SW4240401_Plansheet - SCM Detail_20241018

Table 12-2
Sample Operation and Maintenance Provisions for Bioretention Areas fzEV 15I ONS
MA I HANG GUI I NES: ■■ ■■
- 81DRETENTION FACILITIES NICE REQUIRE A REASONABLE AMOUNT OF ROUT€NE MAINTENANCE (NOT TOO BMI'element: Potential problems: How toremediate the problem: r / r III/ r
DIFI ERI NT FROM CONVENTIONAL LANDSCAPING MAINTENANCE) TO ENSURE THAT THE SYSTEM BOTH \ C\ \ I j\ (� REV.: Od 02-24, NCDEQ COMMENTS
FUNCTIONS WELL AS A 5TORMWATER BMP AND MAINTAINS AN AESTHETIC ELEMENT COMPATIBLE WITH The entire BIYII' Trash/debris is present. Remove the trash/debris. --- ^
Oil
The perimeter of the Areas of sail and/or Re ade the soil if necessary to ��
THE1RROUNDfNG LAND U5E5. p I:Zl d "� e ` !'! \ REV.: 97-31-24, NCDEQ COMMENTS
CC) 10
biorc.tenlion cell erosive gullies have formed. remove the gully,and then plant a �-� �' -� o \ CrJ Q]
- BIORETENTION FACiLIT1E5 SHOULD BE +NSPEGTEI7 ON A SEMf-ANNUAL BA515 FOR THE FIRST YEAR,AND ground cover and water until it is \ \
AFTER MAJOR STORM EVENTS. AFTER THE FIRST YEAR,ANNUAL. INSPECTIONS 5HDULD BE SUFFICIENT, established. Provide time and a \ \ !J N(Y1EQ
- THE FOLLOWING GENERAL MAINTENANCE GUIDEANGE IS RECOMMENDED FOR BIORETENTION 5Y5TEM5: one-time fertilizer a liation. _ AI
V \
PLANTING �J'O I I BEV C The inlet device: pipe, The pipe is clogged(if Unclog the pipe. Dispose of the � \ ^ �
" stone verge or swale a livable). sediment off-site. `t THE SOILS OF THE PLANTING t3EC1 SHOULD BE TESTED ON AN ANNUAL 13A515 FOR pH TO ESTABLISH �I
The pipe is cracked or Replace the pipe. ^AGIDIG LEVELS, fF THE pH 15 BELOW 5.2, LIMESTONE SHOULD BE APPLIED. IF THE pH 15 ABOVE P P p P p � O � `� � � Q �
otherwise damaged (i# (\ ^ FEN
\
-i.0 TO b.0, IRON SULFATE PLUS SULFUR CAN BE ADDED TO REriUGE pH. applicable). � \ '1 \ � $ 7. 5
U- THE SOIL BED MAY EXPERIENCE 50ME EROSION,PARTICULARLY AT THE INFLOW POINTS, PERIODIC \ Z \
INSPECTION AND CORRECTION OF FRO51ON MAY BE NEGESSARY. E;rosi.on is occurring in the Regrade the swale if necessary'to A , ^ � FFEam.-',
a 4Swale rf a livable). smooth it over and rovide erosion- THE SURFACE DF THE E3ED MAYBEGONE GLOGC�ED WITH FINE SEDIMENTS OVER TIME. GORE AERATION ( PP p --- Rp
2
OR CULTIVATING OF UNVEGETATED AREAS MAY T3E REQUIRED TO EN5L11RE ADEQllATE FI TRATION.
control devices such as reinforced � - -
/�
turf matting or riprap to avoid
r \ \ a G
PRETREATMENT NFLOPS LOGATION5. AND O rge is clogged or Remove sediment and clogged
N future problems with erosion. n'
Y� 1-Q Stone ve
- THE VEGETATED D FILTERR I STRIP DR C�RA55ED CHANNEL 5HOULD BE IN5PECTED FOR EROSION RILL OR covered in sediment(if stone and replace with clean stone. 4 Q
6ULLEY5 AND GDRREGTED AS NEEDED. BARE AREAS SHOULD BE SEEDED,OR SODDED,AS NECESSARY. applicable). I�I T'�/l'St>� I v/
- THE INFLOW LOCATION SHOULD BE INSPECTED ANNUALLY FOR CLOGGING. SEDIMENT BUILD-UP 15 A BMP element: Potential oblems: How to rernediate the problem., I 1 I L/� 111 /�r��� e a tl GG OPEN
G
COMMON PROBLEM WITH MANY PRACTICES NERE RUNOFF LEAVES AN IMPERVIOUS SURFACE AND The pretreatment area Flow is bypassing Regrade if necessary to route all BUFFER I ARD - ( _^4 l ` E Q8
ENTERS A VEGETATIVE OR EARTHEN SURFACE. ANY BUILD-UP 5FDfMENT SHOULD BE REMOVED TO 1�"// e SPACE
��r V
AVOID RUNOFF BY-PASSING THE FACILITY. pretreatment area and/or flow to the pretreatment area. GONSISTS OF LEYLANID GYPRE55 ° < E }
gullies have formed. Restabilire the area after grading. TREES PLANTED 8' O.G. $ AT LEAST -� _- THE OVERFLOYJ STRUCTURE SHOULD H INSPECTED ANNUALLY TO ENSURE THAT IT 15 FUNGTIONINC�. Sediment has accumulated Search for the source of the 6' TALL AT TIME PLANTING
AGGUMULA"EF�7 Ti2ASH AND DEBRIS SHOULD BE REMOVED D A5 NECESSARY.
to a depth greater than three sediment and remedy the problem L.J,�`T"! (I �j���� d- g a - �•✓ ( �� e QA�,. "tnl�y�y
inches. if possible. Remove the sediment a
and restabilize the pretreatment O e
TABLE 1.0: MATERIAL 5PEGIEIGATI ON5 a
MCA.
VALLEY
/ I I C�/
Trosion has occurred. Provide additional erosion � 00 LIJ 4 s �V� � v ALLE E $ /
PARAMETER SPEGIFIGATION 51ZE NOTES protection such as reinforced turf l D.I. a ' �tGj S�� \ C&C j i !
r� ,
matting or riprap if needed to \ e / L q� h A h i n }
PL.ANTIN6 501L REFER TO NCDEQ STORMWATER MANUAL N/A prevent future erosion problems. (TYP,) / 1^ ACCESS
IYIYi N T -
FLANTIN65 REFER TO NCDEQ STORMINATER MANUAL VARIES N/A Weeds are present. Remove the weeds,preferably by � BEGIN PROP. � ~ � VALLEY
' CCESS E M'T � ZV Q
AGED 6 TO 12 hand. C J
MULCH SHREDDED HARONOOD N/A MONTHS, MINIMUM The bioretention cell: Best professional practices Prime according to best 5 1 °
p a \ RETAINING G1�1 ao C&C a .a 4 "
ACTED b TD 12 vegetation show that pruning is needed professional practices. �" u.
PEA GRAVEL to:maintain optimal plant WALL " Q) �y � Z 1 t} (N
USE GLEAN L ANK health. TW: 986.0 a \ a j 4 a a e }- z 1--
CURTAIN ry
DIAPHRAGM AND ASTM D 448 SIZE NO. b VAR�I S RUN RIVER PEA I
DRAIN (APPROX.IIa•-u4^) Plants are dead,diseased or Determine the source of the to�LcTIN: 986.0 BIN: 981,0
GRAVEL dying, problem: soils,hydrology,disease, 13% 984.0
UNDERD ,AIN #t 5-1 STONE 1/2 - 2" USE GLEAN t3ANK- etc. Remedy the problem and _CI � `�r I -� ��UE QVE A O � -� " d e. iX m
GRAVEL RUN RIVER PEA replace plants. Provide a one-time D E " " A L K PROP. M-CELL �, � � [� �111
GRAVEL fertilizer application to establish - QN 6" � ' � ° o
`X. �J D TI \K AL END a OP. LL
the ground cover if a soil test ` \ Top 50�: \. � - l ° � z � �
b,� ` \PVC, PIPING AASHTO M-2-75 b" - RIOT) GENTERS, 4 HOLE indicates it is necessar if sod was _� �r'
5GH. 40 PERROWF used,check to see that it was not Y�yo �- Q .4' ELEV.: 981.0 RETA ING Q 1}�1� 24 Z
grownP CRATE ��8>I ~ , �`� 6" P H W L ] ��Lu -- t- o
on clay or impermeable � t �
soiLs. Replace sod if necessary. {p _ Q �� r ■
Tree stakes/wires are present Remove tree stake/wires(which \ I ICI /8.4U O- 1 �A/ O Q
8 �J z
six months after lanting. can kill the tree if not removed). C0 O }
The bioretention cell: Mulch is breaking down or Spot mulch if there are only ` \ Q ` CO d 13 Z Ca _
soils and mulch has floated away. random void areas. Replace whole < " �J � Q CC 1 y � � � �/ O 0
mulch layer if necessary. Remove ` \ \ `� /� �� i l 1 2 Q tl �
LU
the remaining much and replace ` \ a c� \ \ \ R1 64 pVC �wf p�€X � AKOONQ 7(i5 m
with triple shredded hard wood \ \ \ �1\ PROP{ BIO CELL Z
mulch at a maximum depth of \ ° �_ � '
three inches. ° \ _� CIO } G
1 0
Soils and/or mulch are Determine the extent of the J29� /0; I J I Z
clogged with sediment. clogging-remove and replace \ S 7 \ �_ w / �■ LLJ (�
pC/� y,.� either just the top layers or the \ \ 4 \ \ \\ J \ \ \
BI O NTI N M I A REQU I I"IENT entire media as needed.Dispose of _ �' \ �'�_p OPEN
the spoil in an appropriate off-site
-THE MEDIA SHALL BE A HOMOGENEOUS SOIL MIX ENGINEERED MEDIA BLEND location. Use triple shredded hard \` S �- �__ �» SP ACI
WITH APPROXIMATE VOLUMES OF: wood mulch at a maximum depth \ 9 VC \
A) 75 TO 85 PERCENT MEDIUM TO COARSE WASHED SAND(ASTM C33, AASHTO M 6/M80, of three inches.Search for the ` \ ` ` '9 986
ASTM C330, AASHTO M195, OR THE EQUIVALENT): source of the sediment and remedy OV I
the rroblem.if possible. ` \ k:' r _ 4\
B) 8 TO 10 PERCENT FINES (SILT AND CLAY): AND B14lPelement Potential problems: How toremediatethe roblenn: \ ` II \/1 \ \� o t tr
C) 5 TO 10 PERCENT ORGANIC MATTER (SUCH AS PINE BARK FINES), The bioretention cell: An annual soil test shows Dolomitic lime shall be applied as \ ` 7 ` ` \� r { `�r
soils and mulch that H has dropped or recommended per soil test and \� ` nI ` �\ �J V V ` �5lR�<' '
p Pp P- MINIMUM 1" PER HOUR INFILTRATION RATE MUST BE MAINTAINED. ' {continued heavy metals have tnxicsoilsshall be removed, ~ \ � r' � �}� ` ` ��^� ��0.•'�flF G.y�.�fi��
- MEDIA TEST TO BE SUBMITTED TO LOCAL GOVERNING AGENCY FOR STORMWATER accumulated in the soil disposed of properly and replaced ` _ �� \� 1 Lj g� . \ _ e SEAL
AFTER CONSTRUCTION ALONG WITH CERTIFICATION. media. with new plantingmedia. u ;T -
- MEDIA P-INDEX (PHOSPHORUS) SHALL NOT EXCEED 30 IN NSW WATERS AS The underdrain system Clogging has occurred. Wash out the underdrain system. \ \ �\ \ No;r- 149$4 :�=
�\ \ 'y ' •
if applicable)
\ \ `` q }I a
DEFINED IN 15A NCAC 02B .0202 AND SHALL NOT EXCEED 50 ELSEWHERE. / \ S lY _ , ` q \ ���"p •'Fti�1N �e
The drop inlet Clogging has occurred. Clean out the drop inlet. Dispose \
MEDIA SHOULD BE SENT TO NC DEPARTMENT OF AGRICULTURE L,d�6 OR OTHER of the sediment off-site. ` - - Qv� �i
REPUTABLE LAB FOR ANALYSIS OF THE P-INDEX. The dropinlet is damn ed Re air or replace the dropinlet. �\ j+t r ++
\ ++
'The receivingwater Erosion or other signs of Contact the NC Division of Water
- MEDIA SHALL NOT BE PLACED BY MECHANICAL MEANS OR COMPACTED \ �- Ge� _ �\
damage have occurred at the Quality 441 Oversight Unit at 919- \ �� .� /� \ \ �\ \ 10/18/24
MECHANICALLY. IT IS RECOMMENDED TO EITHER WATER IT OR WALK ON IT AS outlet. 733-1786. \ ` •v `
`N 881 ,786 0 \ \� \e
IT IS PLACED. '�
-CONTRACTOR SHALL SUBMIT A CERTIFIED COPY OF A SOILS TEST REPORT � GV � �� T. --_ � �\ E� ��
FOR THE PLANTING SOIL PRIOR TO BIORETENTION AREA CONSTRUCTION Notes: E `I,661 ,954.57 \� a �- 7 E NCDOT C
MEETING THE MINIMUM PLANTING SOIL SPECIFICATION. The engineer's certification of completion will be required prior to the final €at -
g P q P P }> "D D E VGA L \OP 985,25
or certificate of occupancy.The stormwater control is to be inspected to ensure A is LA T 36 I C1 02.6 235 N g
functioning as designed and has full design volume prior to issuance of the any o ? rr -L C \ ! ] \ "'DATE 9U 4.6
certificate➢foccupancy. LONG -80t 42.796E W \ \ \ _
The property owner(or homeowner's association) is responsible for maintaining { �\ l 1 INV
( { �"- C
the stormwater control(s)according to the approved maintenance plan and direction of \ l \ \ \ O,� \� ti I�' Q
the City of Winston-Salem.
4
The City of Winston-Salem and their assigns have right to access the stormwater
control(s)for inspection or maintenance,as necessary. " r ■ 11
\ 1.0' NEGA�E ACCESS E 'T_ W
ADJACENT TO OLD HO �
NorEs.' \- \ � 1 OW FjQAD
BRICK MASONRY CAN BE \ PROPERTY LINES. J 1 r� l� �1 V e l e
COMMON CLA Y BRICK JUMBO
A ORICK, OR CONCRETE BRICK. D O
CONCRETE BOTTOMS SHALL
BE PAID A5 BRICK MASONRY S 1 0-CEL L ,�' '
�IRIP ALL MORTAR JOINTS ARE TO BE 1/2" SCALE 1 20
f 1/8�' �I _ '
CONCRETE COWR W BE PAID 4
FOR UNDER THE PA Y 1 TEM
4x4'PRECAST CONCRETE PROP. YARD INLET K
YARD wLEr COVER. THROAT EL.: 983.50 �
FOR DEPTHS OVER 4=D" USE INV. EL.: 982,00 (1.25' WEIR) Z
ENGINEER'S CERTIFICATION OF STORMWATER QUALITY CONTROL s" PLUG STEPS ON 16" CENTERS
ICERTIFYTHAT,PURSUANTTOGENERALLYACCEPTEDENGINEERINGSTANDARDS O STEPS SHALL BE IN ACCORD- PROP' INV. EL.: 982.50 (1.O' WEER) BERMUDA GRASS SOD. , tL
FIRST
STINCHOFRAHE COMMUNITY,ITISMY PROFESSIONAL pP REQUIREDTION THAT OFF BECO OM TROLL I ANCEGEN WITH LOCAL GOVERNING RETAINING INV. EL.: 978.80 (9) 15" SOD MUST BE GROWN ON Know What s below.
6"x 5"--- tV °�- AGENCIES: WALL �+
FIRST INCH OF RAINFALL FROMAR£ASTHATAREREQi11REDTOBEGONTROLLED TEE INV. EL.; 976.90 A PERMEABLE LAYER (SAND) La�� before you dig.
BY A PERMANENT ENGINEERED STORMWATER QUALITY CONTROL THAT HAS BEEN V
DESIGNED TO MEET OR EXCEED THE REQUIREMENTS IN THE TOWN OF WALKERTOWN - FOR PRECAST cONCRETE MODELS OF TLlls � SURFI�GE ARE► PROVIDED: 3r4� S.F. ! O
UNIFIED DEVELOPMENT ORDINANCE WATERSHED PROTECTION,ARTICLE III. B B STRUCTURE 7-HE MANUFACTURER SHALL PROP. GRADE TRANSITION
STAMP OR STENCIL ITS LOGO OR NAME RETAINING
ON THE A OU INSIDE TSIDE OF THE STRUCTURE.
PVC A DEDUCTIONS FOR ONE PIPE _---- _ WALL q
PIPE SIZE C. FLOW ---� - -i =TTI= RIP-RAP v�
M R. "'-3 t N �� _ FOREBAY o� FLOW ENTRANCE �
12" 0.020 0.032 __---� I t -
PIPE
4=o` �- �L�w #7 3:1 �F�" POINT
15" a.o31 0.04� ' TOP OF BERM ELEV.: 984.00
PLAN 18" 0.044 o.as
10-YR STORM ELEV.: 982.99 15"Rcp PIPE# ul
8
. 2-YR STORM ELEV.: 982.40 g°Pvc
w
r , --- --- _ _ _ _ TOP OF SOD ELEV. 981.00 --
1-YR STORM ELEV: 9$2.18 - - - - -
a I -CELL CONS GTI CONCRETE CO2R $"x B"BRICK PIER coNCR�re CouER e�x e"BR�c NON-PERFORATED PIPING TO
= IRS ON 5Ec�UENcE; K PIER . _:(Mltt j.. :'::':--':' :':: ::. : :_'..:::: -: ::'.--:.
AT EACH CORNER rwo AT EACH CORNER Two SURFACE WITH CLEANOUTS TYP COURSES HIGH COURSES HIGH GEOTEXTILE FABRIC :-: -:-:P{_ANTING:: ::: :::': ::':::':: :': :- ( ) [n
1. PRE-CONSTRUCTION MEETING WITH EROSION CONTROL INSPECTOR TO GET GRADING PERMIT : , - -------- --
N a a .. 1.0 PONDING STORAGE AREA :: :_ ::::::: :':
RIP-RAP FOREBAY
Q . _.. _
NfILLHAVEALREADYTAKENPLACE. o °^ ° INV. 1�J{' RCP 978.80
N 2. THE SITE WILL HAVE BEEN CLEARED AND GRADED WITH EROSION CONTROL DEVICES IN PLACE - n - _ - - -
ACCORDINGTO THE APPROVED ER05I0NCONTROLPLAN. ONE (1) SIDE ONLY ONL (1) SIDE ONLY CLASS I RIP-RAP - - TOP OF SAND 97$,50
3. ALL AREAS OUTSIDE OF THE NEW BUILDINGPADSPRIVATEDRIVECONSTRUCTnNSHOULDHAVE OPENING (1) 1.25' OPENING AT 982.00 OPENING (1) 1.4' OPENING AT 982.50 BOTTTOM ELEV. AT SHALLOWEST DRAIN POINT: 977.42
BOTTOM OF SAND 978.17
'o THROAT ELEV.: 983:50 THROAT L7 EV.: 983.50
r BEEN SEEDED ONCE FINISHED GRADE HAS BEEN ESTABLISHED.
4. THtRMONONTROLMEASURESINIPLA ET THE BI0CELL SHOULD BEINPLACEWfTHABSOCWTED WEIR ELEV.: 982.00 8" = WEIR ELEV.. 962.50 1 O gu 4" WASHED SAND BOTTOM ELEV AT DEEPEST DRAIN POINT 976.72
U 5. NEW CURB&GUTTER,STONE AND PAVEMENT SHOULD BEINPLACE. „� WEIR
i� -� �WEIR� FLAN GRAVEL BLANKET BOTTOM SLOPE: 0.5% SEASONAL HIGH WATER TABLE (SHWTj BELOW 973.50
1:118. ONCE AL PRIVATE DRIVES ARE COMPLETE,TEMPORARY DNERSION DITCHES CAN BE REMOVED -I - -_ li WEIR I -f I_ I- i - -I I \I _ (#57 STONE) BI O-CELL I
Q AND FILLED fN,MAKING SURE ANY SEDIMENT IS D{SP05ED OF PROPERLY. TOP 6" PVC ELEV,; 979.50 TOP 6" PVC ELEV.: 979,50 I-
6 PVC SCH. 4D UNDERDRAIN @ 0.5 /o SLOPE
co b 7, CONTRACTOR TO REMOVE-SKIMMER AND POROUS BAFFLES PRIOR TO CLEANING OUT TEMPORARY PROP. I o DETAIL
5" [ 6" RETAINING QR �Lt PLAN
�I SKIMMER BASINISJ MAKING SURE THAT ANY SEDIMENT COLLECTED I5 REMOVED AND DISPOSED OF PROPERLY, PVC I RCP PVC WALL � FILTER FABRIC AND �511 RCP OUTLET PIP E
�I 8. CONTACT CITY OFWINSTONSALEMSTORMWATER MANAGEMENT DIVISION PRIOR TOCONVERTING 5" INV 1 15" RCP KEYSTONE GROUP,ING
.--I TEMPORARYSKIMMFRBASIN(S)INTCPROPOSEDBIO.CELL. rpLpG 978.80 IN 7 _ I� II 3108 ALLIANCE DRIB
_
12 WETLANDS NOTE: SHWT NOTE: (3/8 PERFORATIONS @6 O.C., 4 HOLES PER GREEN55oRo,NC 2-140-1 SCALE: AS NOTED
N R. THE CONVERTED SKIMMER BASIN TO BIO-CELL SURFACE AREA AND VOLUME SHALL BE VERIFIED g"p� 6"x 5° � � - 6"x 6" � 6„ ip I CONTACT: SGOtt W[7fIpG0
0 PRORTOCOTO ENSURE CONTINUATION)
ERSMATCH DESIGN CRrrERIA.(CERTIFYING ENGINEER TOVERIFY INVERT ELEV.. 976.90 INVERT ELEV:: 976.90 IEE PLUG _� FLOW I BIO-CELL THERE ARE NO WETLANDS ON THIS SEASONAL HIGH WATER TABLE REPORT ROW) MIN. OF 4 ROWS OF PERFORATION.
PRfORTOCONTINUATION) CLASS I RIP-RAP PHONE-. (33(7}b=G-011l
�l a .._ ° e.4` PROVIDED BY ET ENGINEERING,P.A.,
a - SITE ACCORDING TO MICHAEL BRAME LLJ
10 INSTALLUNDERDRAENS,CLEANOUTS,FILTERSTONEANDSPECIALSOILMIXTUREA5INOICATED - = °4 - °' '' - = ° : 4v�1'_ A'-- = .a ' JOHN M. RILEY,PE-PRESIDENT FAA (33b)36q-133(a DATE:
-L NOTES. a-mall: swallace® oke 5toneL0M
n ON THEAPPROVEDPLANS. CLASS B CONCI7E7E CLASS B CONCRETE WITH PILOT ENVIRONMENTAL, INC. g y
LL 11, INSTALL STONE DIAPHRAGM,SO➢FILTER STRIP AND SEED REMAINING AREAS AROUND THE BIO CELL. 2.500 PSI SECTION _A 2500 PS! , \ - MINIMUM 3� OF # 57 STONE CLEAN
co12. INSTALL PLANTINGS AND MULCH ACCORDING TO THE APPROVED PLAN. SEt✓TIQN B-B 1 I / / _ }�R� � GT° I���-22
THAT 12" A PRE-CONSTRUCTION MEETING SHALL BE OVER PIPES, NOT NECESSARY UNDERNEATH PIPES. GPTENGINEERING d SURVEYING,ING.
13. INSPECT AND MAINTAIN
TONALLE EROSION
al4TROAME MEASURES
SFOR SCHEDULED ON-SITE WITH CONTRACTOR, - CLEAN-OUT PIPES TO BE SCH. 4D PVC WITH GLUED 4400 TTNIN65TREET DRAV�IN BY: MV
0 14. iNSPECTANDMAINTAINALLEROSIONCONTROLMEA5URE5FORTHED RATION OF CONSTRUCTION. MODIFIED 41 �/ 4t SECTION NIGH POINT,NC 27265
N 15. PROVIDE ENGINEER'S CERTIFICATION OFCOMPLE 10NFOR THE BIOCELLTO THE CITY OP MODIFIED I f /� RIP-RAP BAEELE D SAIL ENGINEER AND CITY ENGINEER PRIOR TO ANY CONTACT: GHAFLE5P.TRUBY,JR, PE.,PL,S.
BRIGK MA50NRY YARD INLET CLEAN-OUT FITTINGS WITH SCREW TYPE CAPS. ENE, (356)ai2-aaDOext:3oa
m WIN5TONSALEMSTORMWATEROIVi510NFORFINALAPPROVAL. N.T.S. CONSTRUCTION OF THE BID-RETENTION AREA. - NO FLEXIBLE PIPE ALLOWED. FAX: {3�6}812-8780 SHEET L
N.T.S.
., email: chucl<t®cptertSlneerinc�.ct7m
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