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REV <br />EXISTING WATER TABLE <br />12" PVC DRAIN I <br />SEE DETAIL <br />SM <br />PLACE PIPE INVERT AT WATER LINE �J <br />— ►I 4' --► <br />GIN <br />BEDROCK (SHALE) <br />EXISTING GROUND <br />10 <br />TYPICAL SLURRY TRENCH SECTION <br />SCALE: 1" = 10' <br />PLAIN PVC PIPE DETAIL <br />SCALE: 1 " - 1 <br />LIMIT OF SLOPING OR <br />BENCHING OF TRENCH WALL <br />2ANULAR FILL ASTM -33 NO. 67 <br />. -1.... I- .'IPE <br />REVISIONS <br />DESCRIPTION DATE APPROVED <br />Weiland. Inc. <br />Environmental Er Engineering <br />PO aox 1921 <br />Lyans. CO B0S40 <br />ph 303 -623 47951 <br />fax 303 - 623 -095B <br />PREPARED FOR: <br />N/ <br />TRENCH S1 <br />BASED <br />METHOD <br />EXISTING GRAVEL LAYER <br />PERFORATED PVC PIPE DETAIL <br />SCALE: 1- = 1 <br />SPRING LOADED <br />FLAP TYPE LID <br />PERFORATED TO ALLOW <br />SURCHARGING <br />CLEAN -OUT BOX AND LID <br />(SET TO FINISHED GRADE) <br />SERVICE CONNECTION 12" PVC <br />WITH 45' BEND <br />CROSS SECTION <br />(" � CLEAN -OUT PIPE DETAIL <br />2 3 NOT TO SCALE <br />BOKELMAN /WALTERS PIT <br />REGULAR 112 PERMIT APPLICATION <br />LARIMER COUNTY <br />LOVELAND READY MIX CONCRETE CO., INC. <br />GENERAL DRAIN DETAIL NOTES <br />1. <br />TRENCHES SHALL BE EXCAVATED SO THAT SIDEWALLS WILL BE <br />STABLE UNDER ALL WORKING CONDITIONS. TRENCH WALLS <br />SHALL BE SLOPED OR SUPPORT PROVIDED IN CONFORMANCE <br />WITH ALL LOCAL AND NATIONAL STANDARDS FOR SAFETY. <br />ONLY AS MUCH TRENCH SHALL BE OPEN AS CAN BE SAFELY <br />MAINTAINED. <br />2. <br />TRENCHES SHALL BE EXCAVATED TO THE DEPTH OF THE <br />GRAVEL LAYER TO ENSURE A GOOD HYDROLOGIC CONNECTION <br />BETWEEN THE GRAVEL LAYER AND THE PERIMETER DRAIN. <br />WHERE PLAIN PVC EXISTS ON PHASE I - WEST DRAIN, <br />CONSTRUCT TRENCH TO 6" BELOW REQUIRED ELEVATION FOR <br />BOTTOM OF PIPE. <br />3. <br />GROUNDWATER IS EXPECTED TO BE ENCOUNTERED DURING <br />TRENCH CONSTRUCTION. CONTROL GROUNDWATER IN THE <br />TRENCH THROUGH ACTIVE DEWATERING VIA PUMPS (SEE ASTM <br />F1668, 7.2). <br />4. <br />NATIVE GRAVEL (PIT RUN MATERIAL) SHALL BE USED TO FILL <br />THE TRENCH FROM BOTTOM CONTACT 'NTH THE GRAVEL LAYER <br />TO 1 FT. FROM THE SPECIFIED BOTTOM ELEVATION OF THE PIPE. <br />5. <br />FILTER MATERIAL SHALL BE ASTM C -33, SIZE NO. 67, WITH THE <br />PVC PIPE <br />ADDED CONSTRAINTS AS FOLLOWS: <br />A. FILTER MATERIAL SHALL CONTAIN NO MORE THAN 5% (BY <br />WEIGHT) OF MATERIAL FINER THAN THE NO. 200 SIEVE <br />B. ALL FINES (MINUS NO. 40 SIEVE) SHALL BE NONPLASTIC (PI= <br />0). <br />6. <br />THE FILTER MATERIAL SHALL BE PLACED ON THE GRAVEL LAYER <br />LL <br />OR GRAVEL BACKFILL IN LIFTS NOT TO EXCEED 1FT THICKNESS <br />WHEN COMPACTED WITH SURFACE PLATE VIBRATORS OR <br />VIBRATORY ROLLERS OR SHOULD NOT EXCEED THE LENGTH OF <br />THE INTERNAL VIBRATOR. FILTER MATERIAL BELOW THE PIPE <br />SHALL BE COMPACTED TO 90% MAXIMUM DRY DENSITY. <br />7. <br />PERFORATED PIPE SHALL BE FULLY PERFORATED 12" DIAMETER, <br />SDR -17 PVC, NTH 0.125' SLOT WIDTH (3.875" OD SLOT <br />LENGTH), 1" SLOT SPACING, AND CONFIGURED IN 4 ROWS <br />AROUND THE PIPE CIRCUMFERENCE <br />8. <br />PLAIN (NON - SLOTTED) PVC PIPE FROM PHASE I - WEST DRAIN <br />STA 13+00 TO THE OUTLET SHALL BE 12" SDR -17 PVC PIPE <br />9. <br />FILTER MATERIAL SHALL BE WORKED UNDER THE PIPE <br />HAUNCHES BY HAND. <br />10. <br />THE FILTER MATERIAL SHALL EXTEND A MINIMUM OF 12" ON <br />EVERY SIDE OF THE SLOTTED PIPE AT COMPLETION OF <br />CONSTRUCTION. <br />11. <br />EMBEDMENT MATERIAL FOR THE PLAIN PVC PIPE SHALL BE <br />ASTM C -33, SIZE NO. 67, WITH A 6" LAYER BENEATH THE PIPE <br />AND 1 FT_ THICK ON ALL OTHER SIDES. <br />12. <br />SURROUNDING THE SIDES AND TOP OF THE FILTER /EMBEDMENT <br />MATERIAL, AND KEYED 6 IN. UNDER FILTER MATERIAL (AS <br />SHOWN ON PERFORATED PVC PIPE DETAIL), PLACE A LAYER OF <br />MIRAR 140N GEOTEXTILE (OR EQUIVALENT) AS SMOOTH AS <br />POSSIBLE. MAKE OVERLAPS OF THE FABRIC AT LEAST 3 FT. <br />WIDE WHEN BEGINNING NEW FABRIC ROLL. <br />13. <br />NATIVE FILL WILL SERVE AS BACKFILL ABOVE THE FILTER <br />MATERIAL TO GRADE. <br />14. <br />PLAIN PVC PIPE BEDDING SHALL BE HAND TAMPED IN 12" LIFTS <br />AND SHALL CONFORM TO ASTM C -33, GRADATION SIZE NO. 67. <br />15. <br />PREVENT CONTAMINATION OF DRAINS AND FILTERS BY RUNOFF <br />CONTAINING SEDIMENT, DUST, CONSTRUCTION TRAFFIC, AND <br />MIXING WITH NEARBY FINE- GRAINED MATERIALS DURING <br />PLACEMENT AND COMPACTION. DRAIN AND FILTER MATERIAL <br />SHALL BE KEPT AT AN ELEVATION HIGHER THAN THE <br />SURROUNDING FINE - GRAINED MATERIALS DURING CONSTRUCTION <br />TO PREVENT CONTAMINATION BY SEDIMENT - CARRYING RUNOFF. <br />16. <br />PREVENT SEGREGATION OF THE FILTERED MATERIAL DURING <br />HANDLING AND PLACEMENT. <br />17. <br />PROPER IN -PLACE DENSITY IS REQUIRED TO BE NO LESS THAN <br />80- PERCENT RELATIVE DENSITY. GRANULAR MATERIALS <br />CONTAINING LITTLE OR NO FINES SHALL BE SATURATED DURING <br />COMPACTION TO PREVENT "BULKING" (LOW DENSITY) WHICH CAN <br />RESULT IN SETTLEMENT WHEN OVERBURDEN MATERIALS ARE <br />PLACED AND THE DRAIN IS SUBSEQUENTLY SATURATED BY <br />SEEPAGE FLOWS. <br />18. <br />GRADATION SHALL BE MONITORED CLOSELY SO THAT DESIGNED <br />FILTER CRITERIA ARE MET. <br />19. <br />THICKNESS OF LAYERS SHALL BE MONITORED TO ENSURE <br />DESIGNED DISCHARGED CAPACITY AND CONTINUITY OF THE <br />FILTER. <br />Permit �#^ M�-� O OQ /H - D_ ConfidentiaP? t9 <br />Class Type Seq49?r: 0--7 <br />MV# Inspection Date <br />Doc Date (if no date stamp) <br />Doc Name n P A T� (� %irL!! /7J0 1L� <br />From DRMSOther 44) 5z <br />To DRMS /Other <br />Recipients <br />EXHIBIT C -2 - SHEET 3 RECEIVED <br />FEB 2 2 2007 <br />DRAIN DETAILS AND NOTES Division ofRerlan,aton. <br />Mining and Safet <br />SCALE DWG NO. REV_ <br />AS SHOWN EXHIBIT C2 AR -1 SHEET 3.dwg REV <br />DRAWN BY <br />JWW <br />BY <br />DATE: <br />02/16/07 <br />SHEET <br />3OF3 <br />