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HomeMy WebLinkAboutSite & septic design plan (stamped) 9-14-202362 50' BUFFER 50' BU F F E R 50' BU F F E R 50' BU F F E R 50' B U F F E R 50' BUFF E R 50' BUFFER100' BUFFER 100' B U F F E R 100' B U F F E R 100' B U F F E R 100' B U F F E R 100' BUFFER BVW #4 CB FOUNDBVW #3 BVW #2 BVW #1 W W W W W W W W W W W W W W W W W E E E E E E E E E E E E E E EEEEEEE E E G G G G G G G G G G G G G G GGGGGG G G S 11° 55' 23" E283.83' N 84° 36' 37" W 552.11' R=52.50' L=37.50'S 84° 36' 37" E 225.45'N 19° 14' 23" E284.00'HYDRANT R o u n d P o n d (A Gr e a t P o n d ) BENCHMARK SURVEY CONTROL SPIKE#3 ELEVATION = 61.52' NAVD88 LAND U N D E R W A T E R B O D Y LOT 19 LOT 20 PARCEL 124-5 OLD F AL M O UT H R O A D (60' WID E - P U BLI C) LOT 3 LOT 4 76,200 ± S.F. (UPLAND) LOT 5 50' BUFFER ZONE100' BUFFER ZONEOBSERVED HIGH WATER MARK (10/2016) L I B ER T Y L AN E ( 5 0 ' W I D E - PU B L IC )USMAIL BOX USMAIL BOX EDG E O F P A V EM EN T 42 44 46 48 50 52 54 56 58 54 56 58 60 62 6058565452 50 545644 46 48 5 0 5242 SSSPROPOSE D DWELLIN G FF. EL.= 6 1 . 5 PROPOSE D GARAGE SLAB = 60 . 0 80.0' 112'21'226'EDGE OF POND IS TOP OF DEP INLAND BANK PROPOSE D WOOD DE C K LEACH SYSTEM 33.5' x 12.8' 1,500 GALLON SEPTIC TANK59.9x 59.9x 59.5x PROPOSED GRAVEL DRIVEWAYPROPOSED GRAVEL DRIVEWAY 60 5456 54 62 x59.5 PROPOSED CONC. APRON PROPOSED WATER SERVICE LOW LOW LOW LOW LOW LOW LOWLOWLOWLOWLOWLOWLOWLOWLOWLOWLOWPROPOSED LIMIT OF WORK x52.3 52.833.5'12.8'58 x52.6 TP#3&4 58 565459.5x COVERE D PORCH PROPOSED WALKWAY 40'20'RESERVE AREA 33.5' x 12.8' 15'53.5169'x52.6 52.6x90' NATURAL BUFFER90' NATURAL BUFFER50' NAT U R A L B U F F E R 50' NAT U R A L B U F F E R PROPOSED LIMIT OF WORK 44'PROPOSED UTILITY SERVICES (WATER, GAS, ELECTRIC & TELECOM) TO BE COORDINATED WITH UTILITY COMPANIES AREA TO REMAIN NATURALLY VEGETATED EDGE OF BORDERING VEGETATED WETLAND INLAND BANK, EL. 41.8' PROPOSED DRYWELL SEE DETAIL (TYP. OF 4)26'39'FZ FZ FZ FZ FZ FZ FZ FZ FZ FZ FE M A F L O O D Z O N E X ( 0 . 5 % ) ZO N E X FEMA FLOOD ZONE X (0.5%) ZONE X EXTENT OF NATURAL HERITAGE & ENDANGERED SPECIES PROGRAM PRIORITY HABITAT TP#1&2 52 52.1 59.0 34'77' FROM PORCH74' FROM STAIRS95' 52.6 52.4 52.2 PROPOSED LIMIT OF WORK133' FROM DECK TO BVW123' FROM STAIRS TO BVWBENCHMARK ADDITIONAL BENCHMARK TO BE PROVIDED FOR CONSTRICTION AT ELEVATION = 59.50' NAVD88 N N NAD 83SEPTIC SYSTEM NOTES 1.ALL CONSTRUCTION AND MATERIALS SHALL CONFORM TO THE STATE ENVIRONMENTAL CODE, TITLE 5 (310 CMR 15.00), AND THE LOCAL BOARD OF HEALTH. 2.THERE SHALL BE NO CHANGES MADE IN THIS PLAN WITHOUT THE WRITTEN PERMISSION OF THE ENGINEER AND LOCAL BOARD OF HEALTH. 3.ALL ERRORS, OMISSIONS, AND CHANGE OF CONDITIONS AT THE SITE SHALL BE BROUGHT TO THE ATTENTION OF THE ENGINEER PRIOR TO PERFORMING THE RELATED WORK. 4.ALL DISTURBED AREAS ARE TO BE LOAMED, SEEDED AND MAINTAINED TO PREVENT EROSION. 5.FOR PROPER PERFORMANCE, SEPTIC TANK SHOULD BE INSPECTED AT LEAST ONCE A YEAR AND WHEN THE TOTAL DEPTH OF SCUM AND SOLIDS EXCEEDS 1/3 THE LIQUID DEPTH OF THE TANK, THE TANK SHOULD BE PUMPED. 6.THIS SYSTEM HAS BEEN DESIGNED FROM DATA REVIEWED AND ACKNOWLEDGED BY THE MASS. D.E.P. AND THE LOCAL BOARD OF HEALTH; AND CONFORMS WITH THE REQUIREMENTS OF THE STATE ENVIRONMENTAL CODE, TITLE 5. NO GUARANTEE OF PERFORMANCE IS EXPRESSED OR IMPLIED. 7.TEST HOLE INFORMATION SHOWN HEREON IS LIMITED TO SOIL CONDITIONS FOUND AT THAT PARTICULAR TEST HOLE LOCATIONS AND IS NOT CONSIDERED AN IMPLIED OR EXPRESSED WARRANTY OF SOIL CONDITIONS BEYOND LIMITS OF SUCH TEST HOLES. 8.ALL ORGANIC AND UNSUITABLE MATERIAL MUST BE REMOVED FROM THE AREA DIRECTLY UNDER AND 5 FEET BEYOND THE PROPOSED LEACHING FACILITY. THIS AREA MUST BE BACKFILLED TO THE ELEVATIONS INDICATED ON THESE PLANS WITH SELECT ON-SITE OR IMPORTED SOIL MATERIAL, CONSISTING OF CLEAN GRANULAR SAND OR OTHER GRANULAR MATERIAL, FREE FROM ORGANIC MATTER AND OTHER DELETERIOUS SUBSTANCES. MIXTURES AND LAYERS SHALL NOT BE USED. THE FILL MATERIAL SHALL CONFORM TO THE STATE ENVIRONMENTAL CODE, TITLE 5 - 310 CMR SECTION 15.255 (3) AND SHALL HAVE PERCOLATION RATE OF BETWEEN TWO AND FIVE MINUTES PER INCH, BEFORE AND AFTER PLACEMENT. 9.ALL STONE MUST BE DOUBLE WASHED AND FREE FROM FINES AND ANY ORGANIC MATERIAL AND MUST HAVE LESS THAN 0.2 PERCENT MATERIAL FINER THAN A NUMBER 200 SIEVE. 10.THE DESIGNER HAS NOT BEEN RETAINED BY THE CLIENT TO CONSTRUCT OR SUPERVISE THE CONSTRUCTION OF THE SYSTEM. THE CONTRACTOR IS RESPONSIBLE FOR MAKING ARRANGEMENTS FOR INSPECTION OF INSTALLATION OF THE SYSTEM WITH THE LOCAL BOARD OF HEALTH. 11.THE GENERAL CONTRACTOR IS RESPONSIBLE FOR ALL HORIZONTAL AND VERTICAL CONTROL OF ALL SYSTEM COMPONENTS. 12.TIGHT JOINT PIPING MATERIAL TO CONSIST OF POLYVINYL CHLORIDE (P.V.C.) SCHEDULE 40, UNLESS OTHERWISE NOTED. 13.THE CONTRACTOR SHALL NOTIFY THE DESIGN ENGINEER FOR CONSTRUCTION INSPECTION AFTER EXCAVATION FOR THE LEACHING BED (PRIOR TO THE PLACEMENT OF STONE) AND ALSO AFTER PLACEMENT OF PIPE & STONE PRIOR TO BACKFILLING. 14.DESIGN ENGINEER SHALL CERTIFY CONSTRUCTION OF SYSTEM AND MATERIALS INSTALLED. THE CONTRACTOR SHALL PROVIDE A SIEVE ANALYSIS OF THE FILL MATERIAL REQUIRED. AN AS-BUILT PLAN SHALL BE SUBMITTED TO THE LOCAL BOARD OF HEALTH UPON COMPLETION. 15.NO RUBBER TIRE CONSTRUCTION MACHINERY SHALL DRIVE OVER THE PROPOSED SEPTIC BED EXCAVATION DURING CONSTRUCTION. 16.DIG-SAFE AND ALL OTHER NECESSARY AUTHORITIES SHALL BE NOTIFIED FOR THE PROPER LOCATION OF EXISTING UTILITIES PRIOR TO ANY EXCAVATION. 17.WATER SERVICE LINE SHALL BE LOCATED AND MARKED PRIOR TO ANY EXCAVATING AND 10' MIN. SETBACK DISTANCE FROM SAID SERVICE TO THE SEPTIC SYSTEM SHALL BE MAINTAINED. 18.ALL WATER LINES WITHIN 10' OF SEPTIC SYSTEM COMPONENTS SHALL BE SLEEVED WITHIN 4" PVC SCHEDULE 40 PIPE. LOCUS DESIGN DATA 1.TYPE OF ESTABLISHMENT: 4-BEDROOM SINGLE FAMILY RESIDENCE 2.SEWAGE SYSTEM DESIGN FLOW: 110 GALLONS PER BEDROOM = 110 x 4 = 440 GPD 3.NOTE: THIS SEPTIC SYSTEM IS NOT DESIGNED FOR A GARBAGE GRINDER 4.SEPTIC TANK CAPACITY REQUIRED, MINIMUM OF 200% OF DESIGN FLOW OR 1,500 GAL. = 200% x 440 GALLON = 880 GALLON (USE 1,500 GALLON TANK) 5.DESIGN PERCOLATION RATE: ASSIGNED LESS THAN 5 MINUTES PER INCH 6.SOIL ABSORPTION SYSTEM TYPE: CHAMBER SYSTEM 7.LEACHING AREA REQUIRED: MINIMUM 440 GPD / (0.74 GPD/S.F., CLASS I SOIL) = 594 S.F. 8.LEACHING SYSTEM PROPOSED: 33.5' LONG x 12.8' WIDE x 2' HIGH SYSTEM BOTTOM AREA PROPOSED = 12.8' x 33.5' = 428.8 S.F. SIDE AREA PROPOSED = 2 x (12.8' + 33.5') x 2' = 185.2 S.F. TOTAL AREA PROPOSED = = 614.0 S.F. 9.LEACHING SYSTEM CAPACITY PROPOSED = 614.0 S.F. x 0.74 GPD/S.F. = 454 GPD S=0.02 L=15' S=0.01 L=50'S=0.01 L=4' TO 16' PRECAST 500-GALLON CHAMBERS H-10 LOADING USE (3) 500-GALLON CHAMBERS WITH DOUBLE WASHED CRUSHED STONE 48" AT ENDS AND SIDES EFFECTIVE DIMENSIONS: LENGTH =33.5', WIDTH = 12.8', HEIGHT = 2.0'4.33'4.58'34"OVERALLHEIGHTH-20 D-BOX WITH SPEED LEVELERS 24"EFFECTIVESIDEWALL15' MIN. BREAKOUT GRADEBACK FILL WITH 9" MIN. 36" MAX. CLEAN MATERIAL PROPOSED SEPTIC TANK 1,500 GALLON, H-10 LOADING INLET AND OUTLET COVERS TO BE SET WITHIN 6-INCHES OF FINISHED GRADE 6" MIN. COMPACTED & STABLE CRUSHED STONE BASE FILTER FABRICS=2% MINIMUM GAS BAFFLE SCH. 40 PVC TEES10"14"TWO (2) RISER AND COVER TO BE SET TO WITHIN 6" OF FINISHED GRADE & SERVE AS INSPECTION PORT SEWAGE SYSTEM PROFILE & DETAILS NOT TO SCALE NOTES: 1.FURNISH RISERS TO SET COVERS WITHIN 6 INCHES OF FINISH GRADE. 2.H-10 SEPTIC TANK AND CHAMBERS AND H-20 DISTRIBUTION BOX (D-BOX), AND SCHEDULE 40 PVC PIPE THROUGHOUT. 3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING A TRENCH PERMIT FROM THE LOCAL MUNICIPALITY IN WHICH THE WORK IS BEING PERFORMED. PREPARED FOR: PREPARED BY: DRAWING TITLE: PROJECT: ASSESSORS INFORMATION: SUMMERFIELD PARK 800 FALMOUTH ROAD SUITE 301C MASHPEE, MA 02649 508.477.7272 PHONE 508.477.9072 FAX www.CapeEng.com SHEET NO.: OF DATE: DRAWN BY:CHECKED BY: 1 1 BARNSTABLE, MASSACHUSETTS MAPLEWOOD, NJ 07040 29 WOODLAND ROAD PHILIP HUBBARD WNH, RLR RLR, MC SEPTEMBER 14, 2023 MAP 124 PARCEL 004-010 DESCRIPTIONDATE CHKBY - NOTICE THIS PLAN MAY NOT BE ADDED TO, DELETED FROM, OR ALTERED IN ANY WAY BY ANYONE OTHER THAN CAPE & ISLANDS ENGINEERING, INC. UNLESS AND UNTIL SUCH TIME AS AN ORIGINAL (RED) STAMP APPEARS ON THIS PLAN NO PERSON OR PERSONS, MUNICIPAL OR PUBLIC OFFICIAL MAY RELY UPON THE INFORMATION CONTAINED HEREIN; AND THIS PLAN REMAINS THE PROPERTY OF CAPE AND ISLANDS ENGINEERING, INC. COPYRIGHT (C) BY CAPE & ISLANDS ENGINEERING, INC. ALL RIGHTS RESERVED 82 LIBERTY LANE 4' OF NATURALLY OCCURRING PERVIOUS MATERIAL DWELLING FIRST 2' SHALL BE SET LEVEL LIBERTY_82_HARBARD_SS 0 SCALE: 15 30 60 1" = 30' SITE & SEPTIC DESIGN PLAN SCHEDULE OF ELEVATIONS 1 FIRST FLOOR =61.5 2 TOP OF FOUNDATION =TBD 3 PIPE INV. AT FOUNDATION =51.00 4 INV. OF PIPE AT SEPTIC TANK INLET =50.75 5 INV. OF PIPE AT SEPTIC TANK OUTLET =50.50 6 INV. OF PIPE AT D-BOX INLET =50.00 7 INV. OF PIPE AT D-BOX OUTLET =49.83 8 INV. OF PIPE AT LEACHING FIELD INLET =49.66 9 BOTTOM OF LEACHING FIELD =47.66 10 TOP OF STONE 50.50 11 FINISHED GRADE OVER LEACHING FACILITY =53.5 - 52.8 12 FINISHED GRADE OVER D-BOX =53.0 13 FINISHED GRADE OVER SEPTIC TANK =52.5 14 FINISHED GRADE AT FOUNDATION =52.6 15 BOTTOM OF SEPTIC TANK =45.17 16 BASEMENT =52.75 1 2 14 3 4 5 6 7 8 9 10 11 12 13 15 16 6"SOIL EVALUATOR'S LOG PERCOLATION RATE = < 2 MINUTES / INCH IN C1 LAYER DEPTH TO GROUNDWATER = NONE ENCOUNTERED OBSERVATIONS BY: DAVID BENNETT, R.S. WITNESSED BY: GERRY DUNNING, R.S. DATE TESTED: APRIL 6, 2000 Depth from surface in inches Soil Horizon Soil Texture (USDA) Soil Color (Munsell) Soil Mottles and Depth Other Relative Factors TP#3 TP#4 DEEP OBSERVATION HOLES TP#3 EL. 57 & TP#4 EL. 57 0 - 6 0 - 6 A LOAMY SAND 10 YR 4/2 6 - 36 6 - 36 B LOAMY SAND 10 YR 6/6 36 - 132 36 - 132 C1 SAND 10 YR 8/3 NO PERC @ 48" TP#1 TP#2 DEEP OBSERVATION HOLES TP#1 EL. 53 & TP#2 EL. 53 0 - 8 0 - 8 A LOAMY SAND 10 YR 4/2 8 - 26 8 - 26 B LOAMY SAND 10 YR 6/6 26 - 132 26 - 132 C1 SAND 10 YR 8/3 NO PERC @ 38" CONSERVATION NOTES THE LIMIT OF WORK WILL BE INSTALLED PRIOR TO ANY WORK, EXCAVATION, CONSTRUCTION OR CLEARING OF VEGETATION, IN ORDER TO PREVENT DAMAGE TO THE INTERESTS OF THE ACT AND BYLAW. THE LIMIT OF WORK WILL CONSIST OF A ROW OF STAKED SEDIMENT STOP OR COMPOST ROLL WITH SILT FENCE BACKING. THE SEDIMENT STOP ROLL WILL BE REPLACED AS NECESSARY TO BE MAINTAINED IN GOOD CONDITION THROUGHOUT THE ENTIRE CONSTRUCTION PERIOD. NO FILL WILL BE ALLOWED TO BE PLACED AGAINST THE LIMIT OF WORK AT ANY TIME. UPON COMPLETION OF ALL CONSTRUCTION AND STABILIZATION OF THE SITE, SEDIMENT STOP ROLL WILL BE REMOVED AND PROPERLY DISPOSED OF. PRIOR TO ANY WORK COMMENCING, ADVANCE WRITTEN NOTIFICATION WILL BE PROVIDED TO THE LOCAL CONSERVATION COMMISSION. NO DEBRIS, EQUIPMENT OR MATERIALS WILL BE STORED, EVEN TEMPORARILY, OUTSIDE THE DESIGNATED LIMIT OF WORK AREA THE CONSTRUCTION SITE WILL BE CLEANED DAILY TO REMOVE ANY LOOSE DEBRIS. ALL DISTURBED AREAS WITHIN THE LIMIT OF WORK REQUIRING RESTORATION WILL BE STABILIZED TO PREVENT EROSION. STABILIZATION WILL BE DONE IMMEDIATELY FOLLOWING COMPLETION OF CONSTRUCTION. PROJECT STATISTICS 1.PROPOSED UNDISTURBED BUFFER WIDTH TO B.V.W.:90 FEET 2.PROPOSED DISTANCE FROM STRUCTURE TO B.V.W.: 123 FEET 3.PROPOSED DISTANCE FROM SEPTIC TANK TO B.V.W.: 169 FEET 4.PROPOSED DISTANCE FROM SEPTIC S.A.S. TO B.V.W.: 226 FEET B.O.H. GROUNDWATER PROTECTION REGULATION 1.LOCAL REGULATION: § 360-45 B. (1) MAXIMUM ALLOWABLE DISCHARGE OF SANITARY SEWAGE MAXIMUM WASTEWATER DISCHARGE ALLOWED = 440 GALLONS PER DAY PER 40,000 S.F. = 440 GPD x 76,200 S.F. / 40,000 S.F.) = 838 GPD 2.PROPOSED WASTEWATER DISCHARGE = 440 GALLONS PER DAY GENERAL NOTES LOCATIONS ARE BASED ON AN "ON THE GROUND" INSTRUMENT SURVEY AND ELEVATIONS BASED ON THE NAVD 1988 DATUM. COORDINATE SYSTEM USED IS THE MA-MAINLAND COORDINATE SYSTEM, DATUM: NAD 83, UNITS: U.S. SURVEY FEET. ZONING DISTRICT: RF LOT IS LOCATED WITHIN AN AREA HAVING A ZONE DESIGNATION OF ANNUAL CHANCE FLOOD ZONE 0.2% AND MINIMAL FLOOD HAZARD ZONE X BY THE FEDERAL EMERGENCY MANAGEMENT AGENCY (FEMA), ON FLOOD INSURANCE RATE MAP NO. 25001C0542J, WITH A MAP EFFECTIVE DATE OF JULY 16, 2014. THIS LOT IS LOCATED WITHIN A DEP APPROVED ZONE II WELLHEAD PROTECTION AREA. THIS LOT IS PARTIALLY MAPPED WITHIN A MESA NATURAL HERITAGE AND ENDANGERED SPECIES AREA. THIS LOT IS LOCATED WITHIN THE BARNSTABLE WELLHEAD PROTECTION OVERLAY DISTRICT THIS LOT IS LOCATED WITHIN THE SALTWATER ESTUARY PROTECTION DISTRICT. THIS LOT IS NOT LOCATED WITHIN THE RESOURCE PROTECTION OVERLAY DISTRICT. LOT COVERAGE. UNLESS THE APPLICANT DEMONSTRATES THAT ALL RUNOFF IS RECHARGED ON SITE, NO MORE THAN 15% OR 2,500 SQUARE FEET, WHICHEVER IS GREATER, OF THE TOTAL AREA OF ANY LOT SHALL BE RENDERED IMPERVIOUS BY THE INSTALLATION OF BUILDINGS, STRUCTURES AND PAVED SURFACES. IF ALL RECHARGE IS DISPOSED ON ON SITE, NO MORE THAN 50% OF THE TOTAL UPLAND AREA OF ANY LOT SHALL BE MADE IMPERVIOUS BY THE INSTALLATION OF BUILDINGS, STRUCTURES, AND PAVED SURFACES. FOR THE PURPOSES OF THIS SECTION, A TEMPORARY (I.E., NOT MORE THAN 182 DAYS) AIR-SUPPORTED OR REMOVABLE BUBBLE/DOME OVER A SPORTS AND RECREATION FACILITY’S OUTDOOR USE (E.G., OUTDOOR FIELD, TRACK, COURT, AND SWIMMING POOL) SHALL NOT BE CONSIDERED A BUILDING OR STRUCTURE. [AMENDED 8-17-2017 BY ORDER NO. 2017-165] SITE CLEARING. A MINIMUM OF 30% OF THE TOTAL UPLAND AREA OF ANY LOT SHALL BE RETAINED IN ITS NATURAL STATE. THIS SHALL NOT PREVENT THE REMOVAL OF DEAD, DISEASED OR DAMAGED TREES. WIND EXPOSURE CATEGORY: ZONE C PROPOSED LOT COVERAGE: LOT AREA = 76,200 S.F LOT COVERAGE BY IMPERVIOUS AREAS: HOUSE, GARAGE, DECK, PORCH = 3,540 S.F. (5%) LOT AREA RETAINED IN ITS NATURALLY VEGETATED STATE:= 26,800 S.F. (35%) DEED REFERENCE: CERTIFICATE 227529 PLAN REFERENCE:LC PLAN 42122-B OWNER: PHILIP HUBBARD & JOY K. CLEVELAND 29 WOODLAND ROAD, MAPLEWOOD, NJ 07040 NITROGEN LOADING LIMITATIONS 1.310 CMR 15.214: NITROGEN LOADING LIMITATIONS NITROGEN SENSITIVE AREA DESIGN FLOW LIMITED TO NO MORE THAN 440 GALLONS OF DESIGN FLOW PER DAY PER ACRE (1 ACRE = 40,000 SQUARE FEET) OR 550 GALLONS OF DESIGN FLOW PER DAY PER ACRE IF AN I/A NITROGEN REDUCING SYSTEM IS USED. 2.NITROGEN SENSITIVE AREA = DEP MAPPED ZONE II 3.LOT SIZE: 76,200 S.F. 4.MAXIMUM DESIGN FLOW = 440 GPD x (76,200 S.F. / 40,000 S.F.) = 838 GPD 5.PROPOSED SEWAGE SYSTEM DESIGN FLOW = 440 GPD LOCAL ORDINANCE WASTEWATER DISCHARGE 1.LOCAL ORDINANCE: § 232-3. - "NO PERSON, ... SHALL INSTALL A NEW INDIVIDUAL ON-SITE SEWAGE DISPOSAL SYSTEM WHICH WILL PRODUCE MORE THAN 330 GALLONS PER DAY OF WASTEWATER DISCHARGE UNLESS IN COMPLIANCE WITH THE STANDARDS ESTABLISHED BY § 232-5 ..." 2.§ 232-5 A. WASTEWATER FLOW < 330 GPD PER ACRE: 330 / 43560 x 76,200 = 577 GPD 3.PROPOSED WASTEWATER DISCHARGE = 440 GALLONS PER DAY5'BOTTOM OF TEST HOLE #1 & #2, EL. 42' NOTE: A SYSTEM OF GUTTERS, DOWNSPOUTS WITH LEACHING TRENCHES OR DRYWELLS SHALL BE USED TO RECHARGE STORMWATER RUNOFF. PRECAST H-20 DRYWELLS 3/4"-1-1/2" DOUBLE WASHED STONE ROOF LEADER OVERFLOW PIPE FINISH GRADE, VARIES SPLASH PLATE 8" MIN. LOAM COVER PIPE, S= 1.0% 4" HDPE DRAIN 2'2' INLET DRY WELL DETAIL -NOT TO SCALE- 12" MINIMUM BEDDING STONE 8' ACCESS COVER TO BE SET WITHIN 6-INCHES OF FINISHED GRADE