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| number = ML091190090 | | number = ML091190090 | ||
| issue date = 10/21/2008 | | issue date = 10/21/2008 | ||
| title = E-mail from J. Richmond of | | title = E-mail from J. Richmond of USNRC to J. Kulp and S. Pindale of USNRC, Regarding Drawing Attached for Oc Outage Inspection Plan | ||
| author name = Richmond J | | author name = Richmond J | ||
| author affiliation = NRC/RGN-I/DRS/EB1 | | author affiliation = NRC/RGN-I/DRS/EB1 | ||
| addressee name = Kulp J | | addressee name = Kulp J, Pindale S | ||
| addressee affiliation = NRC/RGN-I/DRP/PB6, NRC/RGN-I/DRS/EB2 | | addressee affiliation = NRC/RGN-I/DRP/PB6, NRC/RGN-I/DRS/EB2 | ||
| docket = 05000219 | | docket = 05000219 | ||
Line 16: | Line 16: | ||
=Text= | =Text= | ||
{{#Wiki_filter:John Richmond From: Sent: To: Cc: | {{#Wiki_filter:John Richmond From: John Richmond - | ||
Sent: Tuesday, October 21, 2008 1:30 PM To: Jeffrey Kulp; Stephen Pindale Cc: Ronald Bellamy; Scott Barber; Marc Ferdas; Michael Modes; Timothy OHara; Richard Conte | |||
==Subject:== | ==Subject:== | ||
Drawing attached for RE: OC Outage Inspection Plan Attachments: OC View from inside Drywell.jpg; OC Drywell Elevation & Regions.bmp; OC Drywell Key Plan.jpg; OC Drywell Liner Thicknesses.jpg; OC Drywell Support Structure.jpg; OC Drywell Trench, Bay-5.jpg; OC Drywell Trench, Bay-1 7.jpg; OC Drywell X-section.jpg; OC Rx Cavity Detail.jpg; OC Rx Cavity Trough Drain Detail.jpg; OC Sandbed Detail-i .jpg; OC Sandbed Detail-2.jpg; OC Sandbed, Trench, & Sump.jpg All of the attached drawings came from Public Records (ACRS & ASLB presentations). | |||
These drawings may be helpful when discussing various drywell issues. | |||
& Regions.bmp; OC Drywell Key Plan.jpg; OC Drywell Liner Thicknesses.jpg; OC Drywell Support Structure.jpg; OC Drywell Trench, Bay-5.jpg; OC Drywell Trench, Bay-1 7.jpg; OC Drywell X-section.jpg; OC Rx Cavity Detail.jpg; OC Rx Cavity Trough Drain Detail.jpg; OC Sandbed Detail-i .jpg; OC Sandbed Detail-2.jpg; OC Sandbed, Trench, & Sump.jpg All of the attached drawings came from Public Records (ACRS & ASLB presentations). | From: John Richmond Sent: Monday, September 29, 2008 2:04 PM To: Marc Ferdas; Jeffrey Kulp Cc: Stephen Pindale; Ronald Bellamy; Scott Barber | ||
These drawings may be helpful when discussing various drywell issues.From: John Richmond Sent: Monday, September 29, 2008 2:04 PM To: Marc Ferdas; Jeffrey Kulp Cc: Stephen Pindale; Ronald Bellamy; Scott Barber | |||
==Subject:== | ==Subject:== | ||
OC Outage Inspection Plan Marc/Jeff, can you include the following License Renewal items in the Resident Outage Inspection Plan?1. As soon as reasonably achievable after the Drywell is opened, verify condition of both D/W Trenches (dry, wet, water stains, etc.). Pictures are optional, but always nice.2. Within about 1-shift after the cavity is flooded up, verify the reactor cavity trough drain leakage rate (we do expect some leakage). | OC Outage Inspection Plan Marc/Jeff, can you include the following License Renewal items in the Resident Outage Inspection Plan? | ||
After the initial check, continue to check it, about once per day, for a day or two, to see if the leakage rate changes. During | : 1. As soon as reasonably achievable after the Drywell is opened, verify condition of both D/W Trenches (dry, wet, water stains, etc.). Pictures are optional, but always nice. | ||
Thanks John Richmond Received: | : 2. Within about 1-shift after the cavity is flooded up, verify the reactor cavity trough drain leakage rate (we do expect some leakage). After the initial check, continue to check it, about once per day, for a day or two, to see if the leakage rate changes. During 1R21 (2006), the continuous leakage was identified at about 1 gpm, while the cavity was flooded. | ||
from R1CLSTRO1 .nrc.gov ([148.184.99.7]) | : 3. Within about 1-shift after the cavity is flooded up, verify the 5 D/W sandbed drains, drain collection bottles. | ||
by R1 MS01 .nrc.gov ([148.184.99.10]) | No water or leakage is expected. | ||
with mapi; Tue, 21 Oct 2008 13:29:47 -0400 Content-Type: | : 4. AmerGen is to apply a strippable coating, as a sealant, in the reactor cavity prior to flood up, to limit cavity seal leakage that could end up in the sandbed area. While you are welcome to observe or inspect this item, my team will verify this item, by a records review, after we arrive on-site. | ||
application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: | : 5. During this outage, AmerGen is suppose to replace some ESW pipe. I understand the pipe has already been laid/installed, and is waiting to be "tied-in" during the outage. Did the Residents observe any portion of the new EtSW pipe installation? | ||
binary From: John Richmond <John. Richmond@nrc.gov> | Thanks John Richmond | ||
To: Jeffrey Kulp <Jeffrey.Kulp@nrc.gov>, Stephen Pindale<Stephen. | |||
Pindale@nrc.gov> | Received: from R1CLSTRO1 .nrc.gov ([148.184.99.7]) by R1 MS01 .nrc.gov | ||
CC: Ronald Bellamy <Ronald.Bellamy@nrc.gov>, Scott Barber<Scott.Barber@nrc.gov>, Marc Ferdas <Marc.Ferdas@nrc.gov>, Michael Modes<Michael.Modes@nrc.gov>, Timothy OHara <Timothy.OHara@nrc.gov>, Richard Conte<Richard. | ([148.184.99.10]) with mapi; Tue, 21 Oct 2008 13:29:47 -0400 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: John Richmond <John. Richmond@nrc.gov> | ||
Conte@nrc.gov> | To: Jeffrey Kulp <Jeffrey.Kulp@nrc.gov>, Stephen Pindale | ||
Date: Tue, 21 Oct 2008 13:29:44 -0400 | <Stephen. Pindale@nrc.gov> | ||
CC: Ronald Bellamy <Ronald.Bellamy@nrc.gov>, Scott Barber | |||
<Scott.Barber@nrc.gov>, Marc Ferdas <Marc.Ferdas@nrc.gov>, Michael Modes | |||
<Michael.Modes@nrc.gov>, Timothy OHara <Timothy.OHara@nrc.gov>, Richard Conte | |||
<Richard. Conte@nrc.gov> | |||
Date: Tue, 21 Oct 2008 13:29:44 -0400 | |||
==Subject:== | ==Subject:== | ||
Drawing attached for RE: OC Outage Inspection Plan Thread-Topic: | Drawing attached for RE: OC Outage Inspection Plan Thread-Topic: Drawing attached for RE: OC Outage Inspection Plan Thread-Index: AckiXbveQcOAazRyQ8uNcVdUr4+eVgRRFfBQ Message-ID: <2856BC46F6A308418F033D973BBOEE72AA2A4DC877@R1CLSTRO1 .nrc.gov> | ||
Drawing attached for RE: OC Outage Inspection Plan Thread-Index: | |||
AckiXbveQcOAazRyQ8uNcVdUr4+eVgRRFfBQ Message-ID: | |||
<2856BC46F6A308418F033D973BBOEE72AA2A4DC877@R1CLSTRO1 .nrc.gov> | |||
==References:== | ==References:== | ||
<2856BC46F6A308418F033D973BBOEE72969755C4FC@R1CLSTRO1 .nrc.gov> | |||
In-Reply-To: <2856BC46F6A308418F033D973BBOEE72969755C4FC@R1CLSTRO1 .nrc.gov> | |||
Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-Exchange-Organization-SCL: -1 X-MS-TNEF-Correlator: | |||
<2856BC46F6A308418F033D973BBOEE72AA2A4DC877@R1 CLSTR01.nrc.gov> | |||
MIME-Version: 1.0 | |||
VIEW FROM INSIDE DRYWELL UPPER CURB - EL. 12'.3" TOP OF SANDBED | |||
. _jL Al A1. | |||
0 El E 8i ,7 4 LOWER CURB A6 A A A 4 | |||
*7 *7 A A 11'-0" | |||
<1 A DRYWELL FLOOR - EL., 10'-3" | |||
REACTOR BUILDING, DRYWELL SUPPORT STRUCTURE | |||
-I-- | |||
I CONTAINMENT SHELL SANDBED REGION---\ EL. 23'-6" GRADE EL. 23'-6" J | |||
&REACTOR VESSEL CURB DRYWELL FLOOR | |||
~/ | |||
EL. 10'-3" | |||
-EL. 5'-D" LIMIT OF TORUS - MEMBRANE L | |||
1" . L-EL. 4'-6"" | |||
WATERPROOFING N' | |||
,1 MEMBRANE WATERPROOFING (TYP ALL AROUND) | |||
. .- PEDESTAL - WATER STOP (TYP) | |||
TYGON ALL AROUND) | |||
TUBING | |||
¸---.--'i -' | |||
,.- I P Uh MAI 4> | |||
* EL. _l9-j A-A 5 GALLON io,-o- *POLY BOTTLE 1 4r44 | |||
-CONCRETE MAT I *.* I '~4Z A:' | |||
-. A .' A *~' -A ~ | |||
L 43'-6" EMEMBRANE WATERPROOFING LEVELING SLAB | |||
REACTOR CAVITY STAINLESS STEEL LINER---- | |||
CONCRETE | |||
*SEE DETAIL "B'L----\ | |||
REACTOR VESSEL DRYWELL AND REACTOR CAVITY SECTION DETAIL "A" | |||
Head Iso Elevation 94'-9" View Cy 00 Azimut | |||
.900 AzimL Elevation 71'-10" 2700 Azin Elevation 65'-4" "L.- Knuc 50'-11 ' Uppe | |||
--- Mid( | |||
tion 37'43 Per! | |||
ition 27'-6" & Equ | |||
.tion 23'-6" H Lower CVer (10 | |||
\ | |||
4 | |||
.4 TOP OF SANDBED EL. 12'-3" & UPPER CURB LOWER CURB EL. 11-DRYVA WALL | |||
*t A | |||
FLOOR EL. 10'-3" 44 4 4, 4. | |||
4 . 4 4 | |||
-. .4 | |||
;~* 4 | |||
-. A REG ION .4 4. | |||
4 | |||
:4 4 4'. | |||
.4 ' 4" | |||
"*,o EL. 8'-99 EXCAVATION 4 4 | |||
''4' | |||
.4 4. | |||
4/ " | |||
,t, | |||
* 4.44 .4 A 4 A | |||
.4 A | |||
BAY 5 -TRENCH | |||
.4 4 4. | |||
4 44 | |||
.4 | |||
.4' 4 4 44 A'' ~. | |||
4..4 | |||
.4. 4 4' | |||
4. | |||
.4_ 44 ~ . | |||
4. | |||
.4 :4 4 | |||
4 4 | |||
4 4.. .4, 4 | |||
. 4 4. 4 4 4 | |||
A 4 . | |||
#, 4 4a | |||
DRYWELL TO REACTOR CAVITY SEAL DETAIL DETAIL 'B' OBSERVEDDAMAGE-AT LIP OF TROUGH CORRECTED IN 1988 | |||
EL, 87'-6" (12) | |||
F EL. 51f-.1O (8.9)/ | |||
TRENH .. EL. 60'-1 (100) | |||
NOTE: | |||
NUMBERS IN PARENTHESES, REFER TO.THE ATTACHEDGRAPH IDENTIFCATION NUMBERS KEY PLAN | |||
TOD OF SANDBED EL. 12"--3" & UPPER CURB LOWER CURB EL. 11'-0" DRYWELL WALL FLOOR EL. 10'-Y" 4 4 .4 | |||
;4- | |||
>4 4 4, ' | |||
h,' 4. 4 4.. 4 A | |||
.4 4 | |||
SANDBED | |||
'4 REGION EL. 9'-3 .4 | |||
.4 3/4 4> 4 4 - .4 4 '.4' A 4 44 4. | |||
'0. | |||
: 4. .4 47 A' ~ 4 . | |||
4, .4 4 '4 4 4 4 4- 4. 4 44 | |||
* AY 17 - RNC' 44 | |||
.4' 44 A | |||
4' 4.4. ~ | |||
4' 4 44' A ,, | |||
"'.4 | |||
: 4. 4 4 4 4,. 4 | |||
.,A A ~ 4. | |||
'4 . 4 | |||
,4'4 , .4 | |||
.4' 4 '. 44, 4 4 '. .4 4 4. | |||
LOWER DRYWELL/SANDBED REGION NOTE: | |||
LEAKAGE PATH FROM OUTER DRYWELL TO OUTER DETAIL C SANDBED SHELL / | |||
SANDBED REGION 15"> | |||
.BOTTOM F SANDBED | |||
° -l E , | |||
DRYWE.LL | |||
/_ N EL. 87'-5" | |||
'7,. UT READINGS IN THIS AREA EL. 51'-10" ___EL. 60'- 10" | |||
,, UT READINGS IN THIS AREA EL. 50'-2" UT READINGS IN THESE AREAS EL. _12'-,3" EL. 8'- 11 TOP OF SANDBED BOTTOM OF SANDBED SUPPORT SKIRT - | |||
(SEE DETAIL 1) 1.154" UT READINGS IN THIS AREA- | |||
-' | DETAIL WA" DETAIL "B' DETAIL 'C' | ||
i 6 | |||
SURE PLATE SAND BED AREA 0.770" THK EL. 12'-3"- | |||
TOP OF SANDBED & UPPER CURB RADIUS = 19'-5 7/16" 1.154" THK PLATE EL. 8'-1 1" STABILIZING RING - EL. 8'--1 " | |||
EL. 6.'-10 5/16'---- | |||
4' DRAIN PIPE (5 PLACES) 0.676" THK PLATE | |||
( DRYWELL BOTTOM I | |||
-EL. 2'-3" 1/2" PLATE | |||
-- -EL. (-)0'-1" SECTIONAL VIEW OF SAND BED AREA AT VENT PIPE | |||
LOWER DRYWELL-SANDBED, TRENCH & SUMP ELEVATION LOOKING WEST}} | |||
Latest revision as of 02:40, 22 March 2020
ML091190090 | |
Person / Time | |
---|---|
Site: | Oyster Creek |
Issue date: | 10/21/2008 |
From: | Richmond J Engineering Region 1 Branch 1 |
To: | Jeffrey Kulp, Stephen Pindale NRC/RGN-I/DRP/PB6, Engineering Region 1 Branch 2 |
References | |
FOIA/PA-2009-0070 | |
Download: ML091190090 (15) | |
Text
John Richmond From: John Richmond -
Sent: Tuesday, October 21, 2008 1:30 PM To: Jeffrey Kulp; Stephen Pindale Cc: Ronald Bellamy; Scott Barber; Marc Ferdas; Michael Modes; Timothy OHara; Richard Conte
Subject:
Drawing attached for RE: OC Outage Inspection Plan Attachments: OC View from inside Drywell.jpg; OC Drywell Elevation & Regions.bmp; OC Drywell Key Plan.jpg; OC Drywell Liner Thicknesses.jpg; OC Drywell Support Structure.jpg; OC Drywell Trench, Bay-5.jpg; OC Drywell Trench, Bay-1 7.jpg; OC Drywell X-section.jpg; OC Rx Cavity Detail.jpg; OC Rx Cavity Trough Drain Detail.jpg; OC Sandbed Detail-i .jpg; OC Sandbed Detail-2.jpg; OC Sandbed, Trench, & Sump.jpg All of the attached drawings came from Public Records (ACRS & ASLB presentations).
These drawings may be helpful when discussing various drywell issues.
From: John Richmond Sent: Monday, September 29, 2008 2:04 PM To: Marc Ferdas; Jeffrey Kulp Cc: Stephen Pindale; Ronald Bellamy; Scott Barber
Subject:
OC Outage Inspection Plan Marc/Jeff, can you include the following License Renewal items in the Resident Outage Inspection Plan?
- 1. As soon as reasonably achievable after the Drywell is opened, verify condition of both D/W Trenches (dry, wet, water stains, etc.). Pictures are optional, but always nice.
- 2. Within about 1-shift after the cavity is flooded up, verify the reactor cavity trough drain leakage rate (we do expect some leakage). After the initial check, continue to check it, about once per day, for a day or two, to see if the leakage rate changes. During 1R21 (2006), the continuous leakage was identified at about 1 gpm, while the cavity was flooded.
- 3. Within about 1-shift after the cavity is flooded up, verify the 5 D/W sandbed drains, drain collection bottles.
No water or leakage is expected.
- 4. AmerGen is to apply a strippable coating, as a sealant, in the reactor cavity prior to flood up, to limit cavity seal leakage that could end up in the sandbed area. While you are welcome to observe or inspect this item, my team will verify this item, by a records review, after we arrive on-site.
- 5. During this outage, AmerGen is suppose to replace some ESW pipe. I understand the pipe has already been laid/installed, and is waiting to be "tied-in" during the outage. Did the Residents observe any portion of the new EtSW pipe installation?
Thanks John Richmond
Received: from R1CLSTRO1 .nrc.gov ([148.184.99.7]) by R1 MS01 .nrc.gov
([148.184.99.10]) with mapi; Tue, 21 Oct 2008 13:29:47 -0400 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary From: John Richmond <John. Richmond@nrc.gov>
To: Jeffrey Kulp <Jeffrey.Kulp@nrc.gov>, Stephen Pindale
<Stephen. Pindale@nrc.gov>
CC: Ronald Bellamy <Ronald.Bellamy@nrc.gov>, Scott Barber
<Scott.Barber@nrc.gov>, Marc Ferdas <Marc.Ferdas@nrc.gov>, Michael Modes
<Michael.Modes@nrc.gov>, Timothy OHara <Timothy.OHara@nrc.gov>, Richard Conte
<Richard. Conte@nrc.gov>
Date: Tue, 21 Oct 2008 13:29:44 -0400
Subject:
Drawing attached for RE: OC Outage Inspection Plan Thread-Topic: Drawing attached for RE: OC Outage Inspection Plan Thread-Index: AckiXbveQcOAazRyQ8uNcVdUr4+eVgRRFfBQ Message-ID: <2856BC46F6A308418F033D973BBOEE72AA2A4DC877@R1CLSTRO1 .nrc.gov>
References:
<2856BC46F6A308418F033D973BBOEE72969755C4FC@R1CLSTRO1 .nrc.gov>
In-Reply-To: <2856BC46F6A308418F033D973BBOEE72969755C4FC@R1CLSTRO1 .nrc.gov>
Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-Exchange-Organization-SCL: -1 X-MS-TNEF-Correlator:
<2856BC46F6A308418F033D973BBOEE72AA2A4DC877@R1 CLSTR01.nrc.gov>
MIME-Version: 1.0
VIEW FROM INSIDE DRYWELL UPPER CURB - EL. 12'.3" TOP OF SANDBED
. _jL Al A1.
0 El E 8i ,7 4 LOWER CURB A6 A A A 4
- 7 *7 A A 11'-0"
<1 A DRYWELL FLOOR - EL., 10'-3"
REACTOR BUILDING, DRYWELL SUPPORT STRUCTURE
-I--
I CONTAINMENT SHELL SANDBED REGION---\ EL. 23'-6" GRADE EL. 23'-6" J
&REACTOR VESSEL CURB DRYWELL FLOOR
~/
EL. 10'-3"
-EL. 5'-D" LIMIT OF TORUS - MEMBRANE L
1" . L-EL. 4'-6""
WATERPROOFING N'
,1 MEMBRANE WATERPROOFING (TYP ALL AROUND)
. .- PEDESTAL - WATER STOP (TYP)
TYGON ALL AROUND)
TUBING
¸---.--'i -'
,.- I P Uh MAI 4>
- EL. _l9-j A-A 5 GALLON io,-o- *POLY BOTTLE 1 4r44
-CONCRETE MAT I *.* I '~4Z A:'
-. A .' A *~' -A ~
L 43'-6" EMEMBRANE WATERPROOFING LEVELING SLAB
REACTOR CAVITY STAINLESS STEEL LINER----
CONCRETE
- SEE DETAIL "B'L----\
REACTOR VESSEL DRYWELL AND REACTOR CAVITY SECTION DETAIL "A"
Head Iso Elevation 94'-9" View Cy 00 Azimut
.900 AzimL Elevation 71'-10" 2700 Azin Elevation 65'-4" "L.- Knuc 50'-11 ' Uppe
--- Mid(
tion 37'43 Per!
ition 27'-6" & Equ
.tion 23'-6" H Lower CVer (10
\
4
.4 TOP OF SANDBED EL. 12'-3" & UPPER CURB LOWER CURB EL. 11-DRYVA WALL
- t A
FLOOR EL. 10'-3" 44 4 4, 4.
4 . 4 4
-. .4
- ~* 4
-. A REG ION .4 4.
4
- 4 4 4'.
.4 ' 4"
"*,o EL. 8'-99 EXCAVATION 4 4
4'
.4 4.
4/ "
,t,
- 4.44 .4 A 4 A
.4 A
BAY 5 -TRENCH
.4 4 4.
4 44
.4
.4' 4 4 44 A ~.
4..4
.4. 4 4'
4.
.4_ 44 ~ .
4.
.4 :4 4
4 4
4 4.. .4, 4
. 4 4. 4 4 4
A 4 .
- , 4 4a
DRYWELL TO REACTOR CAVITY SEAL DETAIL DETAIL 'B' OBSERVEDDAMAGE-AT LIP OF TROUGH CORRECTED IN 1988
EL, 87'-6" (12)
F EL. 51f-.1O (8.9)/
TRENH .. EL. 60'-1 (100)
NOTE:
NUMBERS IN PARENTHESES, REFER TO.THE ATTACHEDGRAPH IDENTIFCATION NUMBERS KEY PLAN
TOD OF SANDBED EL. 12"--3" & UPPER CURB LOWER CURB EL. 11'-0" DRYWELL WALL FLOOR EL. 10'-Y" 4 4 .4
- 4-
>4 4 4, '
h,' 4. 4 4.. 4 A
.4 4
SANDBED
'4 REGION EL. 9'-3 .4
.4 3/4 4> 4 4 - .4 4 '.4' A 4 44 4.
'0.
- 4. .4 47 A' ~ 4 .
4, .4 4 '4 4 4 4 4- 4. 4 44
- AY 17 - RNC' 44
.4' 44 A
4' 4.4. ~
4' 4 44' A ,,
"'.4
- 4. 4 4 4 4,. 4
.,A A ~ 4.
'4 . 4
,4'4 , .4
.4' 4 '. 44, 4 4 '. .4 4 4.
LOWER DRYWELL/SANDBED REGION NOTE:
LEAKAGE PATH FROM OUTER DRYWELL TO OUTER DETAIL C SANDBED SHELL /
SANDBED REGION 15">
.BOTTOM F SANDBED
° -l E ,
DRYWE.LL
/_ N EL. 87'-5"
'7,. UT READINGS IN THIS AREA EL. 51'-10" ___EL. 60'- 10"
,, UT READINGS IN THIS AREA EL. 50'-2" UT READINGS IN THESE AREAS EL. _12'-,3" EL. 8'- 11 TOP OF SANDBED BOTTOM OF SANDBED SUPPORT SKIRT -
(SEE DETAIL 1) 1.154" UT READINGS IN THIS AREA-
DETAIL WA" DETAIL "B' DETAIL 'C'
i 6
SURE PLATE SAND BED AREA 0.770" THK EL. 12'-3"-
TOP OF SANDBED & UPPER CURB RADIUS = 19'-5 7/16" 1.154" THK PLATE EL. 8'-1 1" STABILIZING RING - EL. 8'--1 "
EL. 6.'-10 5/16'----
4' DRAIN PIPE (5 PLACES) 0.676" THK PLATE
( DRYWELL BOTTOM I
-EL. 2'-3" 1/2" PLATE
-- -EL. (-)0'-1" SECTIONAL VIEW OF SAND BED AREA AT VENT PIPE
LOWER DRYWELL-SANDBED, TRENCH & SUMP ELEVATION LOOKING WEST