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Home My WebLink AboutSW5200602_Plan (SCM Detail)_202010201� 3 MIN INFLOW PIPE SEDIMENTATION CHAMBER 6" #57 WASHED 2' RIP RAP STONE 3" GRAVEL / STONE SURFACE EL 439.5 CLEAN -OUT (PVC PIPE W / GLUED CLEAN -OUT FITTINGS AND SCREW TYPE CAP) 3" GRAVEL / STONE SURFACE .444.00 RIP RAP BERM (CLASS B) SANFILTER MEDIA (ASTM C-33 SAND OR EQUIVALENT) 1.5' MEDIA 6'X6' OVERFLOW OUTLET CONTROLSTRUCTURE - RIM. ELEV 445.00 6" PERFORATED UNDER DRAIN @ 0.5% SLOPE V 100 YR ELEV. = 445.57 PROFILE VIEW N.T.S EL 447.00 3 MIN. 30" RCP OUTFLOW PIPE 436.79 1' GRAVEL LAYER NOTICE TO CONTRACTOR: SCARIFY BOTTOM PRIOR TO INSTALLATION OF UNDER DRAIN SYSTEM (DO NOT COMPACT) PEAK CONTROL POST -DEVELOPMENT POST -ROUTING ELEVATION STORM EVENT RUNOFF (CFS) RUNOFF (CFS) EL 442.25 TOP OF DAM 447.00 3" GRAVEL /STONE SURFACE 0 0 0 2 YR 21.18 1.2 443.45 o EL 442.00 (Top Sandfilter) 10 YR 28.93 3.17 444.40 25 YR 39.72 8.47 445.01 100 YR 60.86 45.75 445.57 FILTER FABRIC PROVIDED REQUIRED ELEVATION 1.5' SAND FILTER MEDIA DDV 10267 CF 8935 CF 443.10 (ASTM C-33 SAND OR EQUIVALENT) SAND FILTER 4500 SF 4468 SF 442.00 NOTE: EL 440.5 1. SAND FILTER IS SIZED FOR DDV AND CHECKED FOR FREEBOARD. `I �.. WASHED 12" I`,I``,I` rat #57 STONE `�' `I `tlt't .�I 2. PER GEO-TECHNICAL REPORT PREPARED BY TERRACON CONSULTANTS, INC. RALEIGH, NC. EL439.5 THERE IS NOT ANY GROUND WATER ENCOUNTERED AT SAND FILTER 1 LOCATION. FILTER FABRIC 6" PERFORATED PIPE/GRAVEL UNDER DRAIN SYSTEM 3. CONSTRUCTION OF SAND FILTER FACILITY AND STORM STRUCTURES COMPLY WITH NC DEQ GUIDELINES. 4. MAINTENANCE AND INSPECTION REQUIREMENT COMPLY WITH NC DEQ GUIDELINES. TYPICAL SECTION N.T.S 5. SAND FILTER SHALL BE INSPECTED ONCE A QUARTER AND WITHIN 24 HOURS AFTER EVERY STORM EVENT GREATER THAN 1.0 INCHES (OR 1.5 INCHES IF IN A COASTAL COUNTY). RECORD OF OPERATION AND MAINTENANCE WILL BE KEPT IN A KNOWN SET LOCATION AND WILL BE AVAILABLE UPON REQUEST. NCDEQ Stormwater BMP Manual NCDEQ Stormwater BMP Manual Table 1: Sample Operation and Maintenance Provisions fop, Sand Filters Sand filters shall be inspected at least once a quarter and shall be maintained as needed to remove surface sediment accumulation, trash, debris, and leaf litter to prevent the filter from clogging. Sediment should be cleaned out of the fore bay/sed i me ntatio n chamber when it Entire BMP" Trash/debris is present. Remove the trash/debris. accumulates to a depth of more than 6 inches. During inspection, structures such as outlets and flow diversions should be checked at least annually for damage or degradation. Figure 6 shows an example of a sand filter that is overdue for maintenance. Adjacent pavement (if Sediment is present on the Sweep or vacuum the sediment applicable) pavement surface. as soon as possible. Figure 6. Sand Filter Overdue for Maintenance Perimeter of sand filter Areas of bare soil and/or Regrade soil if necessary to Clogged Sediment Chamber Clogged Sand Chamber erosive gullies have formed. remove the gully, and then „ plant a ground cover and water until it is established. Provide Al a lime and a one-time fertilizer All" ;Ul application. l Vegetation is too short or too Maintain vegetation at an r l long. appropriate height. (p t Flow diversion structure The structure is clogged. Unclog the conveyance and dispose of any sediment offsite. a The structure is damaged. Make any necessary repairs or replace if damage is too large for repair. r � Forebay or pretreatment area Sediment has accumulated to a Search for the source of the depth of greater than six sediment and remedy the inches. problem if possible. Remove the sediment and stabilize or Important maintenance procedures for a sand filter include: dispose of it in a location where it will not cause impacts to streams or the BMP. 1. Manage the drainage area to reduce the sediment load to the sand filter. 2. Clean out the sedimentation chamber or forebay whenever sediment depth exceeds six Erosion has occurred. Provide additional erosion inches. protection such as reinforced turf matting or riprap if needed 3. At least once a year, skim the sand media. to prevent future erosion problems. 4. Replace the sand filter media whenever it fails to function properly after maintenance. Weeds are present. Remove theweeds, preferably 5. Inspect the sand filter at least quarterly. Any problems that are found shall be repaired by hand. If a pesticide is used, immediately. wipe it on the plants rather than spraying. Maintain operation and maintenance records in a known set location. Operation and maintenance records will be available upon request. Filter bed and underdrain Water is ponding on the surface Check to see if the collector collection system for more than 24 hours after a system is clogged and flush if storm. necessary. If water still ponds, remove the top few inches of C-6. Sand Filter C-6. Sand Filter 7 Revised: 1-3-2017 8 Revised: 1-3-2017 SANDFILTER 1 NCDEQ Stormwater BMP Manual ' filter bed media and replace. If water still ponds, then consult an expert. Outlet device Clogging has occurred. Clean out the outlet device. Dispose of the sediment offsite. The outlet device is damaged Repair or replace the outlet device. Receiving water Erosion or other signs of Contact the NC Division of damage have occurred at the Water Resources. outlet. C-6. Sand Filter 9 Revised: 1-3-2017 ALUMINUM GRATING R REQUIRED, SEE DETAIL \ BELOW 6.00' 6.00' RISER CREST I E: 445.00 oa r,. 2.0'Wxl.O'H WEIR (^ ^ IE:444.00 TRASH RACK W/#2 BAR TOP OF SANDFILTER & BOTTOM OF POND IE: 442.00 BOTTOM OF SANDFILTER IE: 440.50 6" ORIFICE I E: 439.50 , L 1 .N r <, 0" RG l�l INV is If L ,N� r V�;,li muk� ml W��rii y, t, L L, 8'X8'X1.5' CONC FOOTING POND 1 / SANDFILTER - OUTLET STRUCTURE DETAIL N.T.S. NOTE: GRATING SECTION SHALL BE FASTENED TO THE SUPPORTS WITH A MINIMUM OF FOUR (4) SADDLE CLIP ANCHORS DESIGNED TO FIT OVER TWO (2) BEARING BARS WITH STUD BOLTS, WASHERS AND NUTS. ALUMINUM RIVETED GRATIN (1-1 /8" X 7") 1 /4" ALUMINUM ANGLE 3" x 2" x 3/8", LLV 1 /2"0 S.S. EXP. ANCHORS @ 2'-0" O.C. 3 1 /2" MIN. EMBEDMENT INSIDE FACE OF CONC. BOX GRATING DETAIL NOT TO SCALE 3' CARRY RIP RAP UP SPILLWAY SIDES OF SPILLWAY _ Fr -SILT FENCE CLASS 1 OR 2 RIP RAP ZIP RAP APRON .\ "ZOW FA (5' MIN.) �I ELEVATION OF POND SPILLWAY NOT TO SCALE POND SPILLWAY SPILLWAY CREST SPILLWAY CREST ID BOTTOM LENGTH ELEV. NUMBER WIDTH (L) (H) SF 1 10'MIN. 10' 446.00 NOTE: CONTRACTOR TO REMOVE SILT FENCING AFTER POST -CONSTRUCTION ACTIVITIES HAVE BEEN COMPLETED, AND POND SLOPES HAVE BEEN STABILIZED. POND 1 / SANDFILTER OVERFLOW EMERGENCY SPILLWAY N.T.S. 4H:1 V SIDE SLOPES #5 WASHED STONE ON OUTER SURFACE OF BERM ACROSS SPILLWAY NO STONE THRU BERM O m n CONSULTANTS: Civil: Stantec 801 Jones Franklin Road, Suite 300 Raleigh, NC 27606 ME_ SSC Engineering, Inc. 18207 Edison Ave. Chesterfield, MO 63005 z O Q O O U rn � ti CN = U � Z UJ J m J G > UJ � Z U 0 UJ >UJ J Q UJ � aco UJ ..,;COOPERATIVE BUILDING SOLUTIONS M11 II 1V ' III "II III 'll 'W °"^I II 111,11,°ro1u. II C 0 I ,. �U"r��r.P' PROFESSIONAL RECORD ' % 082 " 08/14/202 DATE 07-10-2020 PROJECT NUMBER 19.025 TITLE SANDFILTER 1 DETAILS SHEET 304 SEDIMENTATION CHAMBER 6" #57 WASHED 2' RIP RAP STONE 1� 3 MIN INFLOW PIPE 3" GRAVEL / STONE SURFACE SAND FILTER 2 BMP SUMMARY CHART CLEAN -OUT (PVC PIPE W / GLUED CLEAN -OUT FITTINGS AND SCREW TYPE CAP) PEAK CONTROL STORM EVENT POST -DEVELOPMENT RUNOFF (CFS) POST -ROUTING RUNOFF (CFS) ELEVATION TOP OF DAM 450.00 2 YR 5.8 0.89 446.88 10 YR 10.6 1.14 447.46 25 YR 14.48 1.31 447.93 100 YR 22.07 5.30 448.56 PROVIDED REQUIRED ELEVATION DDV 6713 CF 2559 CF 446.70 SAND FILTER 1500 SF 1200 SF 446.00 NOTE: 1. SAND FILTER IS SIZED FOR DDV AND CHECKED FOR FREEBOARD. 2. PER GEO-TECHNICAL REPORT PREPARED BY TERRACON CONSULTANTS, INC. RALEIGH, NC. THERE IS NOT ANY GROUND WATER ENCOUNTERED AT SAND FILTER 1 LOCATION. 3. CONSTRUCTION OF SAND FILTER FACILITY AND STORM STRUCTURES COMPLY WITH NC DEQ GUIDELINES. 4. MAINTENANCE AND INSPECTION REQUIREMENT COMPLY WITH NC DEQ GUIDELINES. 5. SAND FILTER SHALL BE INSPECTED ONCE A QUARTER AND WITHIN 24 HOURS AFTER EVERY STORM EVENT GREATER THAN 1.0 INCHES (OR 1.5 INCHES IF IN A COASTAL COUNTY). RECORD OF OPERATION AND MAINTENANCE WILL BE KEPT IN A KNOWN SET LOCATION AND WILL BE AVAILABLE UPON REQUEST. 3" GRAVEL/STONE SURFACE .448.00 RIP RAP BERM (CLASS B) SANFILTER MEDIA (ASTM C-33 SAND OR EQUIVALENT) 1.5' MEDIA 4'X4' OVERFLOW OUTLET CONTROLSTRUCTURE - RIM. ELEV 448.50 V 100 YR ELEV. = 448.56 2.0' W x 0.5' H rec weir DDV ELEV. = 446.70 \ \ CL +' 0.UU 6" PERFORATED UNDER DRAIN @ 0.5% SLOPE PROFILE VIEW N.T.S EL 450.00 3 MIN. 1F-j 18" RCP OUTFLOW PIPE ELEV 443.5 I' GRAVEL LAYER NOTICE TO CONTRACTOR: SCARIFY BOTTOM PRIOR TO INSTALLATION OF UNDER DRAIN SYSTEM (DO NOT COMPACT) ALUMINUM GRATING R REQUIRED, SEE DETAIL \ BELOW 4°00' 4°00' INV i EL 446.25 3" GRAVEL / STONE SURFACE 1 2� EL 446.00 (Top Sandfilter)�_ i ,r� FILTER FABRIC 1.5' SAND FILTER MEDIA (ASTM C-33 SAND OR 6'X6'X0.50' EQUIVALENT) CONC FOOTING EL 444.5 �y � WASHED 12" ��.; #57STONE EL 443.5 FILTER FABRIC 6" PERFORATED PIPE / GRAVEL UNDER DRAIN SYSTEM TYPICAL SECTION N.T.S SANDFILTER 2 POND 1 / SANDFILTER - OUTLET STRUCTURE DETAIL N.T.S. NOTE: GRATING SECTION SHALL BE FASTENED TO THE SUPPORTS WITH A MINIMUM OF FOUR (4) SADDLE CLIP ANCHORS DESIGNED TO FIT OVER TWO (2) BEARING BARS WITH STUD BOLTS, WASHERS AND NUTS. ALUMINUM RIVETED GRATIN (1-1/8" X 7") ALUMINUM ANGLE 3" x 2" x 3/8", LLV 1 /2"0 S.S. EXP. ANCHORS @ 2'-0" O.C. 3 1/2" MIN. EMBEDMENT INSIDE FACE OF CONC. BOX GRATING DETAIL NOT TO SCALE /4" NCDEQ Stormwater BMP Manual NCDEQ Stormwater BMP Manual NCDEQ Stormwater BMP Manual IN a i n to n rice Table 1: Sarrafale Operation and Maintenance Provisions for Sand Filters filter bed media and replace. If water still ponds, then consult Sand filters shall be inspected at least once a quarter and shall be maintained as needed to • ° " ®, , , e ° an expert. remove surface sediment accumulation, trash, debris, and leaf litter to prevent the filter from �1N 3' clogging. Sediment should be cleaned out of the fore bay/sed i me ntatio n chamber when it Entire BMPTrash/debris is present. Remove the trash/debris. Outlet device Clogging has occurred. Clean out the outlet device. CARRY RIP RAP UP SPILLWAY LENGTH/-4H:IV ' accumulates to a depth of more than 6 inches. During inspection, structures such as outlets Dispose of the sediment offsite. SIDES OF SPILLWAYS SIDE SLOPES and flow diversions should be checked at least annually for damage or degradation. Figure 6 shows an example of a sand filter that is overdue for maintenance. Adjacent pavement (if Sediment is present on the Sweep or vacuum the sediment applicable] pavement surface. as soon as possible. The outlet device is damaged Repair or replace. the outlet I Ogg device. / 0 T 2" Figure 6: Sand Filter Overdue for 1lrlaiarteaaaapce x o Perimeter of sand filter Areas of bare soil and/or Regrade soil if necessary to 1 o0 0 Clogged Sediment Chamber Clog ged Sand Chamber erosive gullies have formed. remove the gully, and then Receiving water Erosion or other signs of Contact the NC Division of SILT FENCE 99 99 damage have occurred at the Water Resources. I r plant a ground cover and water V x #5 WASHED STONE ON 2 until it is established. Provide outlet. CLASS 1 OR 2 lime and cone -time fertilizer � application. 3 x RIP RAP H OUTER SURFACE OF TH IP RAP APRON BERM ACROSS SPILLWAY Vegetation is too short or too Maintain vegetation at an NO STONE THRU BERM e long, appropriate height. ER �s lr t Flow diversion structure The structure is clogged. Unclog the conveyance and 0�. dispose of any sediment offsite. F�Ow (5' MIN.) (, The structure is damaged. Make any necessary repairs or \ ' replace if damage is too large x_ x%` ELEVATION OF POND SPILLWAY for repair. NOT TO SCALE Forebay or pretreatment area Sediment has accumulated to a Search for the source of the depth of greater than six sediment and remedy the inches. problem if possible. Remove the sediment and stabilize or Important maintenance procedures for a sand filter include: dispose of it in a location where POND SPILLWAY SPILLWAY CREST SPILLWAY CREST it will not cause impacts to 1. Manage the drainage area to reduce the sediment load to the sand filter. streams or the BMP. ID BOTTOM LENGTH ELEV. NUMBER WIDTH W (H) 2. Clean out the sedimentation chamber or forebay whenever sediment depth exceeds six Erosion has occurred. Provide additional erosion inches. protection such as reinforced , , turf matting or riprap if needed SF 2 10 MIN. 10 449.00 3. At least once a year, skim the sand media. to prevent future erosion problems. 4. Replace the sand filter media whenever it fails to function properly after maintenance. Weeds are present. Remove the weeds, preferably NOTE: CONTRACTOR TO REMOVE SILT FENCING 5. Inspect the sand filter at least quarterly. Any problems that are found shall be repaired by hand. If a pesticide is used, AFTER POST -CONSTRUCTION ACTIVITIES HAVE BEEN immediately. wipe it on the plants rather than COMPLETED, AND POND SLOPES HAVE BEEN STABILIZED. spraying. Maintain operation and maintenance records in a known set location. Operation and maintenance records will be available upon request. Filter bed and underdrain Water is ponding on the surface Check to see if the collector collection system, for more than 24 hours after a system is clogged and flush if storm. necessary. If water still ponds, remove the top few inches of C-6. Sand Filter 7 Revised: 1-3-2017 C-6. Sand Filter 8 Revised: 1-3-2017 C-6. Sand Filter 9 Revised: 1-3-2017 POND 1 / SANDFILTER OVERFLOW EMERGENCY SPILLWAY N.T.S. O W m .E n CONSULTANTS: C= Stantec 801 Jones Franklin Road, Suite 300 Raleigh, NC 27606 MEP/FP: SSC Engineering, Inc. 18207 Edison Ave. Chesterfield, MO 63005 Z O Q O O U rn CN = U � Z LLI J m J G > LLI U) Z U 0::D U LU LLI > J Q LLI LLI � a co N ..,;COOPERATIVE BUILDING SOLUTIONS ll E ' III L.. III � 41, 'W ILI 1b W!."'1p. MIL.. F A� D D [�� r,0,J h#'2 0 7 / 1 I..L/,�:? O�:? o J �l," m C 0 I S I..,O:',r,/ " ,mf4 / ,2 0�r2 0 PROFESSIONAL RECORD t,rttlllfilllll7 ' % CaA 082 " 08/14/202 DATE 07-10-2020 PROJECT NUMBER 19.025 TITLE SANDFILTER 2 DETAILS SHEET 305 1 VEGETATIVE FILTER STRIP VEGETATIVE FILTER STRIP V I 20' 1 1 1 i rvv v111�11.� II o'A' lJ r 30 I I ;;;;°Prrra�Gara 1 1 I 1 SWALE / FORBAY J 1 1 LEVELSPREADER 1 1 #57 STONE 1 0 LEVEL SPREADER FILTER STRIP 2 PLAN VIEW ; I z�F � M LEVEL SPREADER FILTER STRIP 1 SECTION A -A N.T.S. NOTE: 1. LEVEL SPREADER_ FILTER STRIP IS SIZED FOR HANDLE THE FLOW DURING 10-YEAR STORM EVENT. 2. CONSTRUCTION OF LEVEL SPREADER_ FILTER STRIP COMPLY WITH NCDEQ STORMWATER BMP MANUAL C-9. 3. MAINTENANCE AND INSPECTION REQUIREMENT COMPLY WITH NCDEQ STORMWATER BMP MANUAL C-9. 21 . LEVEL SPREADER FILTER STRIP 1 SECTION B-B N.T.S. O m .E a n ARCHITECT: 16150 Main Circle Drive, Suite 100 St. Louis, MO 63017 (636) 449-1175 / fax (636) 449-1176 CONSULTANTS: Civil: Stantec 801 Jones Franklin Road, Suite 300 Raleigh, NC 27606 MEP/FP: SSC Engineering, Inc. 18207 Edison Ave. Chesterfield, MO 63005 E LI wIII'°°i I i Da [[µµµµ r,�U,J #ry2 7 /1 � / ?� 2y�°�Iu phA yy Iu, ��y Iu %N�i/ 14f,�N,��%��iN PROFESSIONAL RECORD ' \ GA'r 082 08/14/202 DATE 07-10-2020 PROJECT NUMBER 19.025 TITLE LEVEL SPREADER _FILTER STRIP DETAILS SHEET 306