HomeMy WebLinkAboutSite & Septic Plan 12.29.2025GENERAL 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
UNDERGROUNDAND OVERHEAD UTILITIES PRIOR TO COMMENCEMENT OF WORK.
CONSTRUCTION NOTES:
1.) ALL CONSTRUCTION SHALL CONFORM TO THE STATE ENVIRONMENTAL CODE,
TITLE 5,AND THE REQUIREMENTS OF THE LOCAL BOARD OF HEALTH.
2.) SEPTICTANK(S), GREASE TRAP(S), DOSING CHAMBER(S) AND DISTRIBUTION
BOX(ES) SHALL BE SET ON A LEVEL STABLE BASE WHICH HAS BEEN MECHANICALLY
COMPACTED, OR ON A 6 INCH CRUSHED STONE BASE.
3.) SEPTICTANK(S) SHALL MEET ASTM STANDARD C1127-93 AND SHALL HAVE AT
LEASTTHREE 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 SEPTIC TANK AND 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 40 PVC LAID AT 0.005 FT/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 SOIL ABSORPTION SYSTEM. WATER TEST DISTRIBUTION
BOXTO 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 SOILABSORPTION 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.) SOILABSORPTION 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 THE SEPTIC TANK, DISTRIBUTION BOX, DOSING CHAMBER
AND SOIL ABSORPTION SYSTEM. SEPTIC TANKS SHALL HAVE A MINIMUM COVER OF 9".
14.) FROM THE DATE OF INSTALLATION OF THE SOIL ABSORPTION 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 ALLACTIVITIES THAT MIGHT DAMAGE THE SYSTEM.
15.) SUBSURFACE COMPONENTS OF A SYSTEM SHALL NOT BE BACKFILLED OR
OTHERWISE CONCEALED FROM VIEW UNTIL A FINAL INSPECTION HAS BEEN
CONDUCTED BYTHE APPROVING AUTHORITY AND PERMISSION HAS BEEN GRANTED
BYTHE APPROVING AUTHORITY TO BACKFILL THE SYSTEM. THE DESIGNER SHALL
INSPECTTHE CONSTRUCTION AFTER THE INITIAL EXCAVATION, PRIOR TO BACKFILLING,
AND DURING BACKFILLING. IN ADDITION, THE FINAL INSPECTION OF THE SYSTEM
SHALL BE CONDUCTED BY THE APPROVING AUTHORITY, THE SYSTEM INSTALLER AND
DESIGNER PRIOR TO THE ISSUANCE OF A CERTIFICATE OF COMPLIANCE PURSUANT TO
310 CMR 15.021(3). ANY COMPONENT OF THE SYSTEM WHICH HAS BEEN COVERED
WITHOUTSUCH PERMISSION SHALL BE UNCOVERED UPON REQUEST OF THE
APPROVING AUTHORITY OR THE DEPARTMENT.
16.) INSTALLER SHALL VERIFY INVERT ELEVATIONS PRIOR TO SETTING ANY OF THE
PROPOSED SEPTIC SYSTEM COMPONENTS. DUE TO THE CRAWL SPACE WITHIN THE
BUILDING, THE DESIGN ENGINEER RECOMMENDS A WATER TEST OF THE WASTE PIPE
TO CONFIRM ALL WASTE IS CONNECTED TO THE NEW SEWAGE SYSTEM. DESIGN
ENGINEER SHALL BE NOTIFIED OF ANY ADDITIONAL PLUMBING LINES.
17.) EXISTING CESSPOOL TO BE PUMPED DRY, FILLED WITH CLEAN SAND, AND
ABANDONED IN PLACE.
18.)THE EXISTING WATER LINE SHALL BE REPLACED WITH A NEW WATER SERVICE.
NEW WATER SERVICE SHALL BE INSTALLED IN ACCORDANCE WITH THE TOWN OF
YARMOUTH WATER DEPARTMENT REGULATIONS.
19.) INSTALLER TO CONFIRM LOCATION OF ALL UNDERGROUND AND OVERHEAD
UTILITIES PRIOR TO START OF CONSTRUCTION.
20.)THE 4" PVC CLEANOUT SHALL BE WITHIN 3" OF FINISH GRADE. CLEANOUT SHALL
BE MARKED WITH A PIECE OF #5 REBAR FOR FUTURE LOCATION.
CONSERVATION NOTES:
1.) LIMIT OF WORK SHALL BE AS SHOWN. A ROW OF STAKED WATTLES SHALL
BE CONSTRUCTED ALONG THE LIMIT OF WORK LINE PRIOR TO THE COMMENCEMENT OF
OF ANY WORK.
2.) ALL DISTURBED AREAS RAKED SMOOTH, LOAMED AND SEEDED WITH A DROUGHT TOLERANT
GRASS SEED MIXTURE. SEED MIXTURE SHALL BE APPROVED BY THE COMMISISON'S AGENT.
FLOW PROFILE:
NOT TO SCALE
TOP OF FOUNDATION
EL=19.0±
`:•'.'•: CLEAN -OUT
EXISTING
48' -�
21" DIAMETER CONCRETE COVERS
RAISED TO WITHIN 6" OF
FINISH GRADE (OR AS NOTED)
(SEE NOTE #5)
f Proposed EL=19.Oi
10" 14"
3„ T T
4'0"
GAS BAFFLE -
1500 GALLON
SEPTIC TANK
SOIL TEST LOGS:
TEST HOLE 1: EL=20.3±
DEPTH FROM
SURFACE
(INCHES)
SOIL
HORIZON
SOIL
TEXTURE
(USDA)
SOIL
COLOR
(MUNSELL)
SOIL
MOTTLING
OTHER
0-13
E
LOAMY FINE SAND
10YR 5 2
NONE
13-37
B
LOAMY FINE SAND
10YR 6 6
NONE
37-132
C1
FINE SAND
10YR 7 6
NONE
LOOSE
TFST HOI F 7: EL=21.0±
DEPTH FROM
SURFACE
(INCHES)
SOIL
HORIZON
SOIL
TEXTURE
(USDA)
SOIL
COLOR
(MUNSELL)
SOIL
MOTTLING
OTHER
0-12
E
LOAMY FINE SAND
10YR 5 2
NONE
12-32
B
LOAMY FINE SAND
10YR 6 6
NONE
32-140
C1
FINE SAND
10YR 7 6
NONE
LOOSE- PERC AT 50"
< 2 MIN INCH RATE
DATE OF TESTING: 12-16-2025
PERCOLATION RATE: LESS THAN 2 MIN/INCH IN C1 LAYER.
WITNESSED BY: M. FARRELL, EIT, J.M. O'REILLY & ASSOCIATES, INC.
B. LEWIS, AGENT, YARMOUTH HEALTH DEPARTMENT
NO WATER ENCOUNTERED
USE A LOADING RATE OF 0.74 GPD/SF FOR SIZING OF SOIL ABSORPTION SYSTEM.
INDEX WELL INFORMATION:
PARCEL IS WITHIN ZONE A FOR MONITOR WELL M.I.W.- 29
ESTIMATED RISE FOR DECEMBER IS 2.2 FEET
USING THE POND FOR GROUNDWATER ELEVATION (7.3±)
THE ESTIMATED SEASONAL HIGH GROUNDWATER IS EL=9.5
PROPOSED ACCESS COVERS
A TOTAL OF FIVE (5) COVERS ARE TO BE
BUILTTO WITHIN 6-INCHES OF FINSH
GRADE, 2 ON SEPTIC TANK, 1 ON D-BOX
AND 1 ON SAS.
ONE(1) 21" DIA BUILDUP
AND COVER TO WITHIN 6" OF
FINISH GRADE
SYSTEM DESIGN CALCULATIONS:
SEWAGE DESIGN FLOWi
3 BEDROOM DWELLING @ 110 GPD = 330 GPD
LEACHING CAPACITY REQUIREM
3 BEDROOMS (MAX.) @ 110 GPD = 330 GPD REQUIRED
SEPTIC TANK CAPACITY REQUIREM
DAILY FLOW = 330 GPD @ 200% = 660 GAL. REQUIRED
SEPTIC TANK CAPACITY PROVIDEM
1500 GALLON SEPTIC TANK (MIN. ALLOWED)
LEACHING CAPACITY PROVIDEDi
ONE (1) 33.0' X 11.00' X 1.0' LEACHING CHAMBER CAN LEACH:
Vt=[(33.0 X 11.00) + (33.0 X 1.0)2 + (11.00 X 1.0)2] X 0.74 GPD/SF = 333 GPD
Vt=333 GPD> 330 GPD REQUIRED
INSTALLi
ONE 1 -1500 GALLON SEPTIC TANK (USE SHOREY PRECAST ST15MH OR APPROVED EQUAL)
ONE (1)- 6 OUTLET DISTRIBUTION BOX (H-20 RATED)
FOUR (4)- 125 GALLON LEACH CHAMBERS WITH 4' OF STONE ALL AROUND- SEE DETAIL
NOTE: A GARBAGE DISPOSAL IS NOT PERMITTED WITH THIS DESIGN.
DB (H-20 RATED)
`r STONE
r, m 125 GAL
-' CHAMBER
SAS
4' 6.08' 6.08' 1' 6.08' 6.08' 4'
33.33'
SAS DETAIL
INSPECTION NOTE:
PRIORTO FINAL INSPECTION BY THE ENGINEER, SYSTEM NEEDS TO
BE COMPLETE INCLUDING BUILDUP FOR COVERS.
SCALE: 1" = 10'
Proposed EL=19.5± Proposed EL=19.8±
36" Proposed
18.1±
S
16.8± (9" Min- 36" Max)
" FILTER FABRIC
16.75 16.00 j 3/4"- 1-1/2" NATIVE STONE
16.50__7 16.33
2" DROP SAS ELEVATIONS ARE CRITICAL, DESIGN
15.00 ENGINEER SHALL BE NOTIFIED IF
ELEVATIONS ADJUSTMENTS ARE NEEDED
USE FOUR (4) SHOREY PRECAST DURING INSTALLATION.
125 GALLON LEACH CHAMBERS 5.5'±
Longest Run WITH 4' OF NATIVE STONE AROUND
�- 16' 21' (END VIEW)
DB-6 LEACHING CHAMBER �- EL=9.5±SEASONAL HIGH GROUNDWATER
D-BOX 32.32'x 11.0'x 1.0' 2�
H-20 �- SZ - EL=7.3± WATER LEVEL WITHIN POND (11-26-25)
/ 22.8 /
Q �Q PROPOSED GAS SERVICE-� y `
\ ' x19.�
c
�Nz qj \ G\ 22.8
0- LOT 3A Total Area=39,652 SF±
Upland = 39,444 SF±
X
O Per Record Plan x 22.4 g / 1� 11,2 7.2
WG
19 7 . Paved Driveway 18.9
/ Existing Water Service Line J
TO BE REPLACED WITH A NEW
22.5 22,s SERVICE c : / / , 1�.3 / r
is.s I s
2- 16" OAKS '� \ iix
c\
Skl 9 G a x 11.7e
w\ w\ f c 18,E. ; /ab E -9. o e v` s•1
� �CO
1-y
9.1
�.
BENCHMARK #11
Garage Concrete Slab at Door
h - EL=19.0± (NAVD88 Datum)
-1\ x lr 6 '
7 ^yy - 20,0 EXlsfing
gedroom -
ry x 21.4 w TP I � K \ kk �Jc 3 D>NO\0 DN
22,oN w � °�"' 'Rhoda \ = 18.3 E` 1 i�
w I TP1 OL rll
x 22.3 I I --\�® a- 11 V)
\ S �' a N
_ 20, �A x/is•1 46.4'+ Exisng�p+tl�ne� H
DB PRUPD 7 H
E2p 2
/ ao SEE
No
) ro 0
Ms:
J
Its �_
coPROPOSED LIMIT OF WORK LINE 20 - F`n 112.91± 1$
TO BE A ROW OF STAKED WATTLES. x 1
WATTLES SHALL BE INSTALLED PRIOR TO ANY x�x� r�\� O -
WORK BEING STARTED FOR THE PROPOSED x �`S�X i .2 1-'.1
20.9 \ SEWAGE SYSTEM OR PROPOSED UTILITIES. e x -
Existing Cesspool �+ r
I TO REMAIN AND BE CONNECTED TO THE ROOF FOR xisting Stump
X 21,e STORMWATER RUNOFF.
CONNECTIONS SHALL BE MADE BY GUTTERS AND
' DOWNSPOUTS. PIPING TO BE 6-INCH 0 IA. ADS PIPING 2- 14" OAKS ��+I x' 14.4 '
20.2 N X Existing Cesspool,
/ G SEE NOTE 17
I `'o +i
Cq
.11 °H I
ON 7.7
x 21.6 Ln
Utility Pole °" OH Off
246-24 �H °H
19.4 0-1
�pH
°H
" BENCHMARK #21 zo - OH off OH 245.00'
X Utility
21.3 OH
Top of Concrete Bound Y Pole OH OH OH x 1s.3
� - r�I
EL=20.7± (NAVD88 Datum) 6-P _ x 22.6 gg - x 16. 11V
--tility Po9e log�,j 1J
do 246-R24 - ti� y� / 'T2's -lull
ti� 8.9
� v � v
0
O p N
Ln
0 20 40 60
SCALE 1"=20'
w
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6
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