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SEPTIC SYSTEM DESIGN
Z FLOW ESTIMATE:
US i�l _3 BEDROOMS AT 110 GAL / DAY = 330 GAL / DAY
O
FIN D SEPTIC TANK:
LEACH AREA DETAIL 330 GAL / DAY x 2 DAYS = 660 GAL
(LOW PROFILE FLOWDIFFUSORS) USE 1500 GALLON SEPTIC TANK
LN
40 MIL POLY LINER
LOCATION MAP 124' x 3' DEEP
LOT IllCA (1 SF) TOP OF LINER = 103.3
BOTTOM ELEVATION = 1
ASSESSORS MAP:34 PARCEL:29
LAND COURT CASE 14113
CURRENT ZONING: R-25
MINIMUM BUILDING SETBACK REQUIREMENTS:
F:25', S: 15', R:20'
MAXIMUM BUILDING COVERAGE: 25%
EXISTING AND PROPOSED BLD. COVERAGE: 14.5%
102 - --
KEY:
EXISTING CONTOUR: - - - -
PROPOSED CONTOUR:
EXISTING SPOT ELEVATION: 25.5
PROPOSED SPOT ELEVATION: 25.5
TEST HOLE: *
UTILITY POLE: -0--
FENCE LINE:
HYDRANT:.
RETAINING WALL:
M21-36
LEACHING AREA:
USE 4 LOW PROFILE FLOWDIFFUSORS WITH 4' OF STONE AROUND
SIDES AND VAT ENDS 34' x 12' x 6" EFF. DEPTH)
SIDE AREA: (34' + 12') x 2 x 6/12 = 46 SF (0.74) = 34 GAUDAY
BOTTOM AREA: 34' x 12' = 408 SF (0.74) = 302 GAUDAY
CAPACITY = 336 GAUDAY
BENCHMARK AT
SURVEYOR'S NAIL
ELEVATION = 101.83
SEPTIC SYSTEM SECTION
TION
2" PRESSURE LINE TO EXIT THROUGH RISER OR TANK.
A QUICK DISCONNECT IS TO BE PROVIDED FOR
FUTURE ACCESS TO PUMP.
101.92 ITYTEE AT
101.0 1/4" per ft 1 /8" per ft INLET \ja
ELEV. 100.5
ELEV.
1 . 103.16
100.75 100.46 ELEV. ELEV.
a ELEV. ELEV. D-BOX
96.25 1500 GAL 95.96 1000 GAL (6" OF STONE UNDER)
ELEV. SEPTIC TANK GAS ELEV. PUMP CHAMBER
Z
STING PIPE ((6" OF STONE UNDER OR BAFFLE WITH MYERS SRM-4 PUMP. PUMP ALARM
ELEV.= 10121 MECHANICALLY COMPACTED) ZABEL PACKAGE TO BE INSTALLED IN DWELLING 1/4" DRAIN HOLE
TEE SIZES: FILTER POWERED BY A CIRCUIT SEPARATE FROM CHECK
INLET: 6" UP, 13" DOWN THE PUMP POWER. (DISTANCE BETWEEN VALVE
OUTLET: 6" UP, 14" DOWN ON/OFF SWITCH TO BE 4")
(DISTANCE BETWEEN ON SWITCH
AND ALARM TO BE 12")
TEST HOLE LOGS
LAUNDRY DINING ENGINEER: THOMAS McLELLAN, P.E.
FAMILY AREA = ROOM 0 WITNESS: PHIL RENAUD
BED 0 DATE: 9-22-21
ROOM CL
BATH KITCHEN PERCOLATION RATE: < 2 MINAN
L
sh USGS GROUND WATER ADJUSTMENT:
DECK WELL: MIW-29, ZONE: A, ADJUSTMENT: 2.1'
ADJUSTED GROUND WATER ELEV: 97.3
EXISTING FLOOR PLAN (BLD. COVERAGE = 1108 SF)
REMOVE T OF
EXISTING DWELLING
18
0�
LAYBED
FAMILY AREAL
ROOM
c
ROOM
m
BED
m
ROOM
p
BAH
BATH KITCHEN
r
NEW
BED
61MAIII
ROOM
0-
DECK
18 _
EXISTING & PROPOSED FLOOR PLAN (BLD. COVERAGE = 1487 SF)
BUOYANCY CALCULATION: 1500 GALLON SEPTIC TANK
10.5' x 5.67' x (97.3 - 96.25) x 62.4 LB/CF = 3,901 LB
WEIGHT OF TANK = 11,480 LB
BUOYANCY CALCULATION: 1000 GALLON PUMP CHAMBER
8.5' x 4.83' x (97.3 - 95.96) x 62.4 LB/CF = 4,978 LB
WEIGHT OF TANK = 8,240 LB
NOTE:
DESIGN ENGINEER TO INSPECT AND CERTIFY CONSTRUCTION OF
PROPOSED SEPTIC SYSTEM. CERTIFICATION TO INCLUDE INSPECTION
OF FINAL GRADING SO AS TO PREVENT STORM WATER RUN-OFF TO
FLOW TOWARDS ABUTTING PROPERTIES.
EXISTING GRADE
AT LOT LINE = 101.3
UFiHIIVHUt
SWALE DETAIL
WITHIN
PEASTONE OR FILTER FABRIC
3/4" -1 1/2" DOUBLE
WASHED STONE
INSPECTION PORT
ELEV.= 103.3
3'MAX.
COVER 103.3
(1' MIN)
O
102.8 " . " " 102 3 mrc
ELEV. 1 4 1 ELEV. 9
e 34' x 12' 100.3
4 LOW PROFILE FLOWDIFFUSORS
WITH 4' OF STONE AROUND SIDES 5'
AND VAT ENDS
(34' x 12' x 6" EFF. DEPTH)
ADJUSTED GROUND WATER ELEVATION = 97.3
TH-1 101.7
O/A HORIZON ELEV.
LOAMY SAND
8" 10YR 4/1 101.0
B HORIZON
LOAMY SAND
24" 10YR 5/8 99.7
C HORIZON
MEDIUM SAND
2.5Y 7/4 PERC AT 42'
I
NOTES:
1. VERTICAL DATUM: ASSUMED
2. MUNICAPAL WATER IS AVAILABLE.
3. SCHEDULE 40 - 4" PVC PIPE TO BE USED THROUGHOUT SEPTIC SYSTEM.
4. ALL PRECAST UNITS SUBJECT TO TRAFFIC LOADS TO CONFORM WITH AASHTO H-20 SPECIFICATIONS.
5. PIPE PITCH = 1/4" PER FOOT (UNLESS NOTED OTHERWISE).
6. FIRST 2' OF PIPE OUT OF D-BOX TO BE SET LEVEL.
7. THE SEPTIC SYSTEM HAS NOT BEEN DESIGNED TO ACCOMODATE THE USE OF A GARBAGE DISPOSAL.
8. ALL CONSTRUCTION DETAILS ARE TO BE IN CONFORMANCE WITH THE STATE OF MASS. ENVIRONMENTAL
CODE (TITLE FIVE) AND LOCAL HEALTH REGULATIONS.
9. CONTRACTOR TO VERIFY LOCATIONS OF ALL UTILITIES PRIOR TO CONSTRUCTION.
10. GROUND COVER OVER ALL SEPTIC SYSTEM COMPONENTS NOT TO EXCEED 3' WITHOUT VARIANCE.
11. FIELD SURVEY PROVIDED BY TERRY A. WARNER, P.L.S., HARWICH, MA.
12. THIS PLAN REQUIRES THE REVIEW AND APPROVAL OF ONE OR MORE TOWN DEPARTMENTS AND
IS SUBJECT TO CHANGE UNTIL SUCH TIME. THIS PLAN HAS BEEN PREPARED FOR THE SOLE
PURPOSE OF CONSTRUCTION OF A NEW SEPTIC SYSTEM AND DOES NOT NECESSARILY
REPRESENT A FULL DETAILED PROPERTY SURVEY.
13. EXISTING CESS POOLS ARE TO BE PUMPED AND REMOVED.
14. D-BOX TO BE WATER TESTED TO ENSURE LEVELNESS AND EQUAL FLOW.
15. AN ELECTRIC PERMIT FOR THE PUMP PACKAGE IS TO BE OBTAINED PRIOR TO CONSTRUCTION.
16. SEPTIC TANK AND PUMP CHAMBER ARE TO BE WATER PROOFED BY MANUFACTURER WITH
IPANEX CONCRETE ADDITIVE OR CONSEAL 55. A 6" EZ WRAP IS ALSO REQUIRED FOR BOTH TANKS.
17. ALL UNSUITABLE SOIL, (A & B HORIZON, APPROX. 2' DEEP) WITHIN 5' OF PROPOSED LEACH AREA IS
TO BE REMOVED AND REPLACED WITH CLEAN MEDIUM SAND.
OF
THOIiMM
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PROPOSED FQ/STE.
GRADES NAL
1'
THOMAS J. McLELLAN, P.E.
SITE PLAN
LOCATION:
9 MILLARD RD., S. YARMOUTH, MA
PREPARED FOR:
DON & "THY MORRISON
DATE: 10-21-21 SCALE: V = 20'
REVISED: 11-11-21 (DRAINAGE SWALE DETAIL)
REVISED: 1-5-22 (ZONING REQUIREMENTS)
BASS RIVER ENGINEERING
P.O. BOX 1163, EAST DENNIS, MA 02641
508-364-9048