District Safety Requirements for Treatment Plant Pumping Stations.pdf

CENTRAL CONTRA COSTA SANITARY DISTRICT

DISTRICT SAFETY REQUIREMENTS

FOR

TREATMENT PLANT AND PUMPING STATION PROJECTS

SRM 12/1/11

SRM 12/1/11

CONTENTS

Page

I. CONTRACTOR DUTIES 1

II. GENERAL SAFETY REQUIREMENTS

A. Potential Hazards 1 B. Basic Rules 2 C. Power Tools 3 D. Traffic Control 3 E. Isolation of Work Areas 3 F. High Voltage Systems 4 G. Trenching, Excavation, and Shoring 4 H. Medical Treatment 4 I. Fire 4 J. Chemicals 4

III. SPECIAL PROCEDURES AND UNIQUE HAZARDS

A. Confined Space Entries 5 B. System Shutdown Procedure 5 C. Lockout Tagout 6 D. Contractor Hot Work Permits 6 E. Natural Gas and Landfill Gas 7 F. Steam Lines and Steam-Operated Equipment 7

EXHIBITS

A. Contractor Safety Orientation Agenda 8 B. Treatment Plant Hazards 9 C. Contractor Shutdown Request 10 D. Lockout Tagout Flowchart 12 E. Hot Work Permit 13 F. Evacuation and Assembly Areas 14 G. Treatment Plant Site Map 15

I. CONTRACTOR DUTIES

The Contractor expressly assumes any and all duties to assure safety on the job site and all areas affected by the work-related activities.

The Contractor and its subcontractors shall comply with all applicable federal, state and local safety rules, regulations, requirements, and orders in the performance of the contract work. In addition, Contractor and its subcontractors shall comply with all requirements and procedures in this Appendix. Contractor shall take any additional precautions necessary to prevent injury to all persons, property or processes.

The Contractor has the duty to inform all employees, subcontractors, suppliers, and invitees of the District and of Contractor of the job site safety requirements and to enforce these requirements.

The Contractor shall not allow employees or subcontractors to begin work on District projects without a safety orientation specific to the potential hazards of the project. A copy of the District’s Contractor Safety Orientation meeting agenda is included as Exhibit A.

II. GENERAL SAFETY REQUIREMENTS

A. POTENTIAL HAZARDS

1. Treatment Plant

a. Chemicals: Hazardous chemicals including dry and hydrated lime, sodium hydroxide, calcium thiosulfate, hydrogen peroxide, sodium hypochlorite, acids, caustics, propane, gasoline, methane, diesel fuel are used in various prime movers and processes and are stored on or piped around the premises.

b. Ultraviolet Radiation: Ultraviolet radiation is used as part of the disinfection process.

c. Underground and exposed piping and duct systems: Piping and ducts may contain high and low pressure natural gas, methane, high voltage and low voltage energized electrical conductors, sewer gases (hydrogen sulfide and methane) and other hazardous substances.

d. Hazardous Materials: Within the treatment plant site there are buried petroliferous substances generally classified as hazardous materials. There is an on-site management plan for this material.

e. Vehicle Traffic: Large tank trucks deliver various chemicals within the treatment plant daily. Other vehicles and electric carts are operated around the treatment plant site.

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f. Pedestrian Traffic: District employees and other authorized persons walk throughout the treatment plant.

g. Additional Hazards: Some additional hazards are listed on Exhibit B. Other hazards may be identified in the course of the work.

2. Pumping Stations Hazards include the storage and handling of substances including caustic soda, hydrogen peroxide, sodium hypochlorite, diesel fuel, motor oil, anti-freeze and various biological enzymes.

B. BASIC RULES

1. Work shall not begin until all Contractor personnel have been informed of potential hazards and the applicable safety procedures required at each job site.

2. The Contractor shall not operate any District equipment, compressed air, switches, valves or other controls. Contractor shall contact the Engineer or District representative if operation of District equipment becomes necessary.

3. Water:

a. Drinking water shall be supplied by the Contractor.

b. Do not drink water from hose connections located throughout the treatment plant. Most of these connections supply treated wastewater and are posted with signs reading “Do Not Drink”.

c. Water from hose connections should not be used to wash hands or equipment.

d. Water lines throughout the treatment plant are labeled as follows:

1W – city water from the Contra Costa Water District 2W – wastewater (filter plant effluent) 3W – wastewater (plant effluent)

e. To prevent contamination of the city water supply, consult the Engineer before making any cross-connection to any water line.

4. Only tools designed for the task shall be used. Makeshift tools or tools in poor condition shall not be used.

5. Horseplay is not allowed.

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6. Smoking is strictly prohibited inside and outside of all District buildings, facilities and open spaces except where “Smoking Area” signs are posted.

7. Use of alcoholic beverages and/or illegal drugs is strictly prohibited. Workers who use prescription and non-prescription drugs that may interfere with the ability to work safely shall not be allowed on the job site.

C. POWER TOOLS

1. Electric powered hand tools shall be protected by approved ground fault circuit interrupters or shall be double insulated.

2. Fixed electric power tools shall be properly wired and grounded.

3. Pneumatically driver power tools shall be disconnected from air lines when not in use. Air lines shall be properly clipped together.

4. Powder-actuated tools shall be used only by certified personnel with a valid license in their possession.

D. TRAFFIC CONTROL

1. All Contractors shall:

a. Install and maintain required traffic control devices,

b. Provide appropriately equipped and trained flaggers when required,

c. Schedule and expedite the work to cause the least inconvenience to District operations and activities,

d. Provide adequate safeguards for workers and District personnel, and

e. Wear appropriately colored warning garments outfitted with reflective material for nighttime work.

2. All work on streets, roadways or similar thoroughfares shall comply with the State of California, Department of Transportation’s Manual of Traffic Controls for Construction and Maintenance Work Zones and any local ordinances.

3. No work may be performed in any public right of way without permission from the authorizing agency.

E. ISOLATION OF WORK AREAS

A Contractor may ask the Engineer to restrict access to active construction areas to only those persons engaged in the work and to

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District personnel who are required to have access to controls or equipment in the work area.

F. HIGH VOLTAGE SYSTEMS

All work on high voltage electrical systems shall be done in accordance with the CalOSHA High Voltage Electrical Safety Orders and the National Electric Code (NEC).

Work on high voltage electrical systems shall be coordinated with District electricians and plant operations personnel.

G. TRENCHING, EXCAVATION, AND SHORING

Contractor shall comply with CalOSHA Article 6, Excavations Construction Safety Orders. Contractors shall maintain a competent person on site during excavations.

H. MEDICAL TREATMENT

1. The Contractor shall comply with the first aid requirements of the CalOSHA Construction Safety Orders.

2. The Contractor shall make prior arrangements for emergency medical care and for transportation of injured Contractor or subcontractor personnel.

3. For medical emergencies at the Treatment Plant, call 911 (or 9- 911 from a District phone) and then notify the Plant Operations Control Room (x 214 or 229-7214) of the emergency.

4. For medical emergencies at a Pumping Station, call 911 and then notify any available District personnel on site.

I. FIRE

1. The Contractor shall have fire extinguishers at the job site. For work that generates sparks or open flames, appropriate fire extinguishers shall be readily available at the specific work site.

2 For fire-related emergencies at the Treatment Plant, call 911 (or 9-911 from a District phone) and then notify the Plant Operations Control Room (x 214 or 229-7214) of the emergency.

3. For fire-related emergencies at a Pumping Station, call 911 and then notify any available District personnel on site.

J. CHEMICALS

Contractors and all subcontractors bringing their own chemicals on site shall inform those working in the area and shall post MSD sheets at the job site as long as the chemicals remain there.

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III. SPECIAL PROCEDURES AND UNIQUE HAZARDS

A. CONFINED SPACE ENTRIES (from Section 3.3.1 of the District’s Confined Spaces Safety Directive)

1. Contractors performing Confined Space entries on District property must:

a. Comply with CalOSHA regulations as applied to employers engaged in construction work,

b. Complete a District safety orientation on the hazards specific to the Confined Space, the work being performed, and applicable communication protocols and emergency response procedures,

c. Advise District staff of any impacts their work could have on District employees working near the Confined Space entry area,

d. Post their Permit-Required Confined Space Permits at the entry site and/or make the Permit immediately accessible to District employees upon request, and

e. Provide copies of any Confined Space Entry Permits to the Control Room before any entries begin.

2. If employees from multiple contractors enter a Confined Space, the Controlling Contractor must coordinate each entry to ensure all safety requirements have been met; that Entrants, Attendants, and support personnel duties have been identified;

and that communication protocols and emergency response procedures are consistent.

3. If a separate entity is retained to provide rescue services, the Controlling Contractor and its employees will follow the emergency notification and response procedures established by that rescue services entity.

4. Upon completion of the contracted work, the Controlling Contractor and its employees shall participate in a debriefing with District staff (Project Manager and/or Safety Officer and/or designees) to discuss any hazards confronted or created in the Confined Space during the entry operations.

B. SYSTEM SHUTDOWN PROCEDURE

When the Contractor’s work involves tying in to an existing, live treatment plant or pumping station system, the system shall be shut down prior to the commencement of work. The Contractor shall complete and present the Contractor Shutdown Request form (Exhibit C) to the Engineer at least two weeks before the actual

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system shutdown. The Engineer shall note any special safety precautions on the Contractor Shutdown Request.

An authorized Contractor representative shall sign the Shutdown Request form. By signing this form, Contractor acknowledges its receipt and its understanding of the form and agrees to start work at the approved date and time.

C. LOCKOUT TAGOUT (from Section 6 of the District’s Lockout Tagout Safety Directive)

1. Contractors must comply with the group kit requirement when contractor work coincides with plant maintenance and operations LOTO.

2. Contractors (authorized by the District) shall use a lock/tag system jointly agreed upon that meets the shared requirements of the LOTO programs.

3. Contractors are required to provide their own singularly keyed lockout lock(s).

4. It is the responsibility of Contractors to properly install lockout locks and tags. Contractors are to remove their lockout lock(s) and tag(s) when they have completed their assigned job tasks.

5. Additional lockout tagout procedures for Contractors are shown in Exhibit D.

D. CONTRACTOR HOT WORK PERMITS

1. Use of Hot Work Permits

Permits are required prior to welding, cutting, burning, soldering, use of an open flame, or when ignition sources are initiated anywhere within the treatment plant or pumping station fenced boundaries.

2. Procedure

a. A Hot Work Permit (Exhibit E) shall be issued to the

Contractor or its designated representative by the Inspector. Hot work on equipment or in areas controlled by the District shall not proceed without the permission of the Engineer. Contractor may request designation of special work areas and blanket Hot Work Permits for fabrication activities. Blanket permits apply only to special work areas and may not be issued for more than thirty (30) days.

A daily Hot Work Permit is required when the Contractor is working in an area that is hazardous by nature or in any area where District employees are working.

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b. The Inspector issuing the Hot Work Permit shall indicate on the permit what personal protective equipment is required and any specific safety precautions the Contractor shall observe. Before issuing the permit, the Inspector shall inspect the area for combustibles and verify that no explosive atmosphere is present.

c. Two copies of the Hot Work Permit shall be transmitted to the Engineer, who will forward one copy to the Plant Operations Superintendant or his/her designated representative at least one hour before the work will begin.

d. Contractor personnel assigned to hot work activities shall meet all requirements noted on the permit before beginning work.

3. Fire Watch A fire watch shall be used when welding above combustible material or near operating equipment. The need for a fire watch will be specified on the Hot Work Permit written for the job.

The Contractor shall assign fire watch personnel and ensure that such personnel are adequately instructed in their duties and responsibilities. An adequate number and type of fire extinguishers shall be available for immediate use.

E. NATURAL GAS AND LANDFILL GAS

When Contractor personnel are working on natural gas or landfill gas (methane) systems, they shall be abide by District Lockout Tagout procedures.

The systems shall be purged with nitrogen. The Contractor shall conduct air monitoring for gases and shall not proceed with any work until the level of gas reaches a non-explosive level.

F. STEAM LINES AND STEAM-OPERATED EQUIPMENT

The Contractor shall notify the Engineer at least five (5) days before its personnel intend to work on any part of the steam system.

When Contractor personnel are working on steam lines and/or steam-operated equipment they shall abide by District Lockout Tagout procedures.

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EXHIBIT A

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EXHIBIT B

Treatment Plant Hazards

• Sodium Hypochlorite

• Slips, Falls into Primary Sedimentation Basins; Clarifiers

• Vehicle and Pedestrian Traffic

• Raw sewage, primary effluent, secondary effluent or final effluent

• Hydrogen peroxide

• Hydrogen sulfide

• UV – ultraviolet radiation

• Asbestos & Cam 17 Metals

• Confined Spaces

• Fire Suppression Systems

• Electrical Underground Conduit

• Electrical Substations o Filter Plant/Recycled Water o UV Disinfection o Pump & Blower Bldg o Standby Power Bldg o Headworks o Solids Conditioning Bldg o Secondary N & S Clarifiers A & N Tanks

Solids Conditioning Building

• Ash

• Hydrogen Sulfide

• Methane

• Phosphoric Acid

• Sodium Hydroxide

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EXHIBIT C – CONTRACTOR SHUTDOWN REQUEST

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EXHIBIT D – LOCKOUT TAGOUT FLOWCHART

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EXHIBIT E

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EXHIBIT F – Evacuation and Assembly Areas

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PLANT GRID NORTH

CAL GRID NORTH

22^17’26"

FEET

G ra y so n C re e k

SubStation 33

SubStation 34

Holding Basin "A"

South

MCC 81 Sludge

Thickeners

SubStation 81

Filter Plant

Forebay

Filter

Plant

Clearwell

Holding Basin "A"

North

NAX

Plant

Filter Plant

Operations Bldg.

DAF Area

SubStation 73

Mechanical

Maintenance Bldg.

Holding Basin "B"

Holding Basin "C"

Alum

Sludge

Ponds

Walnut Creek

SubStation 32

Drain

Structure

Drain

Structure

Basin "B"

Sump Pump

Basin "C"

Sump Pump

Diffuser

Structure

MCC 42

N.E. Sump

Sludge Blending Tank

Emergency Sludge

Storage Tank

U.V. Bldg.

Substation 17

SubStation 40

Hypo Site 2 Diversion Structure

Influent Structure

Structure 1

Structure 1A

Hypo Site 1

Junction Structure "D"

Primary OCU

RAS Pump Pits

Trailer 1

Wet Weather

Structure

"A South"

Power Building

MCC 48

Backwash

Pumps

Industrial

Water Pumps

Auto/Eq.

Fuel Pumps

SubStation 82

Materials

Control Building

Pump Station

Emergency Lime Slaker

Solids Conditioning Bldg.

Plant Operations Administration Area

Headquarters Office Building

Chemical Feed Building

Backwash Tank

Primary

Sedimentation Tanks

Standby Power Building

Junction Structure "J"

Wet Weather

Structure

"A North" Drain Back

Sump Pump

Wet Weather

Structure "B"

100 PSI

Metering Yard

Sulfur Dioxide

Building

North South

UV Channel

Pump/Blower Bldg.

LEGEND:

Chainlink fence

Emergency Exit Gate

Single Gate

Double Gate

DAF Biofilter IMHOFF PLACEIMHOFF DRIVEMH 18

Buildings & Grounds

Condenser Cooling Pumps

Influent Diversion Bldg.

Wet Weather Structure

S.C.B. Odor Control Unit

Household

Hazardous Waste

Collection Facility

4737 Imhoff Place Warehouse

Fuel Oil Storage

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Bioassay Trailer

Trailer 2

SubStation 16

Bypass Struct.

Odor Control

Gas Yard

Cogen. Gas Compressor

Applied Water Pumps (3)

Applied Water Pumps VFD Bldg.

Drain Back

Channel

200 PSI

Metering Yard

Dechlorination Bldg.

Metering MH

Maintenance & Reliability

Center (MRC)

Laboratory

Electrical Switch Building

Clearwell

Overflow

Structure

Aeration

Tanks

Dolan’s

Pond

Clarifiers

(Secondary Sed Tanks)

Clarifiers

(Final Sed Tanks)

Junction

Structure "JS1"

PLANT GRID NORTH

CAL GRID NORTH

22^17’26"

FEET

IMHOFF PLACEIMHOFF DRIVE

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