 1/2" N of 23 Line 72 SM22 l'-6" N of 24 Line/14'-2 1/4" W of P Line 73 SM22 16'-9" S of 25'Line/14'-2 1/2" W of P Line 74 5M21 5'-3".S of 25 Line/14'-2 1/2" W of P Line 75 SM22 22'-6" S of 26 Line/ll'-1/2" E of Q Line 76 5M22 11'-9" S of 26 Line/ll'.-3/4" E of Q Line 7
77 5M11 l'-6" S of 26 Line/ll'-3/4" E of Q Line 78 SM22 7'-6"'S of 26 Line/6'-11 1/4" W of N Line 79 SM25 22'-0" S'of 26 Line/7'-0" W of N Line 80 SM29 7'-11 1/2" E of P Line/13'-3/4" S of 25 Line 81 SM29 88-3" E of P Line/3'-11 1/4" N of 24 Line 82 38P2 5'-9" S of 24 Line/6'-9" E of P Line 83 5M12 7'-9" E of P Line/2'-10 1/2" N of 23 Line 84 SM22 10'-6" E of P Line/2'-8-3/4" S of 22 Line 85 SM22 8'-9" E of P Line/65-9 3/4" N of 20 Line 86 SM28 2'-2" W of P Line/2'-5 1/4" N of 20 Line 87 SM18 3'-8" W of M Line/6'-9 1/2" N of 20 Line 88 SM22
' 13'-6" N of 20 Line/6'-5 1/4" E of M Line 89 1P2 8'-9 1/4" E of M Line/l'-2 1/4" S of 22 Line-l 90 SM22 15'-10" W of L Line/4'-ll 1/2" S of 24 Line 91 SM22 16'-0" W'of L Line/5'-5 1/2" N of 24 Line 92 SM22 15'-2" W of L Line/16'-2 1/2" N of 24 Line 93 SM22 13'-9" W of L Line/2'-3 1/2" S of 25 Line 94 5M22 4'-6" N of 25 Line/15'-2" W of L Line
ATTACHMENT 2 Page 3 of 5 STUD NO.
MARK NO.
LOCATION 95 SM22 10'-3" S of 26 Line/4'-7" E of M Line 96 3M22 9'-8" S cf 26 Line/5'-2 1/4" W of M Line 97 SM54 3'-0" W of Q Line/10'-9 1/2" N of 15 Line 98 SM56 8'-3 1/2" W of V Line/3'-6" S of 19 Line 99 Sil27 2'-11 1/2" E of V Line/6'-10" S of 18 Line 100 5M23 7'-11 1/2" W of U Line/12'-6" N of 18 Line 101 SM29 7 '-11 1/2" W of U Line/7'-0" S of 18 Lira 102 SM42 l'-ll 1/2" E of U Line/128-3" N of 18 Line 103 SM56 6'-3 1/2" E of U Line/7'-10" S of 18 Line 104 5M50 6'-8" E of U Line/12'-3" N of 18 Line 105 5M56 11'-5" E'of U Line/ll'-6" N of 18 Line'
~~
106 SM56 6'-3 1/2" W of S Line/7'-11" S of 18 Line 107 5M25 l'-11 1/2" W of S Line/12'-3" N of 18 Line 108 SM56 6'-3 1/2" E of S Line/11'-10" N of 18 Line 109 SM56 6'-3 1/2" E of S Line/7'-10" S of 18 Line 110 SM56 6'-7" W of Q Line/8'-1" S of 18 Line 111 SM56 6'-11 1/2" W of Q Line/10'-0" N of 18 Line 112 SM10 4'-3" E of U Line/5'-8 1/2" N of 19 Line 113 SM42 19'-10" E of W Line/4'-8 1/2" S of 15 Line 114 SM10 l'-8" E of V Line/9'-5 1/2" E of 15 Line 115 SM22 6 '-2" W of U Line/9 '-1" S of 15 Line e
'116 SM40 l'-10" W of S.7 Line/8 '-8" S of 15 Line 117 5M22 5'-4" W of S Line/10'-8" S of 15 Line 118 SM20 18'-5" W of Q Line/10'-3 3/4"'S of 15 Line 119 5M22 13'-9" W of Q Line/10'-8 1/2" S of 15 Line 12d SM22 14'-0" W of Q Line/5'-2" S of 13 Line 121 SM22 3'-3",W of S Line/5'-2 1/4" S of 13 Line 122 SM23 l'-9" E of S.7 Line/5'-2".S of 13 Line 123 SM23 13'-0" W of S Line/5'-1/2" N of 12 Line 124 5M22 3'-9" W of S Line/5'-1/2" N of 12 Line 125 5M22 11'-3" W of Q Line/O'-2 5/8" S of 12 Line 126 SM19 4'-0" E of S Line/O'-2 1/4" S of 12 Line 127 5M28 14'-8" W of Q Line/5'-3 1/2" S of 12 Line 128
.5M24 13'-3" W of Q Line/10'-11 1/2" S of 12 Line 129 SM22 12'-3" W of Q Line/16'-3 1/2" S of 12 Line 130 SM22 9'-5" W of Q Line/5'-1".N cf 11 Line 131 SM40 7'.-9" W of Q Line/5'-10" S of 11 Line 132 SM6 ll'-3"'S of 15 Line/7'-9" E of Y Line 133 SM54 18 '-9" S of 15 Idne/4 '-6" W of X Line 134 SM10 5'-Q" W of W Line/14'-6 1/4" S of 15 Line 135 SM19 17'-9" N of 21 Line/2'-1/2" W of X Line 136 SM22 11'-9" W of Q Line/17'-ll" N of 15 Line 137 SM22 3'-0" N of 18 Line/7'-8 1/2" E of Q Line 138 SM22 2'-1/2" S of 19 Line/10'-0" E of Q Line 139 5M22 l'-3" N of 20 Line/9'-10 1/2" E of Q Line 140 SM22 2'-1/2" S of 21 Line/2'-0" E of Q Line l
141 38P1 0'-8" N of 21 Line, Elev. 370'/4'-1/2" E l
Face of Columns 21 and Q i
142 SM28 10'-6" N of 21 Line/9'-4" E of Q Line 143 SM28 2'-6" S of 23 Line/9'-5 1/2" E of Q Line 144 SM22 13'-0" E of Q Line/2'-1/2" S of 23 Line 145 SM3 9'-0" S of 24 Idne/12'-3/4" E of'Q Line l
146 5M28 9' S of 24 Line/18'-4 1/2" E of Q Line l
147 5M22 3 '-0" W of P Line/2 8-8 1/4" N of 24 Line r
l
i ATTACHMENT 2 Paga 4 of 5 i
l STUD NO.
MARK NO.
LOCATION 148
'5M6 0 '-6 W of P Line/9 '-5 1/2' % of 24 Line 149 1P2 13'-5 1/2" S of 25 Line/6'-3" E Of P Line 150 SM16 13'-9 3/4" S of 25 Line/O'-12" E of P Line 151 SM16 4'-2 1/2" S of 25 Line/l'-6" E of P Line i
152 SM22 10'-11 3/4" S of 26 Line/5'-0" W of N Line 153 SM22 3'-2 1/4" S of 26 Line/5'-6" W of P Line 154 5M23 10'-11" S of 26 Line/2'-0" W of M Line 155 38P1 6'-11 1/2" N of 24 Line/9'-3" W of M Line 19G SM22 2'-1/2" S of 23 Line/10'-0" W of M Line 157 8P1 0'-10" N of 23 Line/2'-8 3/4" W of N Line 158 SM22 2'10" S of 22 Line/11'-6" E of P Line' 159 5M14 0'-l 3/4" S of 22 Line/5'-3" W of M Line 160 5M22 2'-1" S of 20 Line/9'-9" E of M Line
~
161 SM22 4'-3 1/2" S of 19 Line/_0'-9" E of M Line 162 SM22 0'-5" E of Q Line/5'-5 1/2" S of 11 Line 163 SM22 18'-0" W of P Line/5'-5 1/2" S of 11 Line 164 SM22 12'-9" W of P Line/5'-5 1/2" S of 11 Line 165 SM22 9'-6" W of P Line/10'-1/2" S of 11 Line 166 SM22
'12'-5" W of P Line/5'-5 1/2" S of 11 Line 167 38P1 3'-6" N of 12 Line/ll'-10 1/4" W of P Line 168 SM22 4'-Q" S of 13 Line/13'-1/2" W of P Line 4
169 38P1 10'-6" W of P Line/l'-6" S of 16 Line 170 SM22 6'-0" N of 17 Line/13'-8 1/2" W of P Line 171 SM22 10'-3" E of P Line/O'-2 1/4" S of 16 Line 172 SM22 11'-0" E of P Line/6'-6 1/2" S of 16 Line 173
,38P1 2'-3 3/4" S of 15 Line/6'-0" W of N Line 174 SM22 10'-0" E of P Line/2'-2.3/4" S of 13 Line 175 SMll 2'-6" W of N Line/2'-3" S of 13 Line 176 5M22 7'-9" W of N Line/28-5 3/4" S of 13 Line 177 SM29 2*-6" W of N Line/7'-ll 1/2" N of 12 Line 178 SM29 7'-9" N of 12 Line/7'-9" W'of N Line 179 1P2 3" W of N Line N Face of Columns 12 and N, Elev. 373'-7" 180 5M22 7'-9" W of N Line/2'-5" S of 12 Line 181 1P2 9" W of N Line S Face of Columns 12 and N, Elev. 373'-5 1/2" 182 SM14 13'-9 1/2" N of 11 Line/2'-0" W of N Line
/
183 5M14 7'-8 1/2" N of 11 Line/5'-0" W'of N Line 184 1P2 2" W of N Line S Face of Columns 11 and N, Elev. 373'-5 1/2" 185 5M22 8'-0" W of N Line/2'-3" S of 11 Line 186 5M22 8'-0" W of N Line/68-2 1/2" N of 10 Line 187 SM22 2'-8" W of M Line/2'-1/4" N of 15 Line 188 5M22 3'-3" E of M Line/2'-2 1/4" S of 16 Line 189 38P1 13'-9" W of L Line/O'-10 1/2" N of 16 Line 190 SM22 13'-0" W of L Line/7'-1/2" S of 18 Line 191 SM22 5'-2 1/2" E of Q Line/3'-3" S of 13 Line 192 SM22 10'-2 1/2" E of Q Line/3'-3" S of 13 Line 193 SM22 15'-2 1/2" E of Q Line/3'-3" S of 13 Line 194 5M22 '
5'-1/2" W of P' Line/3'-3" S of 13 Line 195 38P1 11'-1/2" N of 10 Line/Elev. 390'-11 1/4" 196 38P1 2'-5 1/8"'S'of'll Line/Elev. 390'~~10" 197 38P1 11'-8 3/8" S of 12 Line/Elev. 391'-3" 198 1P1 8'-3 1/4" W of L Line/l'-2" N of 12 Line
ATTACHMENT 2 Paga 5 of 5 sTtlD NO.
MARK NO.
LOCATICN 199 5M12 2'-10" E of M Line/O'-1" N of 13 Line 200 5M29 10'-3" N of 21 Line/2'-3" E of W Line 201 5M22 9'-3" N of 21 Line/10'-5 1/2" E of W Line 202 SM42 8'-0" N of 21 Line/7'-2" W of V Line 203 5M42 7'-1/2" N of 21 Line/5'-6" W of V Line i
204 SM22 9'-6" N of 21 Line/4'-8" E of V Line 205 1P2 8'-8 1/4" N of 21 Line/9'-1/4" W of U Line 206 SM22 13 '-0" N of 21 Line/O '-3" W of U Line 207 SM22 9'-3" N of 23 Line/2'-1" W of S.7 Line 208 SM22 10'-6 1/2" N of 21 Line/5'-9" W of S Line,/
209 5M22 5'-5 3/4" N of 23 Line/8'-9" W of S Line 210 SM22 10'-0" N of 23 Line/9'-6" W of S Line 1
211 SM22 5'-3" S of 24 Lina /10'-0" W of S Line 212 SM22 10'-7 1/2" N of 21 Line/4'-0" E of S Line 213 SM22 10'-6" N of 21 Line/8'-3" E of S Line 214 SM22 0'-1/2" S of 23 Line/9'-9" E of S Line 215 5M22 11'-3" S of 24 Line/9'-9" E of S Line 216 SM22 0'-1/4" N of 24 Line/9'-10" E of S Line 217 SM23 6'-9 1/2" N of 24 Line/101-0" E of S Line 218 SM22 l'-1/4" N of 25 Line/9'-9" W of Q Line 219 SM22 7'-2" W of M Line/20'-9 1/2" N of 8 Line 4
220 SM26 l'-1" W of M Line/20'-9 1/2" N of 8 Line 221 1P2 0'-4 1/2" E of N Line/14'-10 3/4" N of 8 Line 222 SM26 l'-l 1/2" W of M Line/6'-6 3/4" N of 8 Line 223 1P2 5'-11 1/4" E of M Line/14'-10'3/4" N of 8 Line 224 SM21 7'-11" W of L Line/3'-10" N of 8 Line 225 SM22 3 '-7" W of Ii;.s Line/1'-9 7/8" S of 8 Line 226 SM21 3'-3" W of L Line/3'-10" N of 8 Line 227 5M21 3'-5" W of L Line/12'-2" N of S Line 228 SM21' 3'-5" W of L Line/20'-2 1/2" N of 8 Line 3
229 SM21 3'-5" W of L Line/27'-2 1/2" N of 8 Line i
230 SM21 7'-11" W of L.Line/27'-2 1/2" N of 8 Line 231 1P2 i
16'-l 1/2" W of P Line/5'-l 1/2" N of 24 Line 232 127P1 3'-5" W of P Line/10'-9" S of 25 Line 233 1P2 8'.-4 1/2" S of 25 Line/6'-5 1/2" E of P Line 234 125M15 8'-8 1/4" S of 5 Line/63'-3/4" W of W Line 235 125M15 8'-8 1/4" S of 5 Line/43'-5 3/4" W of W Line 23G 125M15 8'-8" S of 5 Line/15'-1 3/4" W of W Line i-237 125M15 8'-5 1/2" S of 5 Line/1'-2" W of W Line 238 125N15 8 '-3 1/2" S of 5 Line/12'-ll" E of W Line 239 125M15 8'-7 3/4" S of 5 Line/40'-1/4" E of W Line 240 125M15
.8'-4" S of 5 Line/37'-6 3/4" W of-Q Line 241 125M15 8'-8 1/4" S of 5 Line/23'-7 1/4" W of Q Line 242 Stud shot on' concrete slab 243 SM22 0'-2 1/2" E of P Line/3'-3">S of'13 Line 244-IP2 Wall 5'-1/4" S of 12 Line/Elev. 394'-3 1/2"
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