20070001 Ver 1_More Info Received_20070410

BRL ENGINEERING
7048 East Slaaley Street
four Oake, NC 27624
{919) 9132908
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Q `~ - OD O 1 Brian R. Leonard, PE, PLS
April 5, 2007
S y$ t ;v, ` ~ y~
~r ~.,..wa ~~ ~ '~ 9 x T, ,
Ms. Annette Lucas ?, °`
Stormwater & Wetlands Coordinator ~,°R 1 d~ ZD~7
NC Division of Water Quality -Central Office
2321 Crabtree Boulevard - Sure 250 ~>~~~~ - Yv~~r~ ~:"A~~r~
Raleigh, NC 27604 ,~:~~i~~~.s Ago sm~p.~~1«j.-~ sRarscn
Re: Stormwater Revisions & Re-submittal of Minor Variance Application For Lot 31 in Carriage
Hills Subdivision, In City of Raleigh - NCDWQ Project # 07-0001
Dear Ms. Lucas:
This revised submittal for the above referenced project is in response to the "Additional Information
Requested" as itemized in Ms. Cyndi Karoly's letter requesting more information dated 2/19/07; and
received by our office on 2/21/07. It is also in response to a telephone conversation that you and I
had a couple of weeks ago. It has taken us some time to conduct the additional field work and
surveying as necessary. Revised documents are attached as stated at the bottom of this letter.
Responses to the list of additional information are listed below according to the stated letter and have
been addressed according to our telephone conversation:
Topographic lines are now shown on the stormwater plan. These topographic lines were
shown in our calculations as initially submitted for delineation of drainage areas. As we
discussed, these lines may clutter the plan somewhat; but you should be able to make out the
general topography. Note that it has been stated on the original plan and this revised plan that
these lines are taken from County topography (2-ft contours). Some field adjustment may be
required to fit site-speafic conditions. Also, to help verify any site-specific conditions, the
surveyor has provided survey data along the grass swale. As expected and as the detail on
our plans show, the cross-section of this swale may require excavation on the high side and
filling on the low side as this ditch runs along the contour of the moderate slope on the lot.
Also, as the contours show, this moderate slope on the lot becomes much more mild at the
level spreader, making the location of the level spreader very conducive to sheet flow velocities
through the buffer. Also note the photographs provided as requested in Item #4 below;
2. As mentioned above and as we discussed over the phone, my drainage area delineation was
provided with topographic lines in the original calculations. If you reference this delineation in
the initial calculations, it should indicate that some area is included from the adjacent culdesac
and most of the runoff from Lot 30 is directed to the back of that lot instead of onto Lot 31. This
was verified by field observation as well;
3. As we discussed it does appear that the 30% impervious was based on percentage of the
entire lot instead of the actual drainage area. Therefore, a revised impervious area of 60% has
been utilized for the drainage area. This did not sign~cantly increase the final discharge
calculation and did not impact any of the grass swale or level spreader design. The revised
hydrology and grass swale hydraulic calculations are provided in this submittal;
4. Photographs of the area around and downstream of the proposed level spreader are provided
in this submittal;

Page 2 of 2
April 2, 2007
Ms. Annette Lucas
5. As we discussed, our application was submitted prior to the adoption of the revised level
spreader design. I do not disagree with your strong recommendation to install the newer level
spreaders. However, these devices are more costly than the earthen spreaders and in the
interest of feasibility, we would prefer to utilize the design criteria that applied for our application
package. I will be glad to discuss this in more detail with you if you would like.
On behalf of the Developer, I would appreciate your review of this additional information. Please
contact me if you have any questions.
Sincerely,
,8-=
BRL ENGINEERING
Brian R. Leonard, PE, PLS
BRU1
Cc: Rob Shank
Attachments: Revised Stomrnrater Plan - 2 Copies (Half-Size Sheets)
Revised Stomrnrater Cak:ulations -1 Copy
Photographs as Requested

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REVT~F,n
DRAINAGE CALCULATIONS
FOR
STORMWATER MANAGEMENT DEVICES (BMP's)
BUFFER VARIANCE FOR
LOT 31 IN CARRIAGE HILLS SUBDIVISION
in
CITY OF RALEIGH, NC
(~ p BRL ENGINEERING
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~' Four oaks, Nc 2~su
Office: (919) 9632608
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Worksheet
Worksheet for Trapezoidal Channel
Project Description
Worksheet Q2 Grass Swale p.EV .E- Gt+r-c k- QL r=~~st S: -.ec rln.%s /s ~L~llt//~ ,-1r ~L p; ~'',1';ov/t ~ S.j„/).
Flow Element Trapezoidal Che rH.Y+ Quo ~
Method Manning's Form
Solve For Channel Depth
Input Data
Mannings Coefiic 0.030 ~-- G~4ss (C. w st~v
Channel Slope 010000 ft/ft s- des %~-, S/o~c .. S ~ to L o 7; - v sad Y`14x ~ (Cr w rl~ r-,
Left Side Slope 3.00 H : V
Right Side Slope 3.00 H : V
Bottom Width 2.00 ft .f- r~r., prs%~+61c B<sG
Discharge 1.03 cfs
Results
Depth 0.24 ft
Flow Area 0.6 ft'
Wetted Perim 3.50 ft
Top Width 3.42 ft
Critical Depth 0.18 ft
Critical Slope 0.025370 ftJtt
Velocty 1.B0 ft/s i-- t 2.0 All..~wblc
Velocity Head 0.04 ft
Specific Enerc 0.28 ft
Froude Numf~ 0.65
Flow Type 3ubcritical
.. Gr.ss bk ~ A/o L/•.t..~ lQ.r4v~.t4t, G~GG~ Qio ~iFiaslu~.
Notes: Q2 Grass NO Lining: Best Section (Slope; Base; & Sideslopes} By Trial & Error to Keep Q2 < 2 ft/sec
Project Engineer. Brian Rentz Leonard
c:\...ldesignWitches\106015-01-ditches.fm2 BRL Enginoerfng FlowMaster v7.0 [7.0005]
04/05/07 05:48:28 PM ®Haestad Methods, inc. 37 Brookside Road Waterbury, CT 08708 USA [phone] Page 1 of 1

Worksheet
Worksheet for Trapezoidal Channel
Project Description
Worksheet Q10 Grass Swab Q~V
Flow Element Trapezoidal Cha
Method Manning's Form
SoMe For Channel Depth
Input Data
Mannings Ccefiic 0.030 ~- Get ss f/l.-.svv.~
Channel Slope 010000 ft/ft .~.._ Q~s;1„ s/.~ , .,~~. t• /.07- , vacd MAX
Left Side Slope 3.00 H : V
Right Side Slope 3.00 H : V ~/ ~q L DES/bI~-~ S6G T lo~J Set Ba/o ~-
Bottom Width 2.00 ft
Discharge 1.28 cl's
Results
Depth 0.27 ft
Flow Area 0.7 ft=
Wetted PerirrN 3.69 R
Top Width 3.60 ft
Critical Depth 0.21 ft
Critical Slope 0.024432 Rift
Velocity 1.71 fUs .ra- ~cc 4-S ._ G~a.ss ek, ~t1o L~..~.~ /2,tg.~r•ed
Velocity Head 0.05 ft ~l~ .~.r~61t
Specific Enerc 0.31 ft ,~. G..ss
Froude Numb 0.66
Flow Type 3ubcritical
Notes: Q10 Grass NO Lining: Best Section (Sbpe; Base; 8 Sideslopes) By Trial 8 Error to Keep Q10 < 4.5 R/sec
Glr..IAL.SLOpE
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Project Engineer: Brian Rentz Leonard
c:\...\designWitches\108015-01~kches.tm2 BRL EngineeHng FlowMaster v7.0 [7.0005]
04/05/07 05:48:44 PM ®Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1

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GENERAL NOTES CONSTRUCnoN sPEaFlcAnoNS N
1. THq PLAN IS BENRi SWITTED TO NCOwO FOR APPROVAL 0/ A BUFFER YAPoANCE M OROE11 TO CONSTRUCT BIPERNOUS 1. A 1OPOCRAPHK; SURVEY NAS NOT BEEN PERFOIBLED TO CgIF181 E10S11N0 QRADESi SEE
,p, AREA M1HM ZONE 1 OF TIE NNSE BUFFp4 OEIfRAI NOTE a DEVFS.OPERS Nq/q! CgiTItACTORS SHOULD HAVE TIM STORNWATER N ~ 1 O a O (
"~0 q;NCE3 STNfEO q1T Mq VOtlFIED f0 TIt1R ONN SAiISFACTN7N, SUpIT RFIOCATION OF
CaRRlAGE Z TINS PLAN IS PRIMARILY Fdl APPLN;ABRIiY Oi THE NEUSE BUFFEII RULES AND fOR APPROVAL BY NCOWO. SEE STOAMWATER pEyfOES YAY BE NECESSMY AS LONG AS ZONE 1 OF BUFFER 13 NOT
pWVE BIFORYAlIONAI NOTE RECAAgNO S10RNwA10! NN'gMAAllpl Fql NC0W0. NO IXAWS OR wARRAN11E5 AAE MADE ql IMPUEO gSTURBED AND dSNIRBANCE3 IN ZONE 2 DO NOT BIKEED 111E MAIOIRIY gSiiRB1FD AREAS
REOARDINO OTHER APPROVAL PROCESSES iHAT YAY ALSO BE AEOUNB?D (RICLUONiO APPROVALS OR PERMITS BY iNE qTY OF SNOFM ON THIS PLAN, ~ GRAPHIC SCREW
STS BALLOON). SEE ALSO NfgIMATNINAL MOLE REOAl10R10 S1gBIWATEII Bi0RMA1N1F1 FOR qTY 01 RALEIpI
2 ALL NEM.Y CONSTRUCTED NPLRVIOU! SLWFACp THAT QICROAdI MiHW BIMFER ZONE
J• PROPERTY NR'ORLIATKIN LS TAKEN FRgI A SURVEY PIRPARED BY BYI1D SUAKYINQ PA aF SMITtIFKLD, NC; MIN71 2 SHALL gTAN RINH)FF TO IIIE PROPOSED GRASS SWALES AND OiNER DEVN7R AS SNaATI,
AEFEAENCE9 A PREVNIUS SURVEY RECORDED IN BOgt a YAPS 1BBa WOL J. PAGE 2T2 ANY DEVELOPERS AND/OR BI AOOOROMN:E M1H TINS STOAMWAIER PUN. N[M.Y CONSTRUCTED RIPERNgA9
iERN JY COIITRACTORS SHOULD VEIBFY ALL PROPERTY INFORIIAIION MiH TFK PR0.ECT SURVEYOR• SUAIACES COYP(El[LY OUTSN7E OF BUfFFJRS YAY ALSO GRAIN RUNOFF TO THE PROPOSED (M 1Wef I
GRASS SWALCS; pt O11IIX1MSE SHALL 8E CONSTRUCTED TO MAMITANI OF7USE FLOW
4. A OgIPIETE TOPOGRAPINC SURVEY NAS NOT BEEN PERFORAED ON SITE, ENISTNNT TOPOGRAPHY ('91EET FIOW'1 iHR0Up1 B01H ZONES OF TILE BUFFER, IN ACCORDANCE MTN THE
(CONTOURS/ORADES_[REIEF'J IS APF'R0l7LIATED FROM COUNTY q5 OONIOURS ANO HELD OBSEIYAIN>IL SEE CONSTRUC11011 T NEU RIPARIAN BUFFER RLREa
N SSaPPLETNNi 9~ LOCIEAIETED ouTSDE aF THE Ta}TEAR FLaoDPLNN (REEL ZOOB FEYA Bgpf ~ JTZ007BS00 J). J' ~~S Mq/OR CONiRACTDRS SHAD SATLSFY TFENSELVES REGAAgNO TF~ ~ t°" -` ~' ~~T 3 ~~
SWTABIUTY OF 1FIE 91E TO ACCOMY00ATE A PRgF06ED BUN,DNIO MID FT71l110A1N1N Af1ER ~ ~ E ~..'
~aAaor! /COUNTING FON NWEROU9 FACTORS SUCH AS ENI311N0 TOPOGRAPHY, SOTS, iNE W ~-".
EASEMENTS, ETC. BETMD?I SETBACKS AND PROPOSED STORMWA1E11 DENCES, BUFFERS, ~ ~ ~
a sEE oErul sr~r FDR AoomaNAl sPE(~uTN>Ha ~ A~ ~~ ~ ~ :~~0 f ~ ~ ~ ~
-_____~ ~ I ~ ~ ~ ~ ~ ~ ~ ~ ~ pI 1. ~ ~_~' aa~c ~ ~ ~ ~ ~
I II I V ~ m
INFORMATION FOR NCDWO STORMWATER MANAGEMENT AND APPLICANT MITIGATION ~ ~ ~ - - - .. ~ _ ~ `~~ ~ --- N ~g~~~ ~y, ~ ~ ~ l- ~' Z
THIS STOAIIWAIER PLMI R RECUAm BY NCORO AS PART OF A ANNOA VAAIANdt REQUEST TO CONSTRUCT IMPERVIOUS SURFACES I ~~' ~ ~' >X
SPECIFICALLY RESIDENTIAL HdAES1E5 ON AN E>a51BN7 SUBpNSICN LOT Jt AS SNONiI) W ZONE 2 OF A NEUSE PoVEII IBPAPoAN ~ ~ ~ ~ ~ )~~~ ~ ~ 1 ~ I ~ ~ ~ ~ {il
R. mE REUaNwo Fa+ THE a~auES>EO vMaANCE a LoacAl r~ LOTS MaE RECanoEO P~oR ro THE AooPnaN oF~nIE ~ ~ ~~ ~ / / i l~' ~ ~ ~ ~ J ~ ~ _
PoPARIAN BUF71:R RULES; AND FENCE THE CURRCNT OMNF]F CANNOT REASONABLY O[VELOP OR SALE iHESE LOTS MTHOUT SUCH VARIANCE \ /// / I ~ I I/ Il ~ ~ ^~
THIS REQUEST APPEARS TO MEET THE FlNDBIOS OF FACT AS STALED NI 1SA NCAC 07&02J3 (B), SIMJECT TO 1NE DUtCAE110N OF NCD~ ~ \ / / ( I ' II ~7/ I / I
THIS STORIIwA117t PLMF AS PROP09E0 ATIENPIS 10 CONFORM M1H RE dRd1ENT RIPARIAN BUFFER AULE9 (Rff~ 1SA NCAC 07&07JJ)1T0 \ W ~a
THE GAEAIEST EX1191T P0698LE, gVEN THE IANAC1Ti ASSOdA1FD MiN 111E VAPoANCE REQUEST• THE DEBgi Of THIS PLMI IS INi[NDED TO / 6
YSMBZE ALL STONMWAIER B1PACiS OUE TD 1NE PROPOSED MiERV10US SURfACE3 M1HIN BUFFER ZONE 2 ACOORDWIO TO GIS Y, \ ~ ~\ ~~ (I I / I I ,~{ / I 'l ~ ~/ ~ / I ~ ~~`
THE 'lAY Cf 1fE LANG' OFFEFS AN q'POR11M11TY TO DBECT ALL RUNOFF (FRgI 1NE RIPERNOU9 9LIAFACp Mi 111E BUFFR BACK OU `\I \ I ~ ,~ / q ~ I ~
OF THE BUFFER tDNES AND PANE rc gFFUSE PPoOR lD RE-ENIENING iME SUFFER BY OgNG 1ti15, 1NE DESIGN M EssEN~r~ I I ,a I I ~ I I I / /I ~ I m
AS E TILE BAPtAN0U5 SURFACES M71E NEVER IN iFIE BUFFER, FOR ENAMPLE, IIPERYIOUS SURFACES d1T510E OF iNE BUFFER THAT MAl<E `'1~` 1 ~ ~ I i I
RUNOFF DIFFUSE PRIOR TO liE BUFFER AIE TYPICALLY 'EXELIPI' F1N1M TFE BUFFER RULES AND NOINN;AlION TO NCDWO q NOT NORMALLY ~~ 0TH ^ 2S FT, 1 \ \ yp / / I /
REOUMED. TENS PLMI PROPOSES THE SALE RUNOFF 9CENAAIO AS AN 'ENENPI' ACIINTY, MRCH MEETS I11E GOAL OF YNFMRBIG BIPACI'a \ CONSIR TEO OUT510E OF BUZON 2 ? 1 d
N pL ONALLY, IT MLL UTILIZE AN ENCI11Et7ED GRASS SWAIE AS THE CONVEYANCE OENCE MLN7L MLL OFFiR 80YE tN1ROCEN TREATMENT AS MADY BE SHi OR RO AIED AS TiEEDED I I // I ~ F I I I ~ / /
RUNOFF FROM THE PROPOSED LOTS DRA1I TD CU55'C' WATERa 11115 PITQECT IS NOT LOCAIID IN ONE aF THE 20 COASTAL OOINDES BE MABJTAINED BY OWNER OF L T 3i I I ~ ~ I6ti //~ I I I iI I / / / ~ G
TYPICALLY LBN18 MPERNOUS AREAB AND REOURES ADgTNMI A~iMENSTA~31OR11WA~ RULES ~ : I~~ TO BE 1APPLICABLE. ~5 ~~ I / EASE,uEN ~ 1 I I 1 / ,~wi w~~
10' S W TER EASEMEN - FlNAL ocAn J/ j I I ~ I Qi': • ~ ~~ ti'
A SEPARATE M11CA110N PLAN K A450 AEgINED BY NCDWQ AS PART OF TiNS VARIANCE REQUEST. 1NE ORNER'S WIENTION K lO PAY THE ' I I / ~ / / f ~ ~ I ~ '
AEWRIFD FEE Ni1O THE ECOSY91E11 ENNANCEYENT PROGRAM BASED ql DISTUNBED AREA q ZONE 2 Q 1NE BUFfiDI THE FEE CALdRa1TON CEN ON AS-BUILT STORMWATER ,~Y 111 '{
M DOCUYENIEO q THE COVER LETTER MTN 1NE VARIANCE REglEST SUBWTTAL MID IS SUARIAFBZFD AS FglOwS; (NOT EN ACH INTO ONE 1 OF ~ ) _~ V l / ~ l ~ I ~ I I ~ I
ADDIn AL CE~AO~ENT N Y BE NECESSARY U lO ~ I I I ~ '
TOTAL IMPACT TO ZqE 2 GF BuFTER ^ LBJO S0. FT, (TOTAL FOR LOT J1) STEEP STING' SLOPES ~D ANY BUI ~ NEEDED I~ ~ / ~ ~ ~ ~ / i I ss~i~,,.....::•
E,],S (AI ~TIPLIEA FYIR ZONE 2 PQ 1SA NCAD 02B.D242 (J)(b)) ~ / / ~ / I I // /^I I y^ 8 e~( ~ I 3y/abdllllll ~ M~
~. FT. (PER 15A NCAC 078.0242 (~(a)) AREA~RUNOFF WITHIN UFT'ER; ~T 5TH A S ~ ~ /~j /I I ~ V ,/ /~~ , ~, Q ~ h ~~jj• III / I I J ~g~
AND gRiE T FLOW BA K DUTSID OF Bl-FFER ZONES ' ~~~ ~ ~ ~~~ ~~~ 2 w 51 ON DI N FR , I
INFORMAnON FOR q1Y Of RAIEICH STORMWAIER MANAGEMENT ~ IN b V SPR A ~ - i TAI / ( A SW TO E
y £Y
ACCOItOBIC TO A/CpOEFIVERSAIION MiN dTY ai RAIEIGFI STOAMWA1iDT 9TAff (BEN BRORN ON 10/2/Oe), LOTS THAT ARE LINGER 1/2 ACRE ANO I ~ EwsT F S / S / `i
s~TOAYwA~~aidN1ANCE~cA~RR1~Aa~iRLl~s NSN7N~PA~RndgILAIi~LYRFIMEPR~SOJ~EDEtA1~5 SHO~~MI gi~THls PLAEN~MAr tN~ M~1T / ZONE 2 ^D15950BSOC TN HATCHED)
Ill ,~/// // /I ~/ ~ ~~~~
E)<EYPTiON CPolER1A MID WOULD 1FLEREfORE NOT BE SUBiCT TO THE dTY$ STORYWAIER ORDNANCE. ALTHOUGH STATE BUFFER REQUNiEAN]I1S DO /~ / / / /
STILL APPLY, IT t5 RELEVANT TO STATE HERE THAT ANY ADOI110NAL S10RMWA1IR AEWIREYEFITS IMPOSED BY THE CITY MUST BE AGGRESSED I / / /~ I ~( / / / / / ~ Z ~~
1HF'000H THE g1Y'S PtDIMrc11N0 PROCESa 11 ' I / `
~-. ~
NOTE THAT LIE OFNER OR DEVFlOPER aF 1NE3E PROPOSED LOT'S SHOULD, HOREVER, 8E PREPARED TO OBTAN ALL APPROVALS F110M NCDWQ PAI / \ - ~~
ALERIID)IAND MLL REQUIRE MtI11EN APPAOVq/ NCOWO PRIOR TO THE ISSUANCE q' BUEDBIOdPE AI9iTDRNWAiER DEPMTYENT MLL BE "~ ~ /, I ~ /~~ I I I / / / / / /
~ I / ~ LONG FY101PMN ,~ / / / ~ ~ ~ ~
_ ~~ Fl YA AS dEOUBi N ~ ~~j / / /~, ~ ~~~ s
~ ~ / / ~ \~\~ T T~0 0 IN~AU Z ~ // / / / ~O ~
I USE ROOF I , CU O AI C ~ ~ / / / ~ F ~
QNP l l ~W s B ~S / ~ ~~~
~~t' ( ~ /) // IF/ IS R CT, , RA W ' ~ / ,
BO R ~'A ~F0 1~ l I ~ l l/ I I ~ IMP VIOU A RUN ~ / W Z
~ 'PUBLIC l/ l / / /l / / < <
FINAL DRAWING -FOR ~ -~ /I/// / ~ ~ / l l ~ l l ~~
\ / / ~ ~ ~/~ ~/ / ~j/ / ~ / / aTERATIErArtRwrxwer. 1
RENEW PURPOSES ONLY I / ~ //I // I /~ ~ ~ // //, ~ / BYRB 8URIN~B, PA
FAI[ItIFN01D1 k

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WiGM 6iSIRF1N A7pl AT EMALhC!
QRIOlW1Y A491GM' 70 ZEJPD IMDAI AT A7ND
COMPACTED flLL AS REQUIRED
~3
' ~~ ~~~NNS ~8" MIN
5~~
NOTE; FOR THIS PARTICULAR SITE,
CONSTRUCT SWALE APPROX. PARALLEL
TO EXISTING CONTOURS, OUE TO E7pSTINC
TOPOGRAPHY/SLOPES MID IN ORDER TO
KEEP RUNOFF VELOgTY TO A MINIMUM
PROFILE VEW
CONSTANT SLOP C DEPTH
NORTH AMERICAN GREEN FlNAL GRA55 SEEDING ^ TALL FESCUE OR BERMUDA
SC 250 PERMANENT MAT
OR EQUAL -^~
1 i ~
i ~
i ~i
~ ~ D = 1,0' MIN
Z'
CONSTANT~~ V~G DEPTH
GRASS SWALE DETAIL
NO SCALE
DEP1H VARIES
Hon;• E>asnHa rava~~nrr wa slaaE auawAnaH rAKa ~ 1YAHE CouNtt as, 2 ~. CcNTOUIex
FNUA. 9.OPE5 SHOULD BE IN nIE FlEIL PAIOR To Cg151RUCTIOH.
LEVEL UP Of SPRE4DER
0.5'
LENCIN OF LEVEL SPREADER
PERAL4NEM AS SPEClflED ON PLANS
AN>•ERG9L SIAPLEO EROSION CONTROL BURIED 6
IN PUCE AUrnNC
~~ ACCOW GRASS ~~~ MINIMUM
~ ACIRIN AAIfRM.W
GRfOV S~ ?3G PERMAMENT ANT
SECTION THROUGH LEVEL SPREADER
NO SCALE
O1 - 00 O I
Fh1AL DRAWING -FOR
REVIEW PURPOSES ONl Y
~y~ ~~'I :'; li tier t~;, ~~,
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LL
A
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W
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~~~ ~
s o ~~ ~
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V C
1 ~
~~~~
?~~~
r•$
h
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!MN 11~
2
2
TOP OF
CONSTANT BED SLOPE
MIN SLOPE ^ O.Sx (TO DRAIN)
MAX sLOPE - I.ox (FOR Low +~LOam
TIL4 LOOSEN, k SCARIFY E>OS11N0 SOIL
IMMEDIATELY PRIOR TO SEEgNC IN ORDER
TO PROMOTE INFlI.TRATION (00 NOT COMPACT)
CONSTANT
SLOPE
S = 0.5% MIN
S = 1.0% MAX