B3_W912HY19R0017-WWTP_Plans_P1_20190813.pdf

PDF 29 MB Posted Aug 13, 2019

Attached to: Port Isabel Detention Center (PIDC) Kitchen/Waste Water Treatment Plant (WWTP
Solicitation number: W912HY-19-R-0017
Issued by: Department of the Army Corps of Engineers Engineering District Galveston

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Waste Water Treatment Plant Drawings Part 1

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File	Type	Posted
B3_W912HY19R0017_Amendment_0004.pdf	PDF	Sep 5, 2019
B3_W912HY19R0017-WWTP_Plans_P4_20190813.pdf	PDF	Aug 13, 2019
B3_W912HY19R0017_Amendment_0003.docx	DOCX document	Aug 13, 2019
B3_W912HY19R0017-WWTP_Plans_P2_20190813.pdf	PDF	Aug 13, 2019
B3_W912HY19R0017-WWTP_Plans_P3_20190813.pdf	PDF	Aug 13, 2019
B3_Attachment_1_-_Request_for_Record_Checks.pdf	PDF	Aug 9, 2019
B3_W912HY19R0017_Amendment_0002.pdf	PDF	Aug 9, 2019
W912HY19R0017U0001_Amendment_1.pdf	PDF	Aug 7, 2019
B3_W912HY19R0017-Plans_P1_20190807.pdf	PDF	Aug 7, 2019
B3_W912HY19R0017-Plans_P2_20190807.pdf	PDF	Aug 7, 2019
B3_W912HY19R0017-Specs_20190807_.pdf	PDF	Aug 7, 2019

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2-GA001

SOLICITATION NO.:

CONTRACT NO.:

ISSUE DATE:

USACE SIGNATURE BLOCK AREA

SMALL PROJECT INDEX AREA / AE STAMPS

BUFFALO DISTRICT

PORT ISABEL DETENTION CENTER

KITCHEN AND WASTEWATER

TREATMENT PLANT IMPROVEMENTS

VOLUME 2

W912HY-19-R-0017

W912HY-19-C-XXXX

17 JULY 2019

PROJECT

LOCATION

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2-GA002

SHEET INDEX TABLE

SHEET NUMBER SHEET TITLE

2-GA001 COVER SHEET

2-GA002 SHEET INDEX

2-GA003 SUMMARY OF QUANTITIES

2-G-001 GENERAL LEGEND AND ABBREVIATIONS

2-G-002 GENERAL NOTES

2-G-003 GENERAL NOTES

2-G-004 GENERAL NOTES

2-G-005 PROCESS FLOW DIAGRAM

2-G-006 PROCESS DESIGN SUMMARY

2-G-007 HYDRAULIC PROFILE

2-G-008 SITE PUMP STATION PROCESS AND INSTRUMENTATION DIAGRAM

2-G-009 WASTEWATER TREATMENT PLANT PROCESS AND INSTRUMENTATION DIAGRAM

2-G-010 WASTEWATER TREATMENT PLANT PROCESS AND INSTRUMENTATION DIAGRAM

2-G-011 WASTEWATER TREATMENT PLANT PROCESS AND INSTRUMENTATION DIAGRAM

2-G-012 WASTEWATER TREATMENT PLANT PROCESS AND INSTRUMENTATION DIAGRAM

2-G-013 EQUIPMENT SCHEDULES

2-G-014 EQUIPMENT SCHEDULES

2-G-015 PROJECT FIRM

2-C-100 SITE PUMP STATION EXISTING CONDITIONS

2-C-101 SITE PUMP STATION DEMOLITION PLAN

2-C-102 SITE PUMP STATION DEMOLITION PLAN

2-C-103 SITE PUMP STATION SITE PLAN

2-C-104 SITE PUMP STATION GRADING AND PAVING PLAN

2-C-105 SITE PUMP STATION PLAN AND PROFILE

2-C-106 SITE PUMP STATION SECTION VIEW

2-C-107 WASTEWATER TREATMENT PLANT EXISTING CONDITIONS

2-C-108 WASTEWATER TREATMENT PLANT DEMOLITION PLAN

2-C-109 OVERALL WASTEWATER TREATMENT PLANT DEMOLITION PLAN

2-C-110 HEADWORKS DEMOLITION PLAN

2-C-111 RAS WAS PUMP STATION DEMOLITION PLAN

2-C-112 WASTEWATER TREATMENT PLANT SITE PLAN

2-C-113 WASTEWATER TREATMENT PLANT GRADING AND PAVING PLAN

2-C-114 WASTEWATER TREATMENT PLANT POINT TABLE

2-C-115 WASTEWATER TREATMENT PLANT PLAN AND PROFILE

2-C-116 WASTEWATER TREATMENT PLANT PLAN AND PROFILE

2-C-300 HEADWORKS PLAN VIEW

2-C-301 HEADWORKS SECTION VIEWS

2-C-302 HEADWORKS SECTION VIEWS

2-C-303 HEADWORKS PIPING PLAN

2-C-304 HEADWORKS PIPING PLAN

2-C-305 CHLORINE CONTACT BASIN REHABILITATION

2-C-306 FINAL CLARIFIER NO. 1 SOUTH REHABILITATION

2-C-307 FINAL CLARIFIER NO.2 NORTH REHABILITATION

2-C-501 SITE PUMP STATION MANHOLE DETAILS

2-C-502 WASTEWATER TREATMENT PLANT MANHOLE DETAILS

2-C-503 JOINT LAYOUT

2-C-504 SITE DETAILS

2-C-505 SITE DETAILS

2-C-506 SITE DETAILS

2-C-507 SITE DETAILS

2-C-508 SITE DETAILS

2-C-509 SITE DETAILS

2-C-510 SITE DETAILS

2-C-511 SITE DETAILS

2-E-001 ELECTRICAL SYMBOL LEGEND AND NOTES

2-E-101 SITE PUMP STATION ELECTRICAL PLAN

2-E-102 WASTEWATER TREATMENT PLANT ELECTRICAL PLAN

2-E-501 ELECTRICAL BUILDING

2-E-502 ELECTRICAL BUILDING

2-E-503 ELECTRICAL BUILDING

2-E-504 ELECTRICAL BUILDING

2-E-505 ELECTRICAL BUILDING

2-E-601 ONE LINE DIAGRAM & SCHEDULES

2-E-602 ONE LINE DIAGRAM & SCHEDULES

2-S-101 HEADWORKS STRUCTURAL

2-S-102 HEADWORKS STRUCTURAL

2-S-103 HEADWORKS STRUCTURAL

2-S-104 RAS/WAS STRUCTURAL

2-S-501 STRUCTURAL DETAILS

2-S-502 STRUCTURAL DETAILS

2-S-503 STRUCTURAL DETAILS

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2-GA003

SITE PUMP STATION LIFT STATION SUMMARY OF INSTALLATION QUANTITIES

ITEM NO. QUANTITY UNITS DESCRIPTION

E1 90 LF 4" DISCHARGE PIPING

E2 1 EA 4" VENT

E3 1 EA ACCESS HATCH

E4 1 EA PRE-CAST LIFT STATION

E5 2 EA SUBMERSIBLE PUMP

E6 27 CY CONCRETE

E7 7 CY GROUT

E8 191 CY AGGREGATE BACKFILL

E9 2 EA 4" PLUG VALVES

E10 2 EA 4" CHECK VALVES

E11 1 EA JIB CRANE

E12 1 EA ACCESS HATCH

E13 1 EA CONTROL PANEL

WASTEWATER TREATMENT PLANT SUMMARY OF INSTALLATION QUANTITIES

ITEM NO. QUANTITY UNITS DESCRIPTION

C1 163.5 SY 6" CONCRETE SIDEWALK

C2 140.5 SY 6" CONCRETE DRIVEWAY

C3 29 SY 2" ASPHALT

C4 170 LF 6" CURB AND GUTTER

C5 131 LF SECURITY FENCE

C6 1 EA 20' ACCESS GATE

C7 2 EA INLETS

C8 240 LF 8" SANITARY SEWER MAIN

C9 4 EA 4' MANHOLES

C10 250 LF 4" RAW SEWAGE

C11 176 LF 4" RETURN ACTIVATED SLUDGE LINE

C12 210 LF 4" WASTE ACTIVATED SLUDGE LINE

C13 121 LF 6" SLUDGE LINE

C14 62 LF 8" FILTERED RETURN LINE

C15 193 LF 2" WATER LINE (?)

C16 1 EA POLYMER FEED SYSTEM

C17 1 EA ELECTRICAL BUILDING

WASTEWATER TREATMENT PLANT SUMMARY OF DEMOLITION QUANTITIES

ITEM NO. QUANTITY UNITS DESCRIPTION

A1 29 SY 2" ASPHALT

A2 120 LF SECURITY FENCE

A3 1 EA 20' ACCESS GATE

A4 99 LF 8" SANITARY SEWER MAIN

A5 66 LF 4" RAW SEWAGE LINE

A6 312 LF 8" RAW SEWAGE LINE

A7 31 LF 6" RETURN ACTIVATED SLUDGE LINE

A8 255 LF 6" WASTE ACTIVATED SLUDGE LINE

A9 163 LF 4" SLUDGE LINE

A10 111 LF 6" SLUDGE LINE

A11 125 LF 8" FILTERED RETURN LINE

A12 143 LF 6" DRAIN LINE

A13 33 LF 8" CLARIFIER BYPASS LINE

A14 33 LF 3/4" WATER LINE

A15 86 LF 1" WATER LINE

A16 61 LF 2" WATER LINE

A17 1 EA 24" TREE

A18 3 EA WATER STRUCTURES

A19 1 EA EXISTING HEADWORKS BUILDING

A20 1 EA EXISTING INFLUENT PUMP STATION

A21 1 EA EXISTING FLOW SPLITTER BOX

A22 1 EA EXISTING RECEIVING MANHOLE AND RAS/WAS PUMP STATION NO. 1

A23 1 EA EXISTING RAS/WAS PUMP STATION NO. 2

WASTEWATER TREATMENT PLANT SUMMARY OF REHABILITATION QUANTITIES

ITEM NO. QUANTITY UNITS DESCRIPTION

G1 2 EA FINAL CLARIFIER BRIDGE

G2 1 EA FINAL CLARIFIER NO. 2 (NORTH) SCUM RACK

G3 1 EA FINAL CLARIFIER NO. 2 (NORTH) EFFLUENT BOX

G4 133 SY CHLORINE CONTACT BASIN EPOXY

G5 133 SY CHLORINE CONTACT BASIN GROUT

SITE PUMP STATION SUMMARY OF DEMOLITION QUANTITIES

ITEM NO. QUANTITY UNITS DESCRIPTION

D1 46 LF 8" SANITARY SEWER MAIN

D2 42 LF 6" FORCE MAIN

D3 100 LF UNDERGROUND POWER LINE

D4 1 EA EX PUMP STATION

D5 230 SY GRAVEL

D6 420 SY INSTALL TEMPORARY STAGING SURFACING

SITE PUMP STATION SUMMARY OF INSTALLATION QUANTITIES

ITEM NO. QUANTITY UNITS DESCRIPTION

F1 57 LF 8" SANITARY SEWER MAIN

F2 2 EA 4' MANHOLES

F3 1 EA PRE-CAST LIFT STATION

F4 35 LF 4" FORCE MAIN

F5 22 LF 1" WATER LINE

F6 48 LF 12" RCP

F7 2 EA 12" END SECTION

F8 253 SY GRAVEL SURFACE

WASTEWATER TREATMENT PLANT SUMMARY OF HEADWORKS INSTALLATION QUANTITIES

ITEM NO. QUANTITY UNITS DESCRIPTION

B1 102 CY CONCRETE

B2 8 CY GROUT

B3 1 EA STAIRS

B4 40 LF HANDRAIL

B5 58.5 SY GRATING

B6 4 EA STOP PLATES

B7 204 LF DISCHARGE PIPING

B8 3 EA MAIN PUMP STATION PUMPS

B9 3 EA RAS/WAS PUMP STATION PUMPS

B10 2 EA 6" TELESCOPING VALVES

B11 16 EA 4" PLUG VALVES

B12 6 EA 4" CHECK VALVES

B13 5 EA FLOW METERS

B14 6 EA ACCESS HATCH

B15 2 EA CONTROL PANEL

B16 1 EA JIB CRANE

B17 1 EA FINE SCREEN

B18 1 EA COURSE SCREEN

B19 56 CY AGGREGATE BACKFILL

QUANTITIES NOTES:

1. DISCHARGE PIPING FOR HEADWORKS CALCULATED FROM BOTTOM OF PUMP STATIONS

THROUGH ABOVE GROUND PIPING TO CHANGE IN PIPING TYPE IN UNDERGROUND TRANSITION.

2. DISCHARGE PIPING FOR SITE PUMP STATION CALCULATED FROM BOTTOM OF PUMP STATION

THROUGH ABOVE GROUND PIPING TO CHANGE IN PIPING TYPE IN UNDERGROUND TRANSITION

TO FORCE MAIN.

LIC

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EQUIPMENT SYMBOL

EXPLANATORY NOTATIONS

2-C-100

SHEET DESIGNATION

DISCIPLINE

SHEET NUMBER

EQUIPMENT

NUMBER

EQUIPMENT

DESCRIPTION

VALVES LINE TYPES

CP CP CP

P-OH

P-UG

EMERGENCY STOP

HAND OFF AUTO

LIMIT SWITCH

FLOW METER

PRESSURE GAUGE

PRESSURE SWITCH

SOLENOID

TEMPERATURE

THERMAL RESISTOR

FLOAT SWITCH

PLUG VALVE

CHECK VALVE

AIR RELEASE VALVE

PUMP

HORN (ALARM)

LIGHT (ALARM)

STOP PLATE

GENERATOR

VARIABLE FREQUENCY DRIVE

TELESCOPING VALVE

DUMPSTER

FINE SCREEN

COURSE SCREEN

PROPOSED STRUCTURE

EXISTING STRUCTURE

CAMLOCK CONNECTION

INPUT ANALOG

OUTPUT ANALOG

INPUT DISCRETE

OUTPUT DISCRETE

DIGITAL

EXISTING ANALOG

EXISTING DISCRETE

EXISTING DIGITAL

SIGNAL INDICATION

P&ID SYMBOLS

MATERIALS LEGEND

ABBREVIATIONS

A ALARM

AF AIR FILTER

B BLOWER

BCV BALL CHECK VALVE

BF BLIND FLANGE

BLV BALL VALVE

BS SCREEN

BV BUTTERFLY VALVE

C CONVEYOR

CF CENTRIFUGE

CH CHEMICAL FEED

CL CAMLOCK

CV CHECK VALVE

CY CUBIC FEET

DC DECANT

EC EXPANSION COUPLING

EL ELEVATION

EX EXISTING

F FLANGED PIPE JOINT

FFE FINISH FLOOR ELEVATION

FL FLOWLINE

FM FLOW METER

FS FLOAT SWITCH

GV GATE VALVE

HO HAND/OFF

HOA HAND/OFF/AUTOMATIC

HT HEIGHT

I INLET

KV KNIFE VALVE

LI LEVEL INDICATOR

LF LINEAR FOOT

M MANIFOLD

MH MANHOLE

MJ MECHANICAL JOINT

P PUMP

PE PIPE END

PG PRESSURE GAUGE

PP PROCESS PIPING

PRV PRESSURE RELIEF VALVE

PV PLUG VALVE

R MOTOR

RAS RETURN ACTIVATED SLUDGE

RCP REINFORCED CONCRETE PIPE

RS RAW SEWAGE

S SAMPLER

SA SURFACE AERATOR

SAN SANITARY WASTE MAIN

SG SLIDE GATE

SP STOP PLATE

SS SANITARY SEWER FORCE MAIN

ST SAMPLE TAP

TSS TOTAL SUSPENDED SOLIDS

TV TELESCOPING VALVE

UV ULTRA VIOLET

UVT UV TRANSMISSIVITY

WAS WASTE ACTIVATED SLUDGE

WP WEIR PLATE

CONCRETE

BAR GRATING (LINES IN

DIRECTION OF SPAN)

EARTH OR GRADE

SAND

NON-SHRINK GROUT

AGGREGATE / RIPRAP

XX-X

2-G-001

PLUG VALVE

BACKFLOW PREVENTER

3 WAY VALVE

4 WAY VALVE

BALL VALVE

BACKWATER VALVE

CHLORINE INSTITUTE VALVE

DIAPHRAGM VALVE

FLAME TRAP VALVE

GLOBE VALVE

ANGLE GATE VALVE

THROTTLE VALVE

HOSE FAUCET, OR DRAIN VALVE

W/ VACCUM BREAKER

CHECK VALVE

PLUG VALVE

PRESSURE REDUCING VALVE

PRESSURE RELIEF VALVE

PRESSURE SUBSTAINING VALVE

PRESSURE VACCUM RELIEF VALVE

RELIEF OR SAFETY VALVE

GATE VALVE

VACCUM RELIEF VALVE

THERMAL SHUT OFF VALVE

UNDERGROUND POWER

OVERHEAD POWER

STORM DRAIN CONDUIT

RAW SEWAGE

DCW DCW

D D

SAN SAN

S S

W W W

SS SS SS

RSL RSL RETURN ACTIVATED SLUDGE LINE

DRAIN

SANITARY SEWER - FORCE MAIN

WATER LINE

FENCE 2

FENCE-SECURITY-GENERIC

DOMESTIC WATER - COLD

SANITARY WASTE MAIN

WSL

FRL

WASTE ACTIVATED SLUDGE LINE

DRAIN EFFLUENT LINE

CHLORINE EFFLUENT LINE

FILTERED RETURN LINE

CBL

CLARIFIER BYPASS LINE

FINISHED EFFLUENT LINE

DEMOLITION / ABANDON LINE

DEMOLITION LINE

CONSTRUCTION CONTRACT LIMIT

CL CHLORINE LINE

VOLUME

FIELD CONDITIONS LEGEND

BENCHMARK AND/OR CONTROL POINT ( AS NOTED)

BOLLARD

BOREHOLE

FIRE HYDRANT

GRATE INLET

GUY WIRE

LIGHT POLE

POWER POLE

SANITARY MANHOLE

SIGN

TELEPHONE PEDESTAL

TREE STUMP

COLUMN

ELECTRIC BOX

ELECTRIC MANHOLE

AIR CONDITIONER

ELECTRIC METER

GAS MARKER

GAS METER

GAS VALVE

GAS VAULT

IRRIGATION VALVE

SPOT ELEVATION

MAILBOX

ASPHALT AREA

CONCRETE AREA

GRAVEL AREA

WATER METER

WOOD POST

SANITARY CLEANOUT

STORM MANHOLE

TRAFFIC SIGNAL BOX

TELEPHONE CABINET

TELEPHONE RISER

WATER METER

TELEVISION CABLE BOX

ELECTRICAL CABINET

WATER VALVE

SPRINKLER CONTROL VALVE

ELECTRICAL SWITCH

BORING & SITE CONTROL INFORMATION

ITEM DESCRIPTION NORTHING EASTING ELEVATION

1A SOIL BORING 16584689.77 1365431.05 17.1'

1B SOIL BORING 16583012.11 1366767.76 11.9'

2B SOIL BORING 16583011.88 1366818.20 12.1'

3B SOIL BORING 16582973.28 1366821.20 12.2'

SCP 1 1/2" IRON BAR W/ CAP 16584019.31 1366239.20 14.22'

SCP 2 1/2" IRON BAR W/ CAP 16584635.75 1365535.96 17.34'

SCP 3 1/2" IRON BAR W/ CAP 16584700.94 1365224.28 15.58'

SCP 4 1/2" IRON BAR W/ CAP 16583220.63 1366830.50 15.58'

SCP 5 1/2" IRON BAR W/ CAP 16582949.83 136694.08 13.17'

GEN

VFD

DECIDUOUS TREE

PRESSURE REGULATOR VALVE

DUMPSTER

45° BEND

90° BEND

FLOW DIRECTION

HEADWALL

MULTIFUNCTION VALVE

GATE VALVE

CALIBRATOR COLUMN

METERING PUMP

RATE OF FLOW CONTROLLER

POLYMER MIXING CHAMBER

BACKFLOW PREVENTER

SLUDGE VALVE

MOTOR

GENERAL CONSTRUCTION NOTES:

INTENT

1. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE CURRENT PROJECT SPECIFICATIONS.

2. THE INTENTION OF THE DOCUMENTS IS TO INCLUDE ALL LABOR AND MATERIALS REASONABLY NECESSARY OF THE PROPER EXECUTION AND COMPLETION OF THE WORK AS STIPULATED IN THE

CONTRACT.

3. MINOR DEVIATIONS FROM THE DESIGN LAYOUT MAY OCCUR AND SHALL BE CONSIDERED AS PART OF THE WORK. NO CHANGES THAT ALTER THE INTENT OF THE WORK WILL BE MADE OR PERMITTED BY THE

OWNER WITHOUT APPROVING A CHANGE ORDER.

4. THE EXISTING TREATMENT PLANT, APPARATUS AND OPERATIONS SHALL REMAIN IN FULL OPERATION AT ALL TIMES DURING CONSTRUCTION. CONTRACTOR SHALL INSTALL AND MAINTAIN NECESSARY ACCESS

DRIVES FOR OWNERS USE. CONTRACTOR SHALL ALLOW ACCESS TO EACH SEGMENT OF THE

WASTEWATER TREATMENT PLANT TO OWNER AT ALL TIMES.

CONFLICTS

5. THE CONTRACTOR SHALL BE RESPONSIBLE FOR VERIFICATION OF ALL MEASUREMENTS AT THE SITE PRIOR TO ORDERING ANY MATERIALS OR DOING ANY WORK. NO EXTRA CHARGE OR COMPENSATION SHALL BE ALLOWED DUE TO DIFFERENCE BETWEEN ACTUAL DIMENSIONS AND DIMENSIONS INDICATED ON THE CONSTRUCTION DRAWINGS. ANY SUCH DISCREPANCY IN DIMENSION WHICH MAY BE FOUND SHALL BE SUBMITTED TO THE OWNER FOR CONSIDERATION BEFORE THE CONTRACTOR PROCEEDS WITH

THE WORK IN THE AFFECTED AREAS.

6. NO PLEA OF IGNORANCE OF CONDITIONS THAT EXIST, OR OF DIFFICULTIES OR CONDITIONS THAT EXIST, OR OF DIFFICULTIES OR CONDITIONS THAT MAY BE ENCOUNTERED OR OF ANY OTHER RELEVANT MATTER CONCERNING THE WORK TO BE PERFORMED IN THE EXECUTION OF THE WORK WILL BE ACCEPTED AS AN EXCUSE FOR ANY FAILURE OR OMISSION ON THE PART OF THE CONTRACTOR TO FULFILL EVERY DETAIL

OF ALL THE REQUIREMENTS OF THE CONTRACT DOCUMENTS GOVERNING THE WORK.

FIELD QUALITY CONTROL

7. THE LOCATION OF UNDERGROUND UTILITIES DEPICTED ON THESE DRAWINGS ARE BASED ON VISUAL SURFACE EVIDENCE AND/OR AS-BUILT DRAWINGS PROVIDED BY OTHERS AND, THEREFORE; MAY NOT REPRESENT ALL UTILITIES PRESENT OR THEIR ACTUAL LOCATIONS. IT IS THE CONTRACTOR'S RESPONSIBILITY FOR COORDINATING WITH INDIVIDUAL UTILITY OWNERS TO ASCERTAIN THE EXACT LOCATION OF EXISTING UTILITIES AT SPECIFIC POINTS OF CONNECTION AND FOR NOTIFYING THE CALL

TEXAS 811 CALL SYSTEM PRIOR TO ANY EXCAVATION ON SITE.

8. ALL ELEVATIONS SHOWN ON THE CONSTRUCTION DOCUMENTS ARE BASED UPON NORTH AMERICAN VERTICAL DATUM OF 1988 (NAVD 88), HORIZONTAL DATUM NAD 83, TEXAS STATE PLANE SOUTH - US FOOT, UNLESS OTHERWISE NOTED.

9. THE CONTRACTOR SHALL VERIFY THE FLOW LINE AND TOP OF PIPE ELEVATIONS OF THE EXISTING UTILITIES PRIOR TO LAYING ANY NEW PIPE. ALL CROSSINGS AND TIE-ON LOCATIONS SHALL BE EXCAVATED AHEAD OF CONSTRUCTION TO VERIFY THE FLOW LINE OF EXISTING UTILITIES. CONTRACTOR TO NOTIFY ENGINEER OF DISCREPANCIES BETWEEN FIELD ELEVATIONS/FLOWLINES AND THESE PLANS

PRIOR TO CONSTRUCTION AND STRUCTURE FABRICATION.

10. CONTRACTOR SHALL VERIFY THAT PIPING SHOWN TO BE ABANDONED OR AS ABANDONED PREVIOUSLY IS NO LONGER IN SERVICE. LINES IN SERVICE SHALL BE MAINTAINED UNTIL NO LONGER REQUIRED BY THE

PLANT.

11. ALL EXISTING PIPES THAT ARE TO BE ABANDONED IN PLACE OR REMOVED MAY NOT BE SHOWN. WHERE PIPING IS TO BE ABANDONED AND MUST REMAIN IN SERVICE UNTIL COMPLETION OF OTHER PHASES OF WORK, AND IT CONFLICTS WITH NEW PIPING, TEMPORARILY RELOCATE PIPING AS REQUIRED TO MAINTAIN

SERVICE BY THE PLANT.

12. CONTRACTOR SHALL REROUTE THE EXISTING PIPING IF REQUIRED TO MISS THE PROPOSED STRUCTURES. THE EXISTING PIPE SHALL REMAIN IN SERVICE UNTIL NEW PIPING IS READY TO BE PLACED INTO SERVICE. DOWNTIME SHALL BE A MAXIMUM OF 2 HOURS, UNLESS SPECIFIED, SHOWN, OR

OTHERWISE APPROVED.

ACCESS

13. THE CONTRACTOR SHALL CONTACT THE PORT ISABEL DETENTION CENTER STAFF PRIOR TO ACCESSING THE SITE. PLEASE SEE DIVISION 1 OF THE PROJECT SPECIFICATIONS FOR CONTACT INFORMATION AND

NOTICE REQUIREMENTS.

PERMITTING

14. THE CONTRACTOR SHALL OBTAIN ALL NECESSARY PERMITS TO COMPLETE THE WORK AS SPECIFIED.

CONTRACTOR SHALL RECEIVE COPY OF TEXAS COMMISSION OF ENVIRONMENTAL QUALITY (TCEQ), AND

ANY ADDITIONAL PERMITS REQUIRED BY THE USACE, ICE AND/OR A-E.

15. IT IS EXPECTED THAT LAND DISTURBANCE FOR EACH CONSTRUCTION ACTIVITY WILL BE LESS THAN ONE

(1) ACRE. IF CONSTRUCTION ACTIVITIES RESULT IN LAND DISTURBANCE OF EQUAL TO OR GREATER THAN ONE (1) ACRE A STORM DISCHARGE FROM CONSTRUCTION ACTIVITIES PERMIT (FORM TXR-040000) MUST BE OBTAINED FROM TCEQ. THE CONTRACTOR IS RESPONSIBLE TO SUBMIT ALL FORMS, FEES AND OBTAIN

ALL NECESSARY EARTHWORK PERMITS.

EMERGENCY CONTACTS NUMBERS

16. IN CASE OF AN EMERGENCY, IMMEDIATELY CONTACT LOCAL AUTHORITIES AT:

POLICE

CAMERON COUNTY EMERGENCY MANAGEMENT.........956-547-7000

PUBLIC CONVENIENCES AND SAFETY

17. ALL STORED WORK MATERIALS AND EQUIPMENT SHALL BE PLACED IN A MANNER THAT IT DOES NOT CREATE AN INCONVENIENCE TO THE PUBLIC. STREETS, HIGHWAYS, SIDEWALKS, DRIVEWAYS SHALL

MAINTAIN FREE PASSAGE AT ALL TIMES. THESE STORED MATERIALS SHALL BE SECURE.

PROTECTION OF EXISTING PROPERTY, STRUCTURES, AND UTILITIES

18. THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE PRESERVATION OF AND SHALL USE EVERY PRECAUTION NECESSARY TO PREVENT DAMAGE TO ALL TREES, FENCES, CULVERTS, PAVEMENT, ETC. TO ALL WATER, SEWER, GAS, AND/OR ELECTRIC LINES AND/OR APPURTENANCES THEREOF AND TO ALL

OTHER PUBLIC OR PRIVATE PROPERTY ALONG OR ADJACENT TO THE WORK.

19. THE CONTRACTOR SHALL NOTIFY THE PROPER REPRESENTATIVES OF ANY PUBLIC AND/OR PRIVATE SERVICE CORPORATION, COMPANY, AND/OR INDIVIDUAL NOT LESS THAN THREE (3) BUSINESS DAYS IN

ADVANCE OF ANY WORK WHICH MAY DAMAGE OR INTERFERE WITH THE PREPARATION OF THEIR

PROPERTY ALONG AND/OR ADJACENT TO THE WORK. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL DAMAGE OR INJURY TO PROPERTY OR ANY CHARACTER RESULTING FROM AN ACT, OMISSION, NEGLECT AND/OR MISCONDUCT IN THE MANNER OR METHOD OF EXECUTING THE WORK OR DUE TO

NON-EXECUTION OF THE WORK OR AT ANY TIME DUE TO DEFECTIVE WORK OR MATERIALS.

CONTRACTORS RESPONSIBILITY SHALL NOT BE RELEASED UNTIL THE IMPROVEMENTS HAVE BEEN

COMPLETED AND APPROVED OF BY OWNER.

20. THE CONTRACTOR SHALL PROVIDE NECESSARY SHEETING, SHORING, AND OTHER BRACING AND

SUPPORTS TO PROTECT IMPROVEMENTS ADJACENT TO THE CONSTRUCTION AREA.

21. FENCES, SIGNS, OR OTHER IMPROVEMENTS REQUIRED TO BE DISTURBED OR REMOVED TO PERMIT CONSTRUCTION SHALL BE RESTORED OR REPLACED IN THE SAME LOCATION AND IN A CONDITION AS

GOOD OR BETTER THAN PRIOR TO CONSTRUCTION. NO COMPENSATION SHALL BE GIVEN TO THE

CONTRACTOR FOR REMOVAL AND REPLACEMENT OF FENCES, SIGNS, OR OTHER IMPROVEMENTS ON

PRIVATE PROPERTY. THIS WORK SHALL BE INCLUDED IN OTHER ITEMS OF WORK.

22. THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE CONSTRUCTION STAKING. THE STAKING MUST BE DONE BY A REGISTERED PROFESSIONAL LAND SURVEYOR, IN THE STATE OF TEXAS, WHICH WILL BE

VERIFIED AT THE PRE-WORK CONFERENCE.

23. ANY UTILITY LINES TEMPORARILY TAKEN OUT OF SERVICE FOR MAKING CONNECTIONS AND INSTALLING PLUGS SHALL BE MADE AT LOW DEMAND TIMES. THE CONTRACTOR SHALL PROVIDE SEVEN (7) DAYS

NOTICE TO OWNER PRIOR TO TAKING ANY UTILITY LINE OUT OF SERVICE.

24. WHEN EXISTING SEWERS, DRAINS, OR DITCHES ARE BLOCKED, CUT, OPENED, OR REMOVED IN THE COURSE OF THE WORK, THE CONTRACTOR SHALL PROVIDE AND MAINTAIN TEMPORARY OUTLETS AND CONNECTIONS. CONTRACTOR SHALL PROVIDE FOR DISPOSAL OF ALL SEWAGE OR DRAINAGE UNTIL THE PERMANENT FACILITIES HAVE BEEN RESTORED. THIS MAY INCLUDE MAINTENANCE OF ANY PUMPS, DIVERSION PIPING, CONTAINERS, AND OTHER FACILITIES REQUIRED FOR THIS PURPOSE.

25. THE CONTRACTOR IS RESPONSIBLE FOR PROTECTING ALL EXISTING STRUCTURES, FENCES, AND

LANDSCAPING NOT SHOWN TO BE REMOVED AND SHALL BE RESPONSIBLE FOR THE COST OF ANY

REPAIRS.

26. THE CONTRACTOR SHALL TAKE SPECIAL PRECAUTIONS IN THE VICINITY OF ANY OVERHEAD ELECTRIC LINES. CONTRACTOR SHALL ABIDE BY THE NATIONAL ELECTRIC CODE AND ANY REQUIREMENT BY THE

OWNER OF THE ELECTRIC LINES.

STORM WATER MANAGEMENT

27. EACH SITE IS CONSIDERED TO BE SEPARATE CONSTRUCTION ACTIVITIES AND EARTH DISTURBANCE ACTIVITIES WILL BE LESS THAN ONE (1) ACRE IN SIZE. THE CONTRACTOR SHALL INSTALL EROSION AND SEDIMENT CONTROL DEVICES BASED ON BEST MANAGEMENT PRACTICES TO PREVENT THE FREE RUN OF

STORM WATER AND SILT ONTO ADJACENT AREAS.

28. CONTRACTOR RESPONSIBLE FOR ALL EROSION CONTROL IN ADHERENCE TO FEDERAL, STATE, AND LOCAL STANDARDS. A COPY OF THE EROSION CONTROL SITE PLAN MUST BE ON SITE AT ALL TIMES AND MADE AVAILABLE TO THE INSPECTOR UPON REQUEST. THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE INSPECTION, MAINTENANCE, REPAIR AND/OR REPLACEMENT OF ALL EROSION CONTROL DEVICES.

29. CONTRACTOR SHALL APPLY WATER AND/OR OTHER DUST PALLIATIVES AS NECESSARY TO PREVENT OR

ALLEVIATE DUST.

30. THE CONTRACTOR SHALL KEEP PAVEMENT AREAS FREE OF ANY MUD OR EXCAVATION WASTE FROM

TRUCKS OR OTHER EQUIPMENT.

EXCAVATION AND BACKFILL

31. TRENCHING, BEDDING AND BACKFILL FOR ALL UTILITY LINES SHALL BE IN ACCORDANCE WITH THE

PROJECT SPECIFICATIONS.

32. EXCAVATED AND TRENCHING WORK SHALL INCLUDE REMOVAL AND SUBSEQUENT HANDLING OF ALL

MATERIALS EXCAVATED OR OTHERWISE REMOVED IN PERFORMANCE OF THE CONTRACT WORK,

REGARDLESS OF THE TYPE, CHARACTER, COMPOSITION OR CONDITIONS THEREOF.

33. EXCAVATION WORK SHALL BE PERFORMED IN A SAFE AND PROPER MANNER WITH SUITABLE

PRECAUTIONS BEING TAKEN AGAINST ALL HAZARDS. EXCAVATIONS SHALL PROVIDE ADEQUATE WORKING

SPACE AND CLEARANCES FOR THE WORK TO BE PREFORMED.

34. EXCAVATED MATERIAL REQUIRED TO BE USED FOR BACKFILL MAY BE DEPOSITED BY THE CONTRACTOR

IN STORAGE PILES AT POINTS CONVENIENT FOR REHANDLING OF THE MATERIAL DURING THE

BACKFILLING OPERATIONS. THE LOCATION OF STORAGE PILES SHALL, HOWEVER, BE SUBJECT TO THE

APPROVAL OF THE ENGINEER AND/OR OWNER.

35. THE EXISTING TOPSOIL AT ALL AREAS WHICH IS TO BE DISTURBED DURING CONSTRUCTION SHALL BE STRIPPED AND STOCKPILED ONSITE PRIOR TO EXCAVATION. THE STOCKPILE SHALL BE LOCATED IN A

AREA TO NOT RESTRICT SURFACE FLOWS AND REDUCE SEDIMENT RUNOFF FROM THE SITE.

INSTALLATION OF SEDIMENT CONTROL DEVICES WILL BE NECESSARY. THE STOCKPILED TOPSOIL SHALL

BE SPREAD OVER ALL AREAS WHICH ARE SCHEDULED TO BE SEEDED OR.

36. THE CONTRACTOR SHALL PROVIDE ADEQUATE SHEETING AND BRACING OF EXCAVATION WORK OR USE

OF A TRENCH BOX IN ORDER TO PROVIDE FOR THE SAFETY OF WORKMAN, AS WELL AS

REPRESENTATIVES OF THE OWNER.

37. COMPLIANCE TO "TRENCH SAFETY ACT" IS REQUIRED FOR ALL EXCAVATIONS IN EXCESS OF 5 FEET DEEP.

CONTRACTOR SHALL COMPLY WITH THE U. S. DEPARTMENT OF LABOR OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATIONS STANDARDS OSHA 29 CFR 1910.146, 'PERMIT-REQUIRED CONFINED SPACES' AND OSHA 29 CFR 1926, 'SAFETY AND HEALTH REGULATIONS FOR CONSTRUCTION'. ALL EXCAVATIONS AND SHORING AND SHIELDING SHALL BE DESIGNED BY A STATE OF TEXAS REGISTERED PROFESSIONAL

ENGINEER.

38. COMPLIANCE WITH USACE SAFETY MANUAL EM 385-1-1 SHALL BE MAINTAINED.

39. IF THE CONTRACTOR OVER CUTS A TRENCH, THE ADDITIONAL BEDDING AND BACKFILL MATERIAL

REQUIRED WILL BE AT THE CONTRACTOR'S EXPENSE. COMPACTION REQUIREMENTS REFERENCED

WITHIN THE SPECIFICATIONS SHALL BE MET.

40. TRENCH EXCAVATION MAY REQUIRE DEWATERING. THE CONTRACTOR SHALL AT ALL TIMES DEWATER THE GROUND SUFFICIENTLY TO KEEP THE GROUNDWATER ELEVATION A MINIMUM OF 6" BELOW THE

STRUCTURE. A WORK PLAN FOR DEWATERING SHALL BE SUBMITTED TO OWNER FOR REVIEW AND

APPROVAL.

41. SPOILS MATERIAL MAY BE DISPOSED OF BY THE CONTRACTOR ON-SITE AT A LOCATION CONFIRMED BY CONTRACTING OFFICER'S REPRESENTATIVE (COR). UPON COMPLETION OF THE PROJECT, THE SPOILS

AREA SHALL BE GRADED SMOOTH AS NOT TO OBSTRUCT THE DRAINAGE AND SEEDED TO MATCH

SURROUNDING AREA. THE CONTRACTOR SHALL EXERCISE PROPER PRECAUTIONS WHEN DISPOSING OF

THE EXCAVATED MATERIAL.

PAVING

42. ALL P.C. CONCRETE PAVEMENT, CURBS, DRIVEWAYS AND SIDEWALKS DISTURBED BY THIS PROJECT

SHALL BE REPLACED WITH HIGH EARLY STRENGTH (HES) CONCRETE, 4,000 PSI MIN.

43. ALL NEW PAVING SHALL BE DOWELED INTO EXISTING PAVEMENT PER PROJECT SPECIFICATIONS.

44. ALL PAVING AREAS SHALL BE STRIPPED OF VEGETATION, TOPSOIL, AND SOFT OR OTHERWISE

UNSUITABLE MATERIAL. FOLLOWING SITE STRIPPING, THE EXPOSED SUBGRADE SHALL BE

PROOF-ROLLED WITH A FULLY LOADED TANDEM AXLE DUMP TRUCK.

45. BEFORE FINAL COMPLETION OF THIS WORK, ALL ROADWAYS, SLOPES, DITCHES, AND BERMS SHALL BE

RESTORED TO THEIR ORIGINAL CONDITION.

TRAFFIC CONTROL

46. ALL BARRICADES, WARNING SIGNS, LIGHTS, TRAFFIC CALMING DEVICES, ETC., FOR THE GUIDANCE AND PROTECTION OF TRAFFIC AND PEDESTRIANS SHALL CONFORM TO THE LATEST REVISION OF THE MANUAL

ON UNIFORM TRAFFIC CONTROL DEVICES (MUTCD).

FINAL CLEANUP

47. TO THE MAXIMUM EXTENT POSSIBLE, EXCESS EARTH OBTAINED FROM STRUCTURE AND TRENCH EXCAVATIONS SHALL BE USED FOR LEVELING AND GRADING IN AREAS DESIGNATED ON THE PLANS.

48. EXISTING TOPSOIL SHALL BE REMOVED AND STOCKPILED DURING CONSTRUCTION OPERATIONS.

STOCKPILES SHALL BE LOCATED SO AS NOT TO INTERFERE WITH AREA DRAINAGE.

49. ALL DISTURBED AREAS DURING THE COURSE OF CONSTRUCTION SHALL BE LEVELED WITH TOPSOIL (4"

MINIMUM) AND SEEDDED ACCORDING TO THE PROJECT SPECIFICATIONS.

50. AFTER COMPLETION OF THE FINISHED WORK, THE CONTRACTOR SHALL REMOVE ALL EXCESS MATERIAL AND SHALL GRADE THE AREA AS REQUIRED. THE FINAL GRADE SHALL BE DRESSED TO SMOOTH, EVEN

CONTOURS TO PROVIDE SATISFACTORY DRAINAGE.

51. UPON COMPLETION OF THE WORK, AND BEFORE ACCEPTANCE AND FINAL PAYMENT WILL BE MADE, THE

CONTRACTOR SHALL CLEAN AND REMOVE DEBRIS, FROM THE SITE OF WORK.

52. ALL REMOVED PAVEMENT SHALL BE SAWCUT.

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GENERAL CONSTRUCTION NOTES:

SANITARY SEWER

1. CONTRACTOR SHALL MAKE CONNECTIONS TO EXISTING PIPE, EQUIPMENT, ETC. AS REQUIRED AND SHALL PROVIDE ALL FITTINGS, ADAPTERS, AND APPURTENANCES REQUIRED TO MAKE THE CONNECTIONS.

PROVIDE ALL SUPPORTS REQUIRED FOR A RIGIDLY SUPPORTED COMPLETE AND WORKING SYSTEM.

2. ALL WORK SHALL BE DONE IN A NEAT AND ORDERLY FASHION BY SKILLED WORKERS. ALL WORK WILL

REQUIRE INSPECTION TO INSURE ACCEPTABLE CONSTRUCTION

3. THE CONTRACTOR IS RESPONSIBLE FOR MAINTAINING SEWAGE FLOW IN THE EXISTING LINE BY PUMPING

OR OTHER MEANS DURING CONSTRUCTION.

4. COMPACTION OF TRENCH BACKFILL IN PAVED AREAS SHALL BE 95% STANDARD PROCTOR DENSITY.

5. THE CONTRACTOR SHALL AT ALL TIMES, DURING PIPE LAYING, DEWATER THE GROUND SUFFICIENTLY TO KEEP THE GROUNDWATER ELEVATION A MINIMUM OF 6" BELOW THE PIPE BEING LAID WITHIN THE AREA OF THE TRENCH. A SEPARATE WORK PLAN FOR DEWATERING SHALL BE SUBMITTED TO OWNER FOR

REVIEW AND APPROVAL.

6. ALL PIPES SHALL BE LAID ON A FIRM FOUNDATION. SOFT OR SPONGY BEDDING FOR PIPES WILL NOT BE ACCEPTED. ANY UNSUITABLE MATERIAL SHALL BE REMOVED AND REPLACED WITH A DRY, COMPACTED, GRANULAR MATERIAL SATISFACTORY TO THE OWNER.

7. ALL UNSUITABLE MATERIAL DISCOVERED DURING EXCAVATION SHALL BE REMOVED UPON APPROVAL FROM THE ENGINEER OR INSPECTOR. ALL UNSTABLE MATERIAL REMOVED SHALL BE REPLACED WITH

SUITABLE FILL MATERIAL AND COMPACTED TO 95% STANDARD PROCTOR DENSITY.

8. MANHOLES TO BE CONSTRUCTED WITHIN THE 100-YEAR FLOOD ZONE SHALL HAVE A SEALED LID AT THE

LOCATIONS INDICATED ON THE DRAWINGS.

9. MANHOLE CONSTRUCTION OVER EXISTING SANITARY SEWER MAINS MAY BE DOGHOUSE OR OTHER

ACCEPTABLE METHODS.

10. DROP MANHOLES SHALL BE INSTALLED FOR SEWER PIPES ENTERING A MANHOLE AT 24" OR MORE ABOVE

THE MANHOLE INVERT.

11. ADJUST ALL VALVE BOXES, VAULTS, PULL BOXES, AND MANHOLES TO FINISHED GRADE UNLESS OTHER-WISE SHOWN OR DIRECTED. MANHOLES IN OPEN FIELDS SHALL BE SET TWELVE INCHES ABOVE

FINISHED GRADE AND VAULTS SHALL BE SIX INCHES ABOVE FINISHED GRADE.

12. ALL SANITARY SEWER PRESSURE PIPE (FORCE MAINS) SHALL BE RESTRAINED MECHANICAL JOINT OF

FLANGED CONNECTIONS.

13. SANITARY SEWER PVC PIPE IS ONLY AN ACCEPTABLE MATERIAL FOR BURIED APPLICATIONS.

14. CONTRACTOR SHALL PROVIDE WHATEVER MEANS NECESSARY TO MAINTAIN PROVIDE RESTRAINED

FLEXIBLE CONNECTIONS FOR ALL PIPING AT POINTS OF CONNECTION TO STRUCTURES AND

ENCASEMENTS.

15. ALL SANITARY SEWER LINES WHICH ARE CONSTRUCTED AS NEW LINES SHALL BE TESTED FOR LEAKAGE

IN ACCORDANCE WITH TCEQ AND PROJECT SPECIFICATIONS.

WATER

16. ALL WATER MAINS AND SERVICE LINES SHALL MAINTAIN A MINIMUM COVER OF 30 INCHES.

17. THIS WATER DISTRIBUTION SYSTEM MUST BE CONSTRUCTED IN ACCORDANCE WITH THE CURRENT TEXAS COMMISSION ON ENVIRONMENTAL QUALITY (TCEQ) RULES AND REGULATIONS FOR PUBLIC WATER SYSTEMS. WHEN CONFLICTS ARE NOTED WITH PROJECT SPECIFICATIONS, THE MORE STRINGENT

REQUIREMENT SHALL BE APPLIED.

18. NO PIPE WHICH HAS BEEN USED FOR ANY PURPOSE OTHER THAN THE CONVEYANCE OF DRINKING WATER SHALL BE ACCEPTED OR RELOCATED FOR USE IN ANY PUBLIC DRINKING WATER SUPPLY.

19. ALL WATER LINE CROSSINGS OF WASTEWATER MAINS SHALL BE PERPENDICULAR.

20. THE TOP OF THE WATER LINE MUST BE LOCATED BELOW THE FROST LINE AND IN NO CASE SHALL THE

TOP OF THE WATER LINE BE LESS THAN 24 INCHES BELOW GROUND SURFACE.

21. THE MAXIMUM ALLOWABLE LEAD CONTENT OF PIPES, PIPE FITTINGS, PLUMBING FITTINGS, AND FIXTURES

IS 0.25 PERCENT.

22. THE CONTRACTOR SHALL NOT PLACE THE PIPE IN WATER OR WHERE IT CAN BE FLOODED WITH WATER

OR SEWAGE DURING ITS STORAGE OR INSTALLATION [§290.44(F)(1)].

23. HYDROSTATIC LEAKAGE TESTING SHALL BE PREFORMED FOR ALL WATER PIPE. THE HYDROSTATIC

LEAKAGE RATE SHALL NO EXCEED THE MOST RECENT AWWA FORMULAS.

24. THE CONTRACTOR SHALL DISINFECT THE NEW WATERLINES IN ACCORDANCE WITH AWWA STANDARD C-651-14 OR MOST RECENT, THEN FLUSH AND SAMPLE THE LINES BEFORE BEING PLACED INTO SERVICE.

25. DECHLORINATION OF DISINFECTING WATER SHALL BE IN STRICT ACCORDANCE WITH CURRENT AWWA

STANDARD C655-09 OR MOST RECENT.

CONSTRUCTION SEQUENCING

SITE PUMP STATION

1. INSTALL NECESSARY EROSION AND SEDIMENT CONTROL MEASURES AND

2. FIELD VERIFY UTILITIES.

3. CLEAR AND GRUB AS NECESSARY.

4. INSTALL SITE PUMP STATION.

5. INSTALL SANITARY SEWER IMPROVEMENTS.

6. INSTALL WATER IMPROVEMENTS.

7. PREPARE SITE PUMP STATION FOR COMMISSIONING.

8. TIE-IN EXISTING SANITARY SEWER MAIN CONNECTIONS.

9. ABANDON SANITARY SEWER MAINS AS SPECIFIED.

10. ABANDON EXISTING SITE PUMP STATION.

11. CONDUCT FINAL GRADING ACTIVITIES.

12. INSTALL STORM SEWER CONDUIT AND END SECTIONS.

13. INSTALL FINAL SURFACE AGGREGATE.

14. CONDUCT FINAL DRESSING AND CLEANING OF SITE.

15. CLEAN SITE FROM DEBRIS.

16. REMOVES EROSION AND SEDIMENT CONTROL MEASURES.

WASTEWATER TREATMENT PLANT

1. INSTALL NECESSARY EROSION AND SEDIMENT CONTROL MEASURES AND

2. FIELD VERIFY UTILITIES.

3. CLEAR AND GRUB AS NECESSARY.

4. SHUT DOWN SOUTH PLANT.

4.1. ALL WASTEWATER FLOWS WILL BE DELIVERED TO THE NORTH STRUCTURES.

5. INSTALL HEADWORKS STRUCTURE.

6. INSTALL SANITARY SEWER IMPROVEMENTS.

7. INSTALL WATER IMPROVEMENTS.

8. PREPARE HEADWORKS STRUCTURE FOR COMMISSIONING.

9. TIE-IN EXISTING SANITARY SEWER MAIN CONNECTIONS.

10. ABANDON SANITARY SEWER MAINS AS SPECIFIED.

11. ABANDON EXISTING SOUTH WASTEWATER STRUCTURES STATION.

12. CONDUCT FINAL GRADING ACTIVITIES.

13. CONDUCT FINAL DRESSING AND CLEANING OF SITE.

14. CLEAN SITE FROM DEBRIS.

15. REMOVES EROSION AND SEDIMENT CONTROL MEASURES.

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LIFT STATION TCEQ INFORMATION:

1. THIS LIFT STATION AND/OR FORCE MAIN MUST BE DESIGNED AND CONSTRUCTED IN ACCORDANCE WITH

THE TEXAS COMMISSION ON ENVIRONMENTAL QUALITY'S (TCEQ) EDWARDS AQUIFER RULES 30 TEXAS ADMINISTRATIVE CODE (TAC) §213.5(C), THE DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS 30

TAC CHAPTER 217, AND THE UNITED FACILITIES GUIDE SPECIFICATIONS (UFGS).

2. ANY MODIFICATION TO THE ACTIVITIES DESCRIBED IN THE REFERENCED LIFT STATION/FORCE MAIN SYSTEM APPLICATION FOLLOWING THE DATE OF APPROVAL MAY REQUIRE THE SUBMITTAL OF A LIFT STATION/FORCE MAIN SYSTEM APPLICATION TO MODIFY THIS APPROVAL, INCLUDING THE PAYMENT OF

APPROPRIATE FEES AND ALL INFORMATION NECESSARY FOR ITS REVIEW AND APPROVAL.

3. PRIOR TO COMMENCING ANY REGULATED ACTIVITY, THE APPLICANT OR HIS AGENT MUST NOTIFY THE HARLINGEN REGIONAL OFFICE (REGION 15), IN WRITING, OF THE DATE ON WHICH THE REGULATED

ACTIVITY WILL BEGIN.

4. UPON COMPLETION OF THE WET WELL EXCAVATION, A GEOLOGIST MUST CERTIFY THAT THE EXCAVATION HAS BEEN INSPECTED FOR THE PRESENCE OF SENSITIVE FEATURES AND THE CERTIFICATION MUST BE SUBMITTED TO THE APPROPRIATE REGIONAL OFFICE. FURTHER ACTIVITIES MAY NOT PROCEED UNTIL THE EXECUTIVE DIRECTOR HAS REVIEWED AND APPROVED THE METHODS PROPOSED TO PROTECT ANY SENSITIVE FEATURE AND THE EDWARDS AQUIFER FROM POTENTIALLY ADVERSE IMPACTS TO WATER QUALITY FROM THE LIFT STATION. CONSTRUCTION MAY CONTINUE IF THE GEOLOGIST CERTIFIES THAT

NO SENSITIVE FEATURE OR FEATURES ARE PRESENT.

5. IF ANY SENSITIVE FEATURES ARE DISCOVERED DURING THE WASTEWATER LINE TRENCHING ACTIVITIES, ALL REGULATED ACTIVITIES NEAR THE SENSITIVE FEATURE MUST BE SUSPENDED IMMEDIATELY. THE APPLICANT MUST IMMEDIATELY NOTIFY THE APPROPRIATE REGIONAL OFFICE OF THE TEXAS COMMISSION ON ENVIRONMENTAL QUALITY OF THE FEATURE DISCOVERY. A GEOLOGIST'S ASSESSMENT OF THE LOCATION AND EXTENT OF THE FEATURE DISCOVERED MUST BE REPORTED TO THAT REGIONAL OFFICE IN WRITING WITHIN TWO WORKING DAYS. THE APPLICANT MUST SUBMIT A PLAN FOR ENSURING THE STRUCTURAL INTEGRITY OF THE SEWER LINE OR FOR MODIFYING THE PROPOSED COLLECTION SYSTEM ALIGNMENT AROUND THE FEATURE. THE REGULATED ACTIVITIES NEAR THE SENSITIVE FEATURE MAY

NOT PROCEED UNTIL THE EXECUTIVE DIRECTOR HAS REVIEWED AND APPROVED THE METHODS

PROPOSED TO PROTECT THE SENSITIVE FEATURE AND THE GULF COAST AQUIFER FROM ANY

POTENTIALLY ADVERSE IMPACTS TO WATER QUALITY WHILE MAINTAINING THE STRUCTURAL INTEGRITY

OF THE LINE.

6. LIFT STATIONS SHALL BE DESIGNED TO WITHSTAND AND OPERATE DURING A 100-YEAR FLOOD EVENT

AND SHALL BE ACCESSIBLE DURING A 25-YEAR FLOOD. ALL LIFT STATIONS SHALL BE

INTRUDER-RESISTANT WITH A CONTROLLED ACCESS.

7. PUMP CONTROLS.

7.1. A LIFT STATION PUMP MUST OPERATE AUTOMATICALLY, BASED ON THE WATER LEVEL IN A WET WELL.

7.2. THE LOCATION OF A WET WELL LEVEL MECHANISM MUST ENSURE THAT THE MECHANISM IS

UNAFFECTED BY CURRENTS, RAGS, GREASE, OR OTHER FLOATING MATERIALS.

7.3. A LEVEL MECHANISM MUST BE ACCESSIBLE WITHOUT ENTERING THE WET WELL.

7.4. WET WELL CONTROLS WITH A BUBBLER SYSTEM REQUIRE DUAL AIR SUPPLY AND DUAL CONTROLS.

7.5. MOTOR CONTROL CENTERS MUST BE MOUNTED AT LEAST 4.0 INCHES ABOVE GRADE TO PREVENT

WATER INTRUSION AND CORROSION FROM STANDING WATER IN THE ENCLOSURE.

7.6. ELECTRICAL EQUIPMENT AND ELECTRICAL CONNECTIONS IN A WET WELL OR A DRY WELL MUST MEET

NATIONAL FIRE PREVENTION ASSOCIATION 70 NATIONAL ELECTRIC CODE EXPLOSION PREVENTION

REQUIREMENTS, UNLESS CONTINUOUS VENTILATION IS PROVIDED.

8. WET WELLS.

8.1. A WET WELL MUST BE ENCLOSED BY WATERTIGHT AND GAS TIGHT WALLS.

8.2. A PENETRATION THROUGH A WALL OF A WET WELL MUST BE GAS TIGHT.

8.3. A WET WELL MUST NOT CONTAIN EQUIPMENT REQUIRING REGULAR OR ROUTINE INSPECTION OR

MAINTENANCE, UNLESS INSPECTION AND MAINTENANCE CAN BE DONE WITHOUT STAFF ENTERING

THE WET WELL.

8.4. A GRAVITY PIPE DISCHARGING TO A WET WELL MUST BE LOCATED SO THAT THE INVERT ELEVATION IS

ABOVE THE LIQUID LEVEL OF A PUMP'S "ON" SETTING.

8.5. GATE VALVES AND CHECK VALVES ARE PROHIBITED IN A WET WELL.

8.6. GATE VALVES AND CHECK VALVES MAY BE LOCATED IN A VALVE VAULT NEXT TO A WET WELL OR IN A

DRY WELL.

8.7. PUMP CYCLE TIME, BASED ON PEAK FLOW, MUST EQUAL OR EXCEED THOSE IN THE FOLLOWING

TABLE:

8.8. PUMP HORSEPOWER MINIMUM CYCLE TIMES (MINUTES) < 50 6 50-100 10 > 100 15

8.9. AN EVALUATION OF MINIMUM WET WELL VOLUME REQUIRES THE FOLLOWING FORMULA:

V = T * Q / 4 * 7.48

WHERE:

V = ACTIVE VOLUME (CUBIC FEET)

Q = PUMP CAPACITY (GALLONS PER MINUTE)

T = CYCLE TIME (MINUTES)

7.48 = CONVERSION FACTOR (GALLONS/CUBIC FOOT)

9. WET WELL SLOPES.

9.1. A WET WELL FLOOR MUST HAVE A SMOOTH FINISH AND MINIMUM SLOPE OF 10% TO A PUMP INTAKE.

9.2. A WET WELL DESIGN MUST PREVENT DEPOSITION OF SOLIDS UNDER NORMAL OPERATING

CONDITIONS.

9.3. A LIFT STATION WITH GREATER THAN 5.0 MILLION GALLONS PER DAY FIRM PUMPING CAPACITY MUST

HAVE ANTI-VORTEX BAFFLING.

10. VENTILATION SHALL BE PROVIDED FOR LIFT STATIONS, INCLUDING BOTH WET AND DRY WELLS.

11. HOISTING EQUIPMENT. A LIFT STATION MUST HAVE PERMANENT HOISTING EQUIPMENT OR BE ACCESSIBLE TO PORTABLE HOISTING EQUIPMENT FOR REMOVAL OF PUMPS, MOTORS, VALVES, PIPES, AND OTHER SIMILAR EQUIPMENT.

12. PUMPS.

12.1. GENERAL REQUIREMENTS. A RAW WASTEWATER PUMP, WITH THE EXCEPTION OF A GRINDER PUMP, MUST:

12.1.1. BE DESIGNED TO PREVENT CLOGGING;

12.1.2. BE CAPABLE OF PASSING A SPHERE OF 2.5 INCHES IN DIAMETER OR GREATER;

12.1.3. HAVE GREATER THAN 3.0 INCH DIAMETER SUCTION AND DISCHARGE OPENINGS.

12.2. SUBMERSIBLE AND NON-SUBMERSIBLE PUMPS.

12.2.1. A NON-SUBMERSIBLE PUMP MUST HAVE INSPECTION AND CLEANOUT PLATES ON BOTH THE

SUCTION AND DISCHARGE SIDES OF EACH PUMPING UNIT THAT FACILITATE LOCATING AND

REMOVING BLOCKAGE-CAUSING MATERIALS, UNLESS THE PUMP DESIGN ACCOMMODATES EASY

REMOVAL OF THE ROTATION ELEMENTS.

12.2.2. A PUMP SUPPORT MUST PREVENT MOVEMENT AND VIBRATION DURING OPERATION.

12.2.3. A SUBMERSIBLE PUMP MUST USE A RAIL-TYPE PUMP SUPPORT SYSTEM WITH

MANUFACTURER-APPROVED MECHANISMS DESIGNED TO ALLOW PERSONNEL TO REMOVE AND

REPLACE ANY SINGLE PUMP WITHOUT ENTERING OR DEWATERING THE WET WELL.

12.2.4. SUBMERSIBLE PUMP RAILS AND LIFTING CHAINS MUST BE CONSTRUCTED OF A MATERIAL THAT

PERFORMS TO AT LEAST THE STANDARD OF SERIES 300 STAINLESS STEEL.

12.3. LIFT STATION PUMPING CAPACITY. THE FIRM PUMPING CAPACITY OF A LIFT STATION MUST HANDLE

THE EXPECTED PEAK FLOW.

12.4. PUMP HEAD CALCULATIONS.

12.4.1. AN OWNER SHALL SELECT A PUMP BASED UPON ANALYSIS OF THE SYSTEM HEAD AND PUMP

CAPACITY CURVES THAT DETERMINE THE PUMPING CAPACITIES ALONE AND WITH OTHER PUMPS

AS THE TOTAL DYNAMIC-HEAD INCREASES DUE TO ADDITIONAL FLOWS PUMPED THROUGH A

FORCE MAIN.

12.4.2. THE PIPE HEAD LOSS CALCULATIONS, USING THE HYDRAULIC INSTITUTE STANDARDS, PERTAINING TO HEAD LOSSES THROUGH PIPES, VALVES, AND FITTINGS, MUST BE INCLUDED IN

THE REPORT.

12.4.3. THE SELECTED FRICTION COEFFICIENT (HAZEN-WILLIAMS "C" VALUE) USED IN FRICTION HEAD

LOSS CALCULATIONS MUST BE BASED ON THE PIPE MATERIAL SELECTED.

12.4.4. FOR A LIFT STATION WITH MORE THAN TWO PUMPS, A FORCE MAIN IN EXCESS OF ONE-HALF MILE, OR FIRM PUMPING CAPACITY OF 100 GALLONS PER MINUTE OR GREATER, SYSTEM CURVES MUST

BE PROVIDED FOR BOTH THE NORMAL AND PEAK OPERATING CONDITIONS AT C VALUES FOR

PROPOSED AND EXISTING PIPE.

13. FLOW CONTROL.

13.0.1. A LIFT STATION OR A TRANSFER PUMPING STATION LOCATED AT OR DISCHARGING DIRECTLY TO

A WASTEWATER TREATMENT SYSTEM MUST HAVE A PEAK PUMP CAPACITY EQUAL TO OR LESS

THAN THE PEAK DESIGN FLOW, UNLESS EQUALIZATION IS PROVIDED.

13.0.2. A WASTEWATER TREATMENT SYSTEM WITH A PEAK FLOW THAT IS GREATER THAN 300,000

GALLON PER DAY MUST USE THREE OR MORE PUMPS, UNLESS DUPLEX, AUTOMATICALLY

CONTROLLED, VARIABLE CAPACITY PUMPS ARE PROVIDED.

13.1. VERTICAL POSITIONING OF PUMPS. A RAW WASTEWATER PUMP MUST HAVE POSITIVE STATIC

SUCTION HEAD DURING NORMAL ON-OFF CYCLING, EXCEPT A SUBMERSIBLE PUMP WITH "NO

SUCTION" PIPES, A VACUUM-PRIMED PUMP, OR A SELF-PRIMING UNIT CAPABLE OF SATISFACTORY

OPERATION UNDER ANY NEGATIVE SUCTION HEAD ANTICIPATED FOR THE LIFT STATION.

13.2. INDIVIDUAL GRINDER PUMPS. A GRINDER PUMP SERVING ONLY ONE RESIDENTIAL OR COMMERCIAL STRUCTURE THAT IS PRIVATELY OWNED, MAINTAINED, AND OPERATED IS NOT SUBJECT TO THE

RULES OF THIS CHAPTER.

13.3. PUMP FOR LOW-FLOW LIFT STATION. A PUMP USED FOR A LIFT STATION WITH A PEAK FLOW OF LESS

THAN 120 GALLONS PER MINUTE MUST BE SUBMERSIBLE AND INCLUDE A GRINDER.

14. PIPING.

14.1. HORIZONTAL PUMP SUCTIONS.

14.1.1. EACH PUMP MUST HAVE A SEPARATE SUCTION PIPE THAT USES AN ECCENTRIC REDUCER.

14.1.2. PIPES IN A WET WELL MUST HAVE A TURNDOWN TYPE FLARED INTAKE.

14.2. VALVES.

14.2.1. THE DISCHARGE SIDE OF EACH PUMP FOLLOWED BY A FULL-CLOSING ISOLATION VALVE MUST

ALSO HAVE A CHECK VALVE.

14.2.1.1. A CHECK VALVE MUST BE A SWING TYPE VALVE WITH AN EXTERNAL LEVER.

14.2.1.2. A VALVE MUST INCLUDE A POSITION INDICATOR TO SHOW ITS OPEN AND CLOSED POSITIONS, UNLESS A FULL-CLOSING VALVE IS A RISING-STEM GATE VALVE.

14.2.2. A GRINDER PUMP INSTALLATION MAY USE A RUBBER-BALL CHECK VALVE OR A SWING-TYPE

CHECK VALVE.

14.2.3. A BUTTERFLY VALVE, TILTING-DISC CHECK VALVE, OR ANY OTHER VALVE USING A TILTING-DISC IN

A FLOW PIPE IS PROHIBITED.

14.3. PIPES.

14.3.1. A LIFT STATION PIPE MUST HAVE FLANGED OR FLEXIBLE CONNECTIONS TO ALLOW FOR REMOVAL

OF PUMPS AND VALVES WITHOUT INTERRUPTION OF THE LIFT STATION OPERATIONS.

14.3.2. WALL PENETRATIONS MUST ALLOW FOR PIPE FLEXURE WHILE EXCLUDING EXFILTRATION OR

INFILTRATION.

14.3.3. PIPE SUCTION VELOCITIES MUST BE AT LEAST 3.0 FEET PER SECOND BUT NOT MORE THAN 7.0

FEET PER SECOND.

15. EMERGENCY PROVISIONS FOR LIFT STATIONS.

15.1. A COLLECTION SYSTEM LIFT STATION MUST BE EQUIPPED WITH A TESTED QUICK-CONNECT

MECHANISM OR A TRANSFER SWITCH PROPERLY SIZED TO CONNECT TO A PORTABLE GENERATOR, IF

NOT EQUIPPED WITH AN ONSITE GENERATOR.

15.2. LIFT STATIONS MUST INCLUDE AN AUDIOVISUAL ALARM SYSTEM AND THE SYSTEM MUST TRANSMIT ALL ALARM CONDITIONS THROUGH USE OF AN AUTO-DIALER SYSTEM, SUPERVISORY CONTROL AND

DATA ACQUISITION SYSTEM, OR TELEMETERING SYSTEM CONNECTED TO A CONTINUOUSLY

MONITORED LOCATION.

15.3. AN ALARM SYSTEM MUST SELF-ACTIVATE FOR A POWER OUTAGE, PUMP FAILURE, OR A HIGH WET

WELL WATER LEVEL.

15.4. A LIFT STATION CONSTRUCTED TO PUMP RAW WASTEWATER MUST HAVE SERVICE RELIABILITY

BASED ON:

15.4.1. RETENTION CAPACITY.

15.4.1.1. THE RETENTION CAPACITY IN A LIFT STATION'S WET WELL AND INCOMING GRAVITY PIPES

MUST PREVENT DISCHARGES OF UNTREATED WASTEWATER AT THE LIFT STATION OR ANY

POINT UPSTREAM FOR A PERIOD OF TIME EQUAL TO THE LONGEST ELECTRICAL OUTAGE

RECORDED DURING THE PAST 24 MONTHS, BUT NOT LESS THAN 20 MINUTES

15.4.1.2. FOR CALCULATION PURPOSES, THE OUTAGE PERIOD BEGINS WHEN A LIFT STATION PUMP

FINISHED ITS LAST NORMAL CYCLE, EXCLUDING A STANDBY PUMP.

15.4.2. ON-SITE GENERATORS. A LIFT STATION MAY BE PROVIDED EMERGENCY POWER BY ON-SITE, AUTOMATIC ELECTRICAL GENERATORS SIZED TO OPERATE THE LIFT STATION AT ITS FIRM

PUMPING CAPACITY OR AT THE AVERAGE DAILY FLOW, IF THE PEAK FLOW CAN BE STORED IN

THE COLLECTION SYSTEM.

15.4.3. PORTABLE GENERATORS AND PUMPS.

15.4.3.1. A LIFT STATION MAY USE PORTABLE GENERATORS AND PUMPS TO GUARANTEE SERVICE IF

THE REPORT INCLUDES:

15.4.3.1.1. THE STORAGE LOCATION OF EACH GENERATOR AND PUMP;

15.4.3.1.2. THE AMOUNT OF TIME THAT WILL BE NEEDED TO TRANSPORT EACH GENERATOR OR

PUMP TO A LIFT STATION;

15.4.3.1.3. THE NUMBER OF LIFT STATIONS FOR WHICH EACH GENERATOR OR PUMP IS DEDICATED

AS A BACKUP; AND

15.4.3.1.4. THE TYPE OF ROUTINE MAINTENANCE AND UPKEEP PLANNED FOR EACH PORTABLE

GENERATOR AND PUMP TO ENSURE THAT THEY WILL BE OPERATIONAL WHEN NEEDED.

15.4.3.2. AN OPERATOR THAT IS KNOWLEDGEABLE IN OPERATION OF THE PORTABLE GENERATORS

AND PUMPS SHALL BE ON CALL 24 HOURS PER DAY EVERY DAY.

15.4.3.3. THE SIZE OF A PORTABLE GENERATOR MUST HANDLE THE FIRM PUMPING CAPACITY OF THE

LIFT STATION.

15.5. SPILL CONTAINMENT STRUCTURES.

15.5.1. THE USE OF A SPILL CONTAINMENT STRUCTURE AS A SOLE MEANS OF PROVIDING SERVICE

RELIABILITY IS PROHIBITED.

15.5.2. A LIFT STATION MAY USE A SPILL CONTAINMENT STRUCTURE IN ADDITION TO ONE OF THE

SERVICE RELIABILITY OPTIONS DETAILED IN THIS IN SUBSECTION (A) OF THIS SECTION.

15.5.3. THE REPORT MUST INCLUDE A DETAILED MANAGEMENT PLAN FOR CLEANING AND MAINTAINING

EACH SPILL CONTAINMENT STRUCTURE.

15.5.4. A SPILL CONTAINMENT STRUCTURE MUST HAVE A LOCKED GATE AND BE SURROUNDED AN INTRUDER RESISTANT FENCE THAT IS 6.0 FEET HIGH CHAIN LINK, MASONRY, OR BOARD FENCE WITH AT LEAST THREE STRANDS OF BARBED WIRE OR 8.0 FEET HIGH CHAIN LINK, MASONRY, OR

BOARD FENCE WITH AT LEAST ONE STRAND OF BARBED WIRE.

15.6. A LIFT STATION MUST BE FULLY ACCESSIBLE DURING A 25-YEAR 24-HOUR RAINFALL EVENT.

15.7. LIFT STATION SYSTEM CONTROLS MUST PREVENT OVER-PUMPING UPON RESUMPTION OF NORMAL

POWER AFTER A POWER FAILURE. BACKUP OR STANDBY UNITS MUST BE ELECTRICALLY

INTERLOCKED TO PREVENT OPERATION AT THE SAME TIME THAT OTHER LIFT STATIONS PUMPS ARE

OPERATING ONLY ON THE RESUMPTION OF NORMAL POWER AFTER A POWER FAILURE.

TO DISCHARGE

LIQUID PROCESS

ROLL OFF

RAS

WAS

POLYMER

EXISTING SAND

BEDS

(SECONDARY)

EXISTING BIOLOGICAL PROCESS

REHABILITATE

FINAL CLARIFIER

NEW RAS/WAS

PUMP STATION SOLIDS DEWATERING

DECANT TO

HEADWORKS

WAS

SOLIDS PROCESS

DECANT TO

HEADWORKS

NEW

RECEIVING

MANHOLE

NEW

HEADWORKS

NEW

MAIN PUMP STATION

EXISTING

BIOLOGICAL PROCESS

REHABILITATE

FINAL CLARIFIER

REHABILITATE

CHLORINE BASIN

EXISTING

PUMP STATION

LEGEND

SCREEN

PUMP

EXISTING

STRUCTURE

PROPOSED

STRUCTURE

REHABILITATED

STRUCTURE

LIC

N O.

B Y:

SHEET ID

2H Y-

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-X

FOUO

G R

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US Army Corps of Engineers ®

BUFFALO DISTRICT

FINAL RTA

2H Y-

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-0

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T S

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: 4

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U .S

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2 3 4 5 6 7 8 9 10

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2-G-005

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SHEET ID

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US Army Corps of Engineers ®

BUFFALO DISTRICT

FINAL RTA

2H Y-

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2 3 4 5 6 7 8 9 10

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2-G-006

DESIGN ANALYSIS

DESIGN LOADINGS

THE DESIGN LOADINGS AND FLOWS TO BE USED FOR SIZING VARIOUS

PROCESSES AT THE PIDC WWTP ARE SUMMARIZED AS FOLLOWS:

ACRONYMS: ADF - AVERAGE DAILY FLOW, PDF - PEAK DAILY FLOW

PROCESS DESIGN ANALYSIS

DESIGN PARAMETERS

DESIGN CONDITIONS:

FLOW VALUE UNIT

ADF 0.16 MGD

PDF 0.21 MGD

CURRENT CONDITIONS:

FLOW VALUE UNIT

ADF 0.08 MGD

PDF 0.12 MGD

PARAMETER VALUE UNIT

BOD 200 MG/L

TSS 250 MG/L

AMMONIA 25 MG/L

TEMPERATURE 20 °C

EFFLUENT CONDITIONS

NPDES PERMIT

PARAMETER VALUE UNIT

FLOW 0.16 MGD

BOD 5.0 MG/L

A. NEW HEADWORKS

1. FINE SCREEN

NO. OF UNITS 1 DUTY

TYPE 1/4" PERFORATED PLATE

FLOW 0.21 MGD

AMOUNT OF SCREENINGS 7 - 13.5 FT3/MGAL

DISPOSAL DUMPSTER TO LANDFILL

2. COARSE SCREEN

NO. OF UNITS 1 STANDY

TYPE MANUAL, BAR SCREEN BAR SPACING 3/4"

DISPOSAL DUMPSTER TO LANDFILL

B. NEW MAIN PUMP STATION

NO. OF UNITS 2 DUTY, 1 STANDBY

TYPE SUBMERSIBLE

PUMP SPEED VARIABLEFLOW150 GPM PER DUTY

PUMP TDH 21 FT

MOTOR 1.5 HP

C. EXISTING BIOLOGICAL TREATMENT (TWO TRAINS)

1. OXIDATION DITCH NO. 1 - SOUTH

NO. OF OXIDATION DITCHES 1

DESIGN VOLUME 12,940 FT3

TOTAL VOLUME 19,380 FT3

TYPE EXTENDED AERATION PROCESS

MIXING (PER BASIN) BRUSH ROTOR

NUMBER OF ROTORS 2

HP OF ROTORS 7.5 HP

2. OXIDATION DITCH NO. 2 - NORTH

NO. OF OXIDATION DITCHES 1

DESIGN VOLUME 13,006 FT3

TOTAL VOLUME 25,025 FT3

TYPE EXTENDED AERATION PROCESS

MIXING (PER BASIN) BRUSH ROTOR

NUMBER OF ROTORS 2

HP OF ROTORS 7.5 HP

3. PROCESS OF BOTH

TEMPERATURE 20°C

HYDRAULIC RETENTION TIME 20 HRS

SLUDGE AGE 23 DAYS

F/M RATIO 0.124

WAS 197 LB/DAY

MLSS 4400 MG/L AT LWL

D. EXISTING FINAL CLARIFIER - REHABILITATED

1. FINAL CLARIFIER NO. 1 - SOUTH

DIAMETER 20 FT

DEPTH 13.5 FT

SURFACE AREA 279 FT2

VOLUME 3,348 FT3

SURFACE OVERFLOW RATE 774 GPD/FT2

WEIR OVERFLOW RATE 3,789 GPD/FT

HYDRAULIC DETENTION TIME 2.7 HRS

2. FINAL CLARIFIER NO. 2 - NORTH

DIAMETER 20 FT

DEPTH 14 FT

SURFACE AREA 286 FT2

VOLUME 3,586 FT3

SURFACE OVERFLOW RATE 755 GPD/FT2

WEIR OVERFLOW RATE 3,429 GPD/FT

HYDRAULIC DETENTION TIME 2.9 HRS

3. PROCESS OF BOTH

RESIDUAL SOLIDS CONC 9,000 MG/L

E. EXISTING DISINFECTION SYSTEM - REHABILITATED

1. CHLORINE CONTACT BASIN

NUMBER 2 DUTY

TYPE OPEN CHAMBER

DOSAGE 5 MG/L

VOLUME 1,237 FT3

DEPTH 3.4 FT

EFFLUENT FLOW METER ULTRASONIC OVER V NOTCH WEIR

F. NEW RASWAS PUMP STATION

1. RAS/WAS PUMP STATION

NO. OF RAS PUMPS 2 DUTY

NO. OF WAS PUMPS 1 DUTY, STANDBY FOR RAS

TYPE SUBMERSIBLE PUMP

SPEED VARIABLE

FLOW 150 GPM

TDH 21 FT

MOTOR 1.5 HP

G. DEWATERING UNIT

1. DESIGN - POLYMER FEED SYSTEM

NUMBER OF UNITS 1

FLOW 150 GPM

CAPACITY 18 YD3

CONCENTRATION 0.9% DRY SOLIDS

CAKE CONCENTRATION 15%

FILLS/ROLL OFF 17 FILLS

RATE EMPTY EVERY 2 TO 3 WEEKS

POLYMER CATIONIC EMULSION

POLYMER DOSAGE 20 LBS/DRY TON

2. CURRENT - SAND BEDS

NUMBER 2

FLOW

CAPACITY YD3

CONCENTRATION % DRY SOLIDS

CAKE CONCENTRATION %

FILLS/ROLL OFF FILLS

RATE EMPTY EVERY WEEKS

H. DISPOSAL

OPERATIONS CONTRACT

BIOSOLIDS MANAGEMENT

-6

-4

-2

15 20

28 29

-6

-4

-2

14S

15S

16S

17S

18S

14N

15N

16N

17N

18N

LIC

N O.

B Y:

B…

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