HomeMy WebLinkAboutEngineer PlanGENERAL NOTES:
A.) NEITHER DRIVEWAYS NOR PARKING AREAS ARE ALLOWED OVER SEPTIC SYSTEM
UNLESS H-20 COMPONENTS ARE USED.
B.) THE DESIGNER WILL NOT BE RESPONSIBLE FOR THE SYSTEM AS DESIGNED UNLESS
CONSTRUCTED AS SHOWN. ANY CHANGES SHALL BE APPROVED IN WRITING.
C.) CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFYING THE LOCATION OF ALL
UNDERGROUND AND OVERHEAD UTILITIES PRIOR TO COMMENCEMENT OF WORK.
CONSTRUCTION NOTES:
1.) ALL CONSTRUCTION SHALL CONFORM TO THE STATE ENVIRONMENTAL CODE,
TITLE 5, AND THE REQUIREMENTS OFTHE LOCAL BOARD OF HEALTH.
2.) SEPTIC TANK(S), GREASE TRAP(S), DOSING CHAMBER(S) AND DISTRIBUTION
BOX(ES) SHALL BE SET ON A LEVELSTABLE BASE WHICH HAS BEEN MECHANICALLY
COMPACTED, OR ON A 6 INCH CRUSHED STONE BASE.
3.) SEPTIC TANK(S) SHALL MEET ASTM STANDARD C1127-93 AND SHALL HAVE AT
LEAST THREE 20" DIAMETER MANHOLES. THE MINIMUM DEPTH FROM THE BOT-
TOM OF THE SEPTIC TANK TO THE FLOW LINE SHALL BE 48".
4.) SCHEDULE 40 PVC INLET AND OUTLET TEES SHALL EXTEND A MINIMUM OF 6"
ABOVE THE FLOW LINE OF THE SEPTICTANKAND SHALL BE INSTALLED ON THE
CENTERLINE OF THE TANK DIRECTLY UNDER THE CLEANOUT MANHOLE.
5.) RAISE COVERS OF THE SEPTIC TANK AND DISTRIBUTION BOX WITH PRECAST
CONCRETE WATER TIGHT RISERS OVER INLET AND OUTLET TEES TO WITHIN 6" OF
FINISH GRADE, OR AS APPROVED BY THE LOCAL BOARD OF HEALTH AGENT.
6.) PIPING SHALL CONSIST OF 4" SCHEDULE 40 PVC OR EQUIVALENT. PIPE
SHALL BE LAID ON A MINIMUM CONTINUOUS GRADE OF NOT LESS THAN 1%.
7.) DISTRIBUTION LINES FOR SOIL ABSORPTION SYSTEM (AS REQUIRED) SHALL BE
4" DIAMETER SCHEDULE 40PVC LAID AT0.005FT/FT. LINE SHALL BE CAPPED AT
END OR AS NOTED.
8.) OUTLET PIPES FROM DISTRIBUTION BOX SHALL REMAIN LEVEL FOR AT LEAST
2' BEFORE PITCHING TO SOILABSORPTION SYSTEM. WATERTEST DISTRIBUTION
BOX TO ENSURE EVEN DISTRIBUTION.
9.) DISTRIBUTION BOX SHALL HAVE A MINIMUM SUMP OF 6" MEASURED BELOW
THE OUTLET INVERT.
10.) BASE AGGREGATE FOR THE LEACHING FACILITY SHALL CONSIST OF 3/4" TO 1-1/2"
DOUBLE WASHED NATIVE STONE FREE OF IRON, FINES AND DUST AND SHALL BE
INSTALLED BELOW THE CROWN OF THE DISTRIBUTION LINE TO THE BOTTOM OF THE
SOIL ABSORPTION SYSTEM. BASE AGGREGATE SHALL BE COVERED WITH A LAYER OF
FILTER FABRIC OR APPROVED EQUIVALENT.
11.) VENT SOIL ABSORPTION SYSTEM WHEN DISTRIBUTION LINES EXCEED 50 FEET;
WHEN LOCATED EITHER IN WHOLE OR IN PART UNDER DRIVEWAYS, PARKING AREAS,
TURNING AREAS OR OTHER IMPERVIOUS MATERIAL; OR WHEN PRESSURE DOSED.
12.) SOIL ABSORPTION SYSTEM SHALL BE COVERED WITH A MINIMUM OF 9"
OF CLEAN MEDIUM SAND (EXCLUDING TOPSOIL).
13.) FINISH GRADE SHALL BE A MAXIMUM OF 36" OVER THE TOP OF ALL SYSTEM
COMPONENTS, INCLUDING THESEPTiCTANK, DISTRIBUTION BOX, DOSING CHAMBER
AND SOIL ABSORPTION SYSTEM. SEPTICTANKSSHALL HAVE AMINIMUM COVER OF9".
14.) FROM THE DATE OF INSTALLATION OF THE SOILABSORPTION SYSTEM UNTIL
RECEIPT OF A CERTIFICATE OF COMPLIANCE, THE PERIMETER OF THE SOIL
ABSORPTION SYSTEM SHALL BE STAKED AND FLAGGED TO PREVENT THE USE OF
SUCH AREA FOR ALL ACTIVITIES THAT MIGHT DAMAGE THE SYSTEM.
SAS DETAIL:
SCALE 1" = 10'
D-Box
SO L TEST LOGS:
TEST HOLE 1: EL=28.7±
DEPTH FROM
SURFACE
(INCHES)
SOIL
HORIZON
SOIL
TEXTURE
(USDA)
SOIL
COLOR
(MUNSELL)
SOIL
MOTTLING
OTHER
0-16
Ap
LOAMY FINE SAND
10YR 212
NONE
16-36
B
LOAMY FINE SAND
10YR 5/6
NONE
36-144
CI
I FINE SAND
lOYR 7/3
1 NONE
TEST HOLE 2: EL--28.7±
DEPTH FROM
SURFACE
(INCHES)
SOIL
HORIZON
SOIL
TEXTURE
(USDA)
SOIL
COLOR
(MUNSELL)
SOIL
MOTTLING
OTHER
0-15
Ap
LOAMY FINE SAND
10YR 2/2
NONE
15-34
B
LOAMY FINE SAND
10YR 5/6
NONE
34-145
CI
FINE SAND
10YR 7/3
NONE
TEST HOLE 3: EL=29.2±
DEPTH FROM
SURFACE
(INCHES)
SOIL
HORIZON
SOIL
TEXTURE
(USDA)
SOIL
COLOR
(MUNSELL)
SOIL
MOTTLING
OTHER
0-18
A
LOAMY FINE SAND
10YR 2/2
NONE
18-38
8
LOAMY FINE SAND
10YR 5/6
NONE
38-125
CI
FINE SAND
10YR 7/3
NONE
TEST HOLE 4: EL=29.2±
SYSTEM DESIGN CALCULATIONS:
SEWAGE DESIGN FLOWi
4 BEDROOM DWELLING @ 110 GPD = 440 GPD
LEACHING CAPACITY REQUIREM
(MAX.)11 =440 GPD REQUIRED
SEPTIC TANK CAPACITY REQUIRED
DAILY FLOW =440GPD @ =880GAL.REQUIRED
SEPTICTANK CAPACITY PROVIDEM
1 GALLON 1 LLOWED)
LEACHING CAPACITY PROVIDEDi
ONE (1) 33.5' X 12.83' X 2.0' LEACHING CHAMBER CAN LEACH:
Vt=[(33.5 X 12.83) + (33.5 X 2.0)2 + (12.83 X 2.0)2) X 0.74 GPD/SF = 455.10 GPD
455 GPD > 440 GPD REQUIRED
NOTE: A GARBAGE DISPOSAL IS NOT PERMITTED WITH THIS DESIGN.
INSTALU
ONE (1)- 1500 GALLON SEPTICTANK
ONE (1)- 3 OUTLET DISTRIBUTION BOX (H-20 RATED)
THREE (3)- 500 GALLON LEACH CHAMBERS WITH 4' OF NATIVE STONE ALL AROUND
PERC 62" 15 min DATE OF TESTING: 09/13/23
PERC @ 62" 15 min PERCOLATION RATE: LESS THAN 5 MIN/INCH IN "C" LAYERS.
WITNESSED BY: MATT FARRELL, EIT, J.M. O'REILLY & ASSOCIATES, INC.
OTHER BARRY LEWIS, AGENT, YARMOUTH HEALTH DEPARTMENT
NO WATER ENCOUNTERED
US OA RA 0 S 0
DEPTH FROM
SURFACE
(INCHES)
SOIL
HORIZON
SOIL
TEXTURE
(USDA)
SOIL
COLOR
(MUNSELL)
SOIL
MOTTLING
0-22
A
LOAMY FINE SAND
10YR
22-40
B
LOAMY FINE SAND
10YR
40-127
CI
FINESAND
10YR
M
m
W N
Chambers
Stone
33.5'
INSPECTION NOTE:
PRIORTO FINAL INSPECTION BY THE ENGINEER, SYSTEM NEEDS TO
BE COMPLETE INCLUDING BUILDUP FOR COVERS.
FLOW PROFILE:
NOT TO SCALE
21" DIAMETER CONCRETE COVERS
RAISED TO WITHIN 6" OF
TOP OF FOUNDATION FINISH GRADE (OR AS NOTED)
(SEE NOTE #5)
EL=33.5
Proposed EL=29.5±
Ln
1.6
10" 14""
3, T 1
4'0"
I GAS BAFFLE -
1500 GALLON
SEPTIC TANK
W
LLcc
W
�z
Q
O
0
z
I
31.8
r-�- -- 31.6
" 3�9
2/2 NONE E A L DING TE OF .74 GPD/ F F R SIZING OF SOIL ABSORPTION SYSTEM.
X 32.0
5/6 NONE
7/3 NONE
/ �,X 31.9
�x3.5
LOT 1 $
31.6 � �sq
AREA = 21,114 SF±e
w
/ G04 / I
31.7 // / s x 3 .7 I RES. I
m
0 31,E / 1 x 30.5 I ' �.-
o � � .� 'mob _�,n..�,��✓�
w
31.5 \ _ _ '� PROPOSED DRIVEWAY f _ I 29.2
30.5 r 11.9,
31.7 31.2 ✓' ~' 12 SA$
^�.� ~ 31.i 3.6'
x 30.4
2.4 ROp 31.2 46.3'
SFD q"y ie 30 do
31.9 RSFRI w.
31.4
O O
1.4 1, x PROPOSED N
31.4 31 __._ x} 31.8 _ m DROOM y-, " 21.4' 1 4 N
W- DWELLING ' x 29.8 TOP OF FOUNDATION TP3
x30.5 1 V EL=33.5 ;
INSTALL A TOTAL OF FOUR (4) 24" DIA
CONCRETE COVERS TO WITHIN 6" OF FINISH
GRADE: TWO FOR SEPTIC TANK, ONE FOR
D-BOX AND ONE FOR THE S.A.S.
26.50 /
-- 29'
DB-3
D-BOX
H-20
2" DROP
EL=29.8±
26.5±
PLAN
SCALE '
THIS AREA IS SERVED
BY TOWN WATER.
BENCHMARK
TOP OF CONCRETE BOUND
EL=30.0± (NAVD 1988 DATUM)
.-Proposed EL= 29.5
36" Proposed
(9" Min- 36" Max)
FILTER FABRIC
3/4"-1-1/2" NATIVE STONE
x 29.7 f / 2�� �in
x
.7 2X0
x 29.6
r
31
r r
Yarmou Ith Department
QV.� Ll
Date
23.75
USE THREE (3) SHOREY PRECAST
500GALLON LEACH CHAMBERS 7.1'±
Longest Run WITH 4' OF NATIVE STONE AROUND
- 16' (END VIEW)
LEACHING CHAMBER - EL=16.6± BOTTOM OFTH4
33.0'x 12.83'x 2.0'
X 28.5
X 29.1
• 29.6
28.7
T
0
O
0
L=i�Ub2D
a
ti JUL 2 3 2024
HEALTH DEPT.
REVISED 4-15-2024: RELOCATED
DWELLING TO THE SOUTH AND EAST,
ADJUSTED GRADING AND SETBACKS.
REVISED 3-27-2024: RELOCATED
DWELLING 15 FEET TO THE EAST,
ADJUSTED GRADING AND SETBACKS.
REVISED 11-27-2023: ADDED AVERAGE
GRADE CALCULATION.
0 20 40 60
SCALE 1"=20'
G:\/WOBS\THE DAVENPORT CO.\9538\DWG\9538 SITE & SDS PLAN.dwg
SOUTH YARMOUTH,
MA
NOT TO SCALE
PLAN BOOK 349 PAGE 32
DEED BOOK PAGE _
ASSESSORS' MAP 80 PARCEL 130
LEGEND
---. -3z
EXISTING CONTOUR
32
PROPOSED CONTOUR
x12.34
EXISTING SPOT GRADE
24x5
PROPOSED SPOT GRADE
-w-
WATER SERVICE LINE
-OH-
OVERHEAD UTILITY SERVICE
-E-
ELECTRIC/COMM. SERVICE LINE
-G-
GAS SERVICE LINE
®
TEST HOLE / BORING LOCATION
ST
SEPTIC TANK
DB
DISTRIBUTION BOX
SAS
SOIL ABSORPTION SYSTEM
Reserve
RESERVED FOR FUTURE
�
UTILITY POLE
®
CATCH BASIN
`L7
FIRE HYDRANT
®
WELL
Q
DRAINAGE MANHOLE
®
CONCRETE BOUND, FOUND
-x-*-
LIMIT OF WORK
-o---d-
FENCE
ti
EDGE OF CLEARING
ZONING CLASSIFICATION
ZONE R40 (RESIDENTIAL)
MINIMUM AREA 40,000 SF
MINIMUM FRONTAGE 150 FEET
ROAD SETBACK 30 FEET
ABUTTER SETBACK 20 FEET
MAXIMUM BUILDING COVERAGE 25%
MAXIMUM BUILDING HEIGHT 30 FEET
PROPOSED BUILDING COVERAGE CALCULATION:
DWELLING AREA 1,474 SF±
DECKS+STEPS+BULKHEAD 198 SF±
TOTAL 1,672 SF±
LOT AREA 21,114
(BUILDING AREA) x100= BUILDING COVERAGE
(LOT AREA)
(1,672 / 21,114) x 100 = 7.9 %± 7.9% < 25.OS6
AVERAGE STREET GRADE:
EXISTING: (31.8 + 31.6 + 31.5) / 3 = 31.6
The Davenport Companies
20 NORTH MAIN STREET, YARMOUTH, MA
SITE & SEWAGE DISPOSAL SYSTEM PLAN
150 NORTH MAIN STREET, YARMOUTH, MA
60 J.M. O'REILLY & ASSOCIATES, INC.
Professional Engineering & Land Surveying Services
1573 Main Street - Route 6A
P.O. Bog 1773
(508)896-6601 Office Brewster, MA 02631 (508)896-6602 Fax
E: SCALE: BY: rECK: [JOB NUMBER:
10-20-23 As Noted JMO/gbMO JMO-9538