TOWN OF GREENWICH, CONNECTICUT WILLIAM STREET BALL FIELD REMEDIATION WILLIAM STREET WEST, GREENWICH, CONNECTICUT

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1 TOWN OF GREENWICH, CONNECTICUT WILLIAM ST BALL FIELD REMEDIATION WILLIAM ST WEST, GREENWICH, CONNECTICUT MARCH 2016 SHEET NO. C-1 C-2 C-3 C-4 C-5 C-6 C-7 TITLE CONDITIONS PLAN HISTORICAL SAMPLE LOCATION PLAN PRE-REMEDIATION PLAN REMEDIATION PLAN REMEDIATION DETAILS RESTORATION PLAN AND DETAILS GENERAL NOTES SITE LOCATION OWNER: TOWN OF GREENWICH 101 FIELD POINT ROAD GREENWICH, CT AMY SIEBERT, P.E. COMMISSIONER DEPARTMENT OF PUBLIC WORKS PREPARED BY: SITE LOCATION

2 LEGEND FENCE MAPPING REFERENCE: 1) PLAN BASED ON A DRAWING TITLED " CONDITIONS SURVEY", DRAWING No. VT102, NEW LEBANON SCHOOL, BY LANGAN ENGINEERING, ENVIRONMENTAL, SURVEYING AND LANDSCAPE ARCHITECTURE, DATED AUGUST 24, 2015, LAST REVISED NOVEMBER 19, 2015, INCLUDING ALL NOTES AND REFERENCES THEREIN. FENCE 2) THE MERIDIAN OF THE SURVEY IS REFERENCED TO CONNECTICUT STATE PLANE COORDINATE SYSTEM NAD 83 AS ESTABLISHED THROUGH GPS METHODS. 3) ELEVATIONS SHOWN ARE REFERENCED TO NAVD 88 ESTABLISHED THROUGH GPS METHODS. 0 20' 40' CONDITIONS PLAN C-1

3 LEGEND HA-13-N5 HA-13-N6 HA-19 HA-13-N3 HA-13-N4 HA-20 HA-15 HA-14 HA-13-W4 FENCE HA-13-W3 HA-13-W2 HA-13-W1 HA-13-N2 HA-13-N1 HA-13 HA-13-E1 HA-13-E3 HA-13-E2 HA-13-E5 HA-16 HA-13-SW2 HA-13-S1 HA-13-E4 HA-17 HA-13-S2 HA-13-SE1 HA-22-W2 HA-22-W1 HA-22-N1 SB-8 HA-10-N1 HA-10-N2 HA-10-NE1 HA-9 HA-18 MONITORING WELL SOIL BORING HA-22-S1 HA-12 HA-11 HA-10-W4 HA-10-W3 HA-10-W1 HA-10 HA-10-E1 HA-10-W2 HA-10-S1 HA-10-E2 HA-5-N5 HA-5-N6 HA-10-SW3 HA-10-SW1 HA-10-SW2 HA-10-S2 HA-21-NE1 HA-21-NE2 HA-5-N3 HA-5-N4 HA-8-N1 FENCE HA-21-N2 HA-5-N2 HA-8-W1 HA-8 HA-8-E1 HA-6-N1 HA-21-N1 HA-5-N1 HA-5-E3 HA-5-E5 HA-8-S1 HA-7 HA-6-W1 HA-6 SB-7 HA-5 HA-5-E1 HA-5-E2 HA-6-S1 HA-21-S1 HA-5-S1 HA-5-E6 HA-5-E4 HA-5-S2 HA-4 HA-3 HA-2 HA ' 40' HISTORICAL SAMPLE LOCATION PLAN C-2

4 LEGEND PEDESTRIAN TRAFFIC ON SIDEWALK TO BE MAINTAINED AT ALL TIMES TRUCK WAITING AREA (SEE NOTE) ALL VEGETATION AND SITE FEATURES SHALL BE PROTECTED ALL UTILITIES TO BE PROTECTED PROTECT CURB WITH TEMPORARY RAMP FOR CONSTRUCTION ACCESS SIDEWALK TO BE PROTECTED PROPOSED STABILIZED CONSTRUCTION ENTRANCE (PRIMARY ENTRANCE) HA-19 HA-13-N6 HA-13-N5 HA-20 HA-13-N4 HA-13-N3 FENCE HA-13-N2 HA-13-E5 HA-13-E3 HA-16 HA-13-N1 HA-13-W3 HA-13-W4 HA-15 HA-14 HA-13-E1 HA-13-E2 HA-13 HA-13-W1 HA-13-W2 LIMITS OF HA-13-E4 HA-13-S1 HA-13-SW2 HA-17 HA-13-SE1 HA-13-S2 IM P ST S AC O OI TE A CK L D R P EA IL E HA-10-N2 HA-22-N1 HA-10-NE1 HA-22-W2 HA-10-N1 PROPOSED LIMITS OF REMEDIAL (0-1 FT.) HA-18 HA-9 HA-22-W1 HA-22-S1 HA-11 HA-10-W1 HA-10-W3 C O N LA TR YD A A O CT R W O EA N R HA-12 ALL VEGETATION AND SITE FEATURES SHALL BE PROTECTED HA-10 PROPOSED LIMITS OF REMEDIAL (0-2 FT.) HA-10-E1 HA-10-W4 HA-10-E2 HA-10-W2 SEDIMENT CONTROLS HA-10-SW1 HA-10-SW3 HA-5-N4 HA-5-N3 HA-10-SW2 LIMITS OF HA-10-S2 HA-21-NE1 HA-21-N2 REMOVE AND DISPOSE OF FENCE FENCE SITE SECURITY FENCE HA-5-N6 HA-5-N5 HA-10-S1 HA-21-NE2 HA-8-N1 HA-5-N2 HA-5-E5 HA-6-N1 HA-8 REMOVE AND DISPOSE OF FENCE HA-21-N1 HA-5-N1 HA-5-E3 HA-6 SB-7 HA-8-S1 HA-7 HA-5-E1 HA-5-E2 HA-5 HA-6-W1 HA-6-S1 HA-5-E6 HA-21-S1 HA-5-S1 HA-5-E4 C ST LEA O N A CK SO R P IL EA IL E HA-8-W1 HA-8-E1 SOIL BORING SB-8 HA-5-S2 HA-4 HA-3 HA-2 INSTALL SITE SECURITY FENCE AND SEDIMENT CONTROLS COMPLETELY AROUND WORK ZONE HA-1 LIMITS OF CONTRACTOR SHALL VERIFY DEPTHS OF AND PROTECT ALL UTILITIES 0 20' 40' PRE-REMEDIATION PLAN NOTES: 1. THE CONTRACTOR SHALL NOTIFY CBYD 72 HOURS PRIOR TO THE START OF ANY SUB WORK. 2. TRUCKS MAY USE ON-ST PARKING AREAS ALONG THE EASTBOUND SIDE OF WILLIAM ST AS SHOWN TO WAIT FOR LOADING AS NECESSARY. WAITING TRUCKS MAY NOT IDLE FOR LONGER THAN 3 MINUTES IN ACCORDANCE WITH CT STATE LAW. C-3

5 LEGEND HA-13-N5 HA-13-N6 HA-19 HA-13-N3 HA-13-N4 HA-20 HA-13-N2 HA-15 HA HA-13-N1 HA-13-W3 HA-13-W HA-13-W1 HA-13 HA-13-W2 HA-13-E1 HA-13-E3 109 HA-13-E2 HA-13-E5 HA-16 ARSENIC AREA AS-3 HA-13-SW2 HA-13-S1 HA-13-S2 HA-13-SE1 HA-13-E4 HA-17 SOIL IMPACTED AREA STOCKPILE 112 HA-22-W2 113 HA-22-W1 HA-22-N1 SB-8 HA-10-N1 HA-10-N2 HA-10-NE1 HA-9 HA-18 SOIL BORING PROPOSED LIMITS OF REMEDIAL (0-1 FT.) HA-12 CONTRACTOR LAYDOWN AREA HA-11 HA-22-S1 HA-10-W1 HA-10-W3 HA-10-W4 HA-10-W2 HA-10-SW1 HA-10-SW HA-10-SW2 HA-10-E1 HA-10 HA-10-S1 HA-10-S2 116 HA-10-E2 HA-21-NE1 HA-21-NE2 HA-5-N5 HA-5-N HA-5-N4 HA-5-N PROPOSED LIMITS OF REMEDIAL (0-2 FT.) SITE SECURITY FENCE SEDIMENT CONTROLS STAKE-OUT POINT (SEE TABLE) 101 HA-8-W1 HA-8-N1 102 HA-8-E1 HA-8 ARSENIC AREA AS-2 ARSENIC AREA AS-1 HA-6-N1 120 HA-21-N2 HA-21-N1 121 HA-5-N2 HA-5-N1 HA-5-E3 HA-5-E5 HA-8-S HA-7 HA-6-W1 HA-6 HA-6-S1 122 SB-7 HA-21-S1 HA-5 HA-5-E1 HA-5-S1 HA-5-E HA-5-E6 STAKE-OUT TABLE CLEAN SOIL AREA STOCKPILE HA-5-E4 HA-5-S ARSENIC AREA AS-4 HA-4 HA-3 HA-2 HA-1 NOTES: 1. THE CONTRACTOR WILL BE RESPONSIBLE FOR EXCAVATING ALL SOIL WITHIN THE REMEDIATION LIMITS TO THE DEPTHS SPECIFIED. 2. THE CONTRACTOR'S LICENSED SURVEYOR SHALL STAKEOUT ALL VERTICES OF LIMITS PRIOR TO THE START OF. 3. THE CONTRACTOR AND SURVEYOR SHALL REFER TO THE SITE SURVEYING AND REMEDIAL NOTES FOUND ON SHEET C-7 REGARDING, SURVEYING, CONFIRMATION SAMPLING AND BACKFILLING. 4. THE CONTRACTOR MAY CREATE STOCKPILES WHERE SHOWN FOR ARSENIC SOIL AS WELL AS CLEAN FILL. IF ANY STOCKPILES EXCEED 1,000 CUBIC YARDS IN VOLUME, THE CONTRACTOR SHALL SUBMIT REGISTRATION FOR THE CTDEEP GENERAL PERMIT FOR CONTAMINATED SOIL AND/OR SEDIMENT MANAGEMENT. 5. THE SANITARY SEWER AND STORM DRAIN LINES SHOWN SHALL BE MARKED OUT AND PROTECTED DURING ALL WORK. 0 20' 40' REMEDIATION PLAN C-4

6 SOIL 6 MIL POLYETHYLENE COVER HAY BALES SURROUNDING PILE SAND BAGS SOIL GALVANIZED STEEL FABRIC SECTIONAL TEMPORARY FENCE SECTIONS JOINED AT EACH SEGMENT TOP RAIL AS NECESSARY BUT NOT LESS THAN 50 FT. 3 FT. MOUNTABLE BERM (6" MIN.) (OPTIONAL) SIDEWALK, CURB, PAVEMENT PRIVACY SCREEN GEOTEXTILE PREPARED GROUND 20 MIL HIGH DENSITY POLYETHYLENE LINER BETWEEN TWO LAYERS OF 16 OZ. NON-WOVEN GEOTEXTILE 8'-0" GROUND PROFILE MINIMUM 8" OF 2"-4" AGGREGATE OVER LENGTH AND WIDTH OF STRUCTURE CONTAMINATED STOCKPILE MANAGEMENT BOTTOM RAIL BASE PLATE AS NECESSARY BUT NOT LESS THAN 50 FT. DETAIL NOTES: GEOTEXTILE SEPARATION FABRIC AS REQUIRED 6" (MIN.) COMPACTED GRAVEL TEMPORARY SECURITY FENCE 10' MAX. C. TO C. WOVEN WIRE FENCE (MIN. 14 1/2 GAUGE, MAX. 6" MESH SPACING) 60" MIN. FENCE POSTS, DRIVEN MIN. 24" INTO GROUND 1) CONTRACTOR SHALL MAINTAIN INTEGRITY OF SECURITY FENCING AND ENCLOSURE AT ALL TIMES. 2) POSTS ARE TO BE SET INTO THE GROUND OR SHALL BE CONNECTED TO BASE PLATES THAT ARE SUFFICIENTLY WEIGHTED TO RESIST OVERTURNING. 20' (MIN.) WIDTH PLAN 10 FT. (MIN.) TEMPORARY CONSTRUCTION ENTRANCE FROM / TO WILLIAM ST WEST R=20' 60' (MIN.) PAVEMENT TEMPORARY ACCESS ROAD FLOW FLOW HEIGHT OF FILTER = 24" MIN. 6" MIN. STABILIZED CONSTRUCTION ENTRANCE NOTES: PERSPECTIVE VIEW 1) STONE SIZE - USE 2-4 INCH STONE, OR RECLAIMED OR RECYCLED CONCRETE BALES BUTT TOGETHER STOCKPILED MATERIAL OR WORK AREA HAY BAIL 4" (MIN.) SECTION WOVEN WIRE FENCE WITH FILTER CLOTH OVER EMBED FILTER CLOTH MIN. 6" INTO GROUND SILT FENCE NOTES: FLOW 6" MIN. SECTION 30" MIN. 12" MIN. UNDISTURBED GROUND SILT FENCE EROSION CONTROL N.T.S 2) LENGTH - AS NECESSARY BUT NOT LESS THAN 50 FT. 3) THICKNESS - NOT LESS THAN 8 INCHES. 4) WIDTH - 20 FT. (MIN.) 5) ACCESS ROAD ENTRANCE - 20' RADI (MIN.) FOR TURNS 6) GEOTEXTILE - WILL BE PLACED OVER THE ENTIRE AREA PRIOR TO PLACING STONE. 7) WATER - ALL WATER FLOWING OR DIVERTED TOWARD CONSTRUCTION ENTRANCES SHALL BE PIPED BENEATH THE ENTRANCE. IF PIPING IS IMPRACTICAL, A MOUNTABLE BERM WITH 5:1 SLOPE WILL BE PERMITTED. 8) MAINTENANCE - THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOWING OF SEDIMENT ONTO THE PUBLIC RIGHTS-OF-WAY OR ADJACENT PRIVATE PROPERTY, ALL SEDIMENT SPILLED, DROPPED, WASHED OR TRACKED ONTO THESE AREAS SHALL BE REMOVED IMMEDIATELY. PLAN HAY BALE EROSION CONTROL N.T.S WOVEN WIRE FENCE TO BE FASTENED SECURELY TO FENCE POSTS WITH WIRE TIES OR STAPLES. POSTS: TYPE OR 2" HARDWOOD. FILTER CLOTH TO BE FASTENED SECURELY TO WOVENFENCE: WIRE FENCE WITH TIES SPACED EVERY 24" AT TOP WOVEN WIRE, 14 1/2 GA. AND MID SECTION. 6" MAX. MESH OPENING. FILTER CLOTH: WHEN TWO SECTIONS OF FILTER CLOTH ADJOIN EACH FILTER X. MIRAFI 100X. OTHER THEY SHALL BE OVERLAPPED BY SIX INCHES STABILINKA T140N OR AND FOLDED. APPROVED EQUAL. 9) WHEN WASHING IS REQUIRED, IT SHALL BE DONE ON AN AREA STABILIZED WITH STONE AND WHICH DRAINS INTO AN APPROVED SEDIMENT TRAPPING DEVICE. 10) PERIODIC INSPECTION AND NEEDED MAINTENANCE SHALL BE PROVIDED AFTER EACH RAIN EVENT. 11) PROTECT CONCRETE CURB AND SIDEWALK FROM DAMAGEWITH THE USE OF ASPHALT RAMPS AND ROAD PLATING. 4. MAINTENANCE SHALL BE PERFORMED AS NEEDED AND MATERIAL REMOVED WHEN "BULGES" DEVELOP IN THE SILT FENCE. REMEDIATION DETAILS C-5

7 LEGEND REMOVE AND DISPOSE OF TEMPORARY CONSTRUCTION ENTRANCE AND ACCESS ROAD MATERIALS. RESTORE / REPLACE DISTURBED SIDEWALK AND CURBS AS DIRECTED BY THE ENGINEER RESTORE FIELD TURF RESTORE TURF FIELD RESTORE INFIELD SOIL RESTORE INFIELD SOIL GRADE AND SEED ALL AREAS DISTURBED BY CONTRACTORS OPERATIONS RESTORE FIELD TURF REMOVE AND DISPOSE OF TEMPORARY SITE SECURITY FENCE AND GATES. TEMPORARY SEDIMENT CONTROL FEATURE ARE TO REMAIN IN PLACE UNTIL ESTABLISHMENT OF RESTORED S (SEE NOTE) PROPOSED GROUND PROPOSED GROUND SEEDING, AS SPECIFIED GRADE AS REQUIRED 6" (MIN.) SITE FILL TOP SOIL, UNIFORMLY MIXED WITH REQUIRED FERTILIZER, TAMPED OR ROLLED TO GRADE BOTTOM OF RESTORE TURF FIELD N.T.S 6" OR 18" 6" (MIN.) SITE FILL INFIELD SOIL MIXTURE AS SPECIFIED BOTTOM OF RESTORE INFIELD SOIL N.T.S 6" OR 18" NOTES: 1. THE SURVEYOR SHALL CONFIRM THE FINISHED GRADES ARE AS SPECIFIED FOF ALL AREAS PRIOR TO THE START OF RESTORATION 2. LOAM AND SEED SHALL BE PLACED AS SHOWN. GRASS SEED WILL CONFORM TO THE FOLLOWING SPECIFICATION: 85% BLUEGRASS SEED MIX, 15% PERENNIAL RYEGRASS MIX 3. THE CONTRACTOR SHALL RESTORE DISTURBED AREAS OF THE INFIELD AS SHOWN 4. THE CONTRACTOR SHALL REMOVE AND DISPOSE OF ALL MATERIALS USED TO CREATE THE TEMPORARY ACCESS ROAD. GRADING AND S WITHIN THIS AREA SHALL BE RESTORED TO CONDITIONS. ANY AREAS AFFECTED BY DRAINAGE OR RUNOFF FROM THE TEMPORARY ACCESS ROADS SHOULD BE RESTORED TO PRIOR CONDITIONS. 5. IN THE VICINITY OF THE TEMPORARY CONSTRUCTION ENTRANCE TO/FROM WILLIAM ST, THE CONTRACTOR SHALL REPAIR THE SIDEWALK AND CURB TO THE ORIGINAL CONDITIONS WHERE THE STRUCTURES WERE REMOVED OR DAMAGED. 6. THE CONTRACTOR SHALL RESTORE ALL AREAS DISTURBED BY REMEDIATION TRAFFIC AND OTHER PROJECT ACTIVITIES (INCLUDING PATHS, WALKWAYS, FENCING, GATES AND LAWN AREAS) TO PRE-REMEDIATION CONDITIONS. 7. SEDIMENT AND EROSION CONTROLS ARE TO REMAIN IN PLACE AFTER SITE RESTORATION HAS BEEN COMPLETED UNTIL ALL DISTURBED S ARE STABILIZED. THE CONTRACTOR IS RESPONSIBLE FOR MAINTAINING THE SEDIMENT AND EROSION CONTROLS UNTIL THE RESTORED AREAS ARE STABILIZED. THE CONTRACTOR IS RESPONSIBLE FOR REMOVAL AND DISPOSAL OF ALL SEDIMENT AND EROSION CONTROLS WHEN APPROVED BY THE ENGINEER. 8. THE CONTRACTOR SHALL COORDINATE WITH ENGINEER AND OWNER FOR FINAL SITE CLOSEOUT. 9. THE CONTRACTOR SHALL GRADE THE FINISHED SUCH THAT POSITIVE DRAINAGE OCCURS ACROSS THE FIELD. 0 20' 40' RESTORATION PLAN AND DETAILS C-6

8 GENERAL NOTES 1. SEQUENCING OF SOIL REMEDIATION ACTIVITIES WILL BE COORDINATED WITH THE ENGINEER AND OTHER ON-SITE CONTRACTORS. IT WILL INCLUDE AND OFF-SITE REMOVAL OF CT REGULATED WASTE AND POSSIBLE HAZARDOUS WASTE. 2. CONDITIONS, AS PRESENTED, REPRESENT THOSE CURRENT AS OF THE DATE OF THE FIELD SURVEY. THE CONTRACTOR IS RESPONSIBLE FOR FIELD VERIFICATION OF SITE CONDITIONS PRIOR TO THE START OF WORK. 3. THE UTILITIES SHOWN HAVE BEEN LOCATED FROM DRAWINGS BY OTHERS. THE ENGINEER MAKES NO GUARANTEE THAT THE UNDERGROUND UTILITIES SHOWN COMPRISE ALL SUCH UTILITIES IN THE AREA, EITHER IN SERVICE OR ABANDONED. THE ENGINEER FURTHER DOES NOT WARRANT THAT THE UNDERGROUND UTILITIES SHOWN ARE IN THE EXACT LOCATION INDICATED. THE ENGINEER HAS NOT PHYSICALLY LOCATED THE UNDERGROUND UTILITIES. UNDER NO CIRCUMSTANCES SHALL THE CONTRACTOR START ANY KIND OF WORK PRIOR TO OBTAINING ALL THE NECESSARY INFORMATION REGARDING THE UNDERGROUND UTILITIES AT THE SITE. 4. ALL SHALL BE ACCOMPLISHED IN SUCH A MANNER THAT UNDERGROUND/OVERHEAD UTILITIES OR STRUCTURES ARE NOT DAMAGED. IT SHALL BE THE CONTRACTOR'S SOLE RESPONSIBILITY FOR ANY DAMAGE INCURRED DURING OPERATIONS. THE CONTRACTOR SHALL IMMEDIATELY REPAIR ANY PIPE OR UTILITY DAMAGED DURING REMEDIATION AT NO COST TO THE OWNER. 5. ALL FUEL, OIL, PAINT OR ANY OTHER HAZARDOUS MATERIALS SHALL BE STORED IN A SECONDARY CONTAINMENT AREA AND SECURED IN A LOCKED AREA WITH AN IMPERVIOUS FLOOR DURING NON-WORK HOURS. 6. A SUPPLY OF ABSORBENT SPILL RESPONSE MATERIAL SUCH AS BOOMS OR BLANKETS SHALL BE MADE AVAILABLE AT THE CONSTRUCTION SITE AT ALL TIMES TO CLEAN UP POTENTIAL SPILLS OF HAZARDOUS MATERIALS SUCH AS GASOLINE AND OIL. 7. SPILLS OF HAZARDOUS MATERIALS SHALL BE REPORTED IMMEDIATELY TO: DEPARTMENT OF ENERGY AND ENVIRONMENTAL PROTECTION OIL AND CHEMICAL SPILLS UNIT (860) OR THE CONTRACTOR SHALL BE RESPONSIBLE FOR NOTIFYING CALL-BEFORE-YOU-DIG AT A MINIMUM OF 72 HOURS IN ADVANCE OF ANY SUB WORK TO ARRANGE FOR THE MARK OUT OF UNDERGROUND UTILITIES. CONNECTICUT CALL BEFORE YOU DIG THE CONTRACTOR IS RESPONSIBLE FOR SECURING ALL SITE TRAFFIC GATES AT THE END OF EACH CONSTRUCTION DAY. 10. THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE TRANSPORT AND DISPOSAL OF ALL WASTES GENERATED DURING THE PROJECT. 11. THE CONTRACTOR SHALL COORDINATE ANY REQUIRED UTILITY WORK WITH THE RESPECTIVE UTILITY. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL COORDINATION AND COSTS ASSOCIATED WITH THE CUSTOMER OWNED SERVICES AND FOR ALL UTILITY WORK MADE FOR THE CONTRACTOR'S CONVENIENCE, INCLUDING TEMPORARY UTILITY RELOCATION(S) AND/OR RECONNECTION(S). 12. S RESTRICTING PEDESTRIAN FOOT TRAFFIC SHALL INDICATE CONSTRUCTION IN PROGRESS, DO NOT ENTER. S SHALL BE ORANGE REFLECTIVE BACKGROUND WITH BLACK LETTERING AND CONSTRUCTED FROM A DURABLE MATERIAL THAT WILL REMAIN IN GOOD CONDITION THROUGHOUT THE PROJECT. S SHALL BE CONSPICUOUSLY POSTED AT EACH SIDEWALK/WALKWAY. 13. WASHOUT OF APPLICATORS, CONTAINERS, VEHICLES AND EQUIPMENT FOR CONCRETE, PAINT, AND OTHER MATERIALS SHALL ONLY BE CONDUCTED WITHIN THE LAYDOWN AREAS. SUCH WASHOUT SHALL BE CONDUCTED IN AN ENTIRELY SELF-CONTAINED WASHOUT SYSTEM. ALL WASTE INCLUDING WASTEWATER AND HARDENED CONCRETE FROM WASHOUTS SHALL BE COMPLETELY COLLECTED AND DISPOSED OF AT A PERMITTED OFF-SITE DISPOSAL FACILITY. NO WASHOUT MATERIALS OR WASTES SHALL BE RELEASED OR DISCHARGED ON-SITE. SITE SURVEYING 1. THE CONTRACTOR SHALL RETAIN THE SERVICES OF A LAND SURVEYOR LICENSED IN THE STATE OF CONNECTICUT FOR ALL SURVEYING WORK ON THE PROJECT AND SHALL SUBMIT THE SURVEYOR'S NAME AND LICENSE NUMBER, COMPANY NAME AND ADDRESS TO THE ENGINEER PRIOR TO THE START OF WORK AT THE SITE. 2. THE LICENSED SURVEYOR STATED ABOVE SHALL LOCATE AND IDENTIFY IN THE FIELD ANY SITE S IN THE VICINITY OF THE PROPOSED WORK AS APPLICABLE PRIOR TO THE START OF REMEDIATION. 3. SURVEYOR IS REQUIRED TO ESTABLISH A HORIZONTAL AND VERTICAL CONTROL ON-SITE TO PERFORM FIELD SURVEY WORK. 4. RECORD DRAWINGS OF THE PROJECT SHALL BE PREPARED AND STAMPED BY A LAND SURVEYOR LICENSED IN THE STATE OF CONNECTICUT AND SUBMITTED TO THE ENGINEER UPON COMPLETION OF THE WORK. RECORD DRAWINGS FOR ALL S ARE TO INCLUDE: a. GRADES PRIOR TO. b. FINAL LIMITS (VERTICAL AND HORIZONTAL). c. LOCATIONS OF ALL CONFIRMATION SAMPLES PRIOR TO BACKFILLING. d. FINAL AS BUILT FINISHED GRADES FOLLOWING COMPLETION OF REMEDIATION. PRE-REMEDIATION 1. LIMITS WILL BE STAKED OUT BY THE CONTRACTOR AT THE COORDINATES LISTED ON SHEETS C-4 FOR EACH INDIVIDUAL. 2. TEMPORARY FENCING AND GATES WILL BE INSTALLED TO CONTROL SITE ACCESS DURING CONSTRUCTION AS SHOWN ON SHEET C-3. TEMPORARY CONSTRUCTION ENTRANCE TO/FROM WILLIAM ST PERMITS THE CONTRACTOR IS REQUIRED TO CONSTRUCT A TEMPORARY CONSTRUCTION ENTRANCE TO/FROM WILLIAM ST WHERE SHOWN TO ACCESS THE CONTRACTOR LAYDOWN AREA. THE CONTRACTOR WILL BE REQUIRED TO PERFORM THE FOLLOWING. a. CONSTRUCT THE ACCESSWAY ACCORDING TO THE TEMPORARY CONSTRUCTION ENTRANCE DETAIL AND DRAWINGS. b. MAINTAIN SIDEWALK FOR PEDESTRIAN TRAFFIC. c. PROTECTION OF AND VEGETATION ALONG WILLIAM ST. REMEDIAL 1. THE CONTRACTOR SHALL EXCAVATE TO THE LIMITS SHOWN. 2. STOCKPILES OF IMPACTED SOIL WILL BE ALLOWED WITHIN THE DEATED STOCKPILE AREA SHOWN ON SHEET C-3. ANY SOIL DEEMED HAZARDOUS SHALL BE REQUIRED TO BE DIRECT LOADED AND TRANSFERRED TO AN APPROVED DISPOSAL FACILITY. 3. NECESSARY DECONTAMINATION PROCEDURES SHALL BE ADHERED TO BY ALL PERSONNEL AND FOR ALL EQUIPMENT WHEN HANDLING CONTAMINATED SOILS. 4. THE CONTRACTOR SHALL PERFORM WASTE CHARACTERIZATION OF ALL MATERIALS TO BE EXCAVATED. THE CONTRACTOR SHALL COLLECT SAMPLES AND ARRANGE FOR LABORATORY ANALYSES REQUIRED BY THE SELECTED DISPOSAL FACILITY FOR THE MATERIAL. 5. THE CONTRACTOR SHALL COORDINATE DISPOSAL FACILITY ACCEPTANCE OF THE MATERIAL. 6. THE CONTRACTOR SHALL PREPARE THE WASTE SHIPPING DOCUMENTATION AND PROVIDE THIS TO THE ENGINEER FOR REVIEW AND ATURE BY THE OWNER. 7. THE CONTRACTOR SHALL RETAIN THE SERVICES OF A CT LICENSED LAND SURVEYOR TO ASSIST WITH THE SOIL REMOVAL AND DOCUMENTATION. 8. FOLLOWING THE ENGINEER'S APPROVAL, THE CONTRACTOR SHALL EXCAVATE THE SOIL WITHIN THE REMEDIATION AREA TO THE APPROVED BOTTOM ELEVATIONS AND TO THE HORIZONTAL EXTENTS SHOWN IN THE CONTRACT DRAWINGS. THE SURVEYOR SHALL CONFIRM REQUIRED DEPTHS HAVE BEEN ACHIEVED PRIOR TO ANY BACKFILL, AS DIRECTED BY THE ENGINEER. 9. THE CT LICENSED SURVEYOR SHALL SURVEY FLAGGED CONFIRMATION SAMPLE LOCATIONS PRIOR TO BACKFILLING. 10. THE ENGINEER SHALL PROVIDE FOR THE LABORATORY ANALYSIS OF CONFIRMATION SAMPLES AND WITHIN 5 DAYS OF CONFIRMATION SAMPLE COLLECTION, SHALL PROVIDE WRITTEN DIRECTIVE TO THE CONTRACTOR AS TO WHETHER ADDITIONAL IS REQUIRED AND IF SO, TO THE REQUIRED EXTENT. 11. THE CONTRACTOR SHALL EXCAVATE ADDITIONAL MATERIAL PER THE ENGINEER'S DIRECTION AND THE CONFIRMATION SAMPLING PROCESS SHALL BE REPEATED IN AREAS OF ADDITIONAL UNTIL THE ENGINEER HAS DIRECTED IN WRITING THAT THE FOR THE AREA HAS BEEN COMPLETED. 12. THE SURVEYOR SHALL LOCATE THE FINAL HORIZONTAL AND VERTICAL LIMITS OF THE INCLUDING THE BOTTOM ELEVATION. 13. THE CONTRACTOR SHALL BACKFILL THE REMEDIAL TO ACHIEVE THE APPROPRIATE FINISHED GRADES AND REQUIRED CLEAN BACKFILL COVER DEPTH. 14. THE SURVEYOR SHALL PREPARE AND PROVIDE FINAL REMEDIATION RECORD DRAWINGS FOR EACH AREA. THESE RECORD DRAWINGS SHALL MEET THE DRAWING REQUIREMENTS LISTED ABOVE UNDER SITE SURVEYING RECORD DRAWING REQUIREMENTS a. - d. RECORD DRAWINGS SHALL INCLUDE THE BOTTOM ELEVATION AND FINISHED GRADE AT EACH GRID NODE. THE RECORD DOCUMENTS SHALL BE PROVIDED TO THE ENGINEER IN EACH OF THE FOLLOWING FORMATS: a. POINT DATA (.txt,.csv,.xls) b. AUTOCAD (.dwg) c. HARD COPY (signed and sealed by the CT licensed land surveyor) 15. HORIZONTAL LIMITS MAY EXTEND BEYOND THE LIMITS SHOWN BASED ON CONFIRMATION SAMPLE RESULTS AS DIRECTED BY THE ENGINEER. SOIL MANAGEMENT 1. IMPACTED SOIL MAY BE STOCKPILED AS SHOWN ON SHEET C-3 AND IN ACCORDANCE WITH THE DETAIL ON SHEET C-7. THE CONTRACTOR SHALL ADHERE TO ALL DEEP GENERAL PERMIT REQUIREMENTS FOR STOCKPILE STAGING. BACKFILLING 1. THE CONTRACTOR SHALL BACKFILL REMEDIAL S CONDUCTED TO 1 FT. BELOW GRADE WITH APPROXIMATELY 6 INCHES OF GENERAL FILL OVERLAIN BY APPROXIMATELY 6 INCHES OF TOPSOIL OR INFIELD SOIL, PROVIDING A TOTAL BACKFILL DEPTH OF NO LESS THAN 12 INCHES. S CONDUCTED TO 2 FT. BELOW GRADE SHALL BE BACKFILLED WITH APPROXIMATELY 18 INCHES OF GENERAL FILL OVERLAIN BY APPROXIMATELY 6 INCHES OF TOPSOIL OR INFIELD SOIL, PROVIDING A TOTAL BACKFILL DEPTH OF NO LESS THAN 24 INCHES. 2. THE CONTRACTOR WILL CONFIRM THAT BACKFILL BROUGHT ON-SITE WILL BE FROM A VIRGIN SOURCE AND AN AREA OF NO KNOWN RELEASES. CONTRACTOR SHALL PROVIDE SAMPLE DATA FOR EVERY 1000 CUBIC YARDS OF BACKFILL MATERIAL TO BE BROUGHT ON-SITE. ALL IMPORTED BACKFILL TO BE USED ON-SITE SHALL NOT CONTAIN ANY DETECTABLE CONCENTRATIONS OF PCBs, VOLATILE ORGANIC COMPOUNDS, SEMI-VOLATILE ORGANIC COMPOUNDS, EXTRACTABLE TOTAL PETROLEUM HYDROCARBONS, PESTICIDES OR HERBICIDES THAT MAY BE INDICATIVE OF A RELEASE. METALS CONCENTRATIONS REPORTED IN SAMPLES OF IMPORTED BACKFILL MATERIALS SHALL BE BELOW NUMERICAL CRITERIA SPECIFIED IN THE CT REMEDIATION STANDARD REGULATIONS (RESIDENTIAL DIRECT EXPOSURE CRITERIA AND GA POLLUTANT MOBILITY CRITERIA.). 3. THE CONTRACTOR SHALL SUBMIT ANALYTICAL AND GEOTECHNICAL DATA FOR ANY SOIL INCLUDING TOPSOIL THAT WILL BE USED AS BACKFILL. 4. THE CONTRACTOR SHALL SECURE AND MAINTAIN OPEN REMEDIAL S PRIOR TO BACKFILLING S. RESTORATION 1. THE CONTRACTOR'S LICENSED SURVEYOR SHALL CONFIRM THE FINISHED GRADES ARE AS SPECIFIED FOR ALL AREAS PRIOR TO THE START OF RESTORATION. 2. LOAM AND SEED SHALL BE PLACED AT ALL GRASS RESTORATION AREAS SHOWN ON SHEET C-6. GRASS SEED MIX WILL CONFORM TO THE FOLLOWING SPECIFICATION: 85% BLUEGRASS SEED MIX, 15% PERENNIAL RYEGRASS MIX 3. CONTRACTOR SHALL RESTORE DISTURBED AREAS OF THE INFIELD AS SHOWN ON SHEET C THE CONTRACTOR SHALL REMOVE AND DISPOSE OF ALL MATERIALS USED TO CREATE TEMPORARY ACCESS ROADS. GRADING AND S WITHIN THESE AREAS SHOULD BE RESTORED TO CONDITIONS. ANY AREAS AFFECTED BY DRAINAGE OR RUNOFF FROM THE TEMPORARY ACCESS ROADS SHOULD BE RESTORED TO PRIOR CONDITIONS. 5. IN THE VICINITY OF THE TEMPORARY CONSTRUCTION ENTRANCE TO/FROM WILLIAM ST THE CONTRACTOR SHALL REPAIR THE SIDEWALK AND CONCRETE CURB TO THE ORIGINAL CONDITIONS WHERE THE STRUCTURES WERE DAMAGED. 6. CONTRACTOR SHALL RESTORE ALL AREAS DISTURBED BY REMEDIATION TRAFFIC AND OTHER PROJECT ACTIVITIES (INCLUDING PATHS, WALKWAYS AND LAWN AREAS) TO ORIGINAL CONDITION. 7. SEDIMENT AND EROSION CONTROLS ARE TO REMAIN IN PLACE AFTER SITE RESTORATION HAS BEEN COMPLETED UNTIL ALL DISTURBED S ARE FULLY STABILIZED. 8. CONTRACTOR TO COORDINATE WITH ENGINEER AND OWNER FOR FINAL SITE CLOSEOUT. 1. COMPLIANCE WITH ALL PROJECT PERMIT CONDITIONS IS THE RESPONSIBILITY OF THE CONTRACTOR. ALL FEES ASSOCIATED WITH APPLYING AND OBTAINING ANY REMAINING REQUIRED PERMITS WILL BE MADE AT THE EXPENSE OF THE CONTRACTOR. 2. THE CONTRACTOR WILL APPLY FOR ALL REMAINING WORK PERMITS AS REQUIRED. THESE INCLUDE BUT ARE NOT LIMITED TO: NOISE ORDINANCE PERMIT(S) IF CONSTRUCTION IS EXPECTED TO OCCUR OUTSIDE OF WORKING HOURS (WEEKDAYS 7 AM TO 5 PM). A NOISE ORDINANCE PERMIT WILL BE REQUIRED BY THE TOWN FOR ANY WORK PERFORMED OUTSIDE OF WORKING HOURS. A NEW PERMIT WILL BE REQUIRED FOR EACH INDIVIDUAL REQUEST OUTSIDE OF WORKING HOURS. TO APPLY FOR THE PERMIT, CONTACT: TOWN OF GREENWICH HEALTH DEPARTMENT (203) UNLESS THE CONTRACTOR REGISTERS WITH CT DEEP PURSUANT TO THE REQUIREMENTS OF THE GENERAL PERMIT FOR CONTAMINATED SOIL AND/OR SEDIMENT MANAGEMENT, THE CONTRACTOR WILL NOT BE ALLOWED TO STORE GREATER THAN 1000 CY OF NON-HAZARDOUS CONTAMINATED SOIL ON-SITE AT ANY ONE TIME. PROTECTION OF S 1. S THAT ARE TO BE PROTECTED ON-SITE AND NOT TO BE REMOVED OR DISTURBED ARE CALLED OUT ON THE DRAWINGS. EFFORT SHOULD BE TAKEN BY CONTRACTOR TO NOT DISTURB AND PROTECT EACH DEATED TO REMAIN AND ITS ENTIRE ROOT AND DRIP ZONE. 2. THE CONTRACTOR WILL USE WHITE RIBBON TO TIE OFF ALL S THAT ARE DEATED TO REMAIN AND BE PROTECTED DURING THE WORK. SEDIMENT AND EROSION CONTROL 1. TEMPORARY SEDIMENT AND EROSION CONTROLS SHALL BE INSTALLED AROUND THE PERIMETER OF THE WORK AREA AND INDIVIDUAL AREAS. SEE SHEET C-3 FOR SEDIMENT AND EROSION CONTROL PLACEMENT INFORMATION. 2. THE CONTRACTOR SHALL TAKE APPROPRIATE DUST CONTROL MEASURES DURING. THIS INCLUDES BUT IS NOT LIMITED TO THE USE OF A WATER TRUCK FOR DUST SUPPRESSION. 3. THE CONTRACTOR SHALL INSPECT ALL EROSION AND SEDIMENT CONTROL MEASURES ON A ROUTINE BASIS AND AFTER EVERY STORM EVENT AND SHALL REPAIR AND MAINTAIN AS NECESSARY. 4. ALL SEDIMENT AND EROSION CONTROLS ARE TO REMAIN IN PLACE AFTER REMEDIATION AND SITE RESTORATION IS COMPLETED UNTIL ALL DISTURBED S ARE FULLY STABILIZED. REMEDIATION TRAFFIC ROUTING 1. THE CONTRACTOR SHALL COORDINATE TRAFFIC FLOW FOR TRUCKING USING THE TEMPORARY CONSTRUCTION ENTRANCE TO/FROM THE DEATED LAYDOWN AREA. TRUCKING FOR OFF-SITE DISPOSAL WILL BE REQUIRED TO CHECK-IN AT THE SITE AND WILL USE THE WILLIAM ST SHOULDER AND PARKING AREAS LOT FOR WAITING UNTIL LOADING. 2. CONTRACTOR SHALL POST AGE AT THE CONSTRUCTION ENTRANCE FROM WILLIAM ST INDICATING CONSTRUCTION ENTRANCE, AUTHORIZED VEHICLES ONLY. S SHALL BE ORANGE REFLECTIVE BACKGROUND WITH BLACK LETTERING AND CONSTRUCTED FROM A DURABLE MATERIAL THAT WILL REMAIN IN GOOD CONDITION THROUGHOUT THE PROJECT. S SHALL BE CONSPICUOUSLY POSTED AT THE ENTRANCE. 3. CONTRACTOR SHALL DEATE A DETAIL FOR CONSTRUCTION TRAFFIC AT THE ENTRANCE AND EGRESS INTERSECTIONS OF THE CONSTRUCTED ACCESS WAY AND WILLIAM ST. GENERAL NOTES 4. THE CONTRACTOR SHALL SUBMIT A TRAFFIC CONTROL PLAN FOR THE PROPOSED WORK PRIOR TO REMEDIATION AND CONSTRUCTION ACTIVITIES AND PROVIDE TRAFFIC CONTROL DURING ACTIVITIES AFFECTING LOCAL ROADS. C-7