**November 21, 1997**

**Contract \# AQ-1486A**

\*\*\*\*\* Paragraph Numbered Format \*\*\*\*\*
\*\*\*\*\*\*\* Copyright 1988, ARCOM \*\*\*\*\*\*\*
ARCHITECTURAL COMPUTER SERVICES, INC.

**SPECIAL SPECIFICATION**

**SECTION 11610-S**

**[LABORATORY FUME HOODS]{.underline}**

[Page]{.underline}

[PART 1 - GENERAL]{.underline}

1.01 Summary 3

1.02 Design Requirements 3

1.03 Submittals 4

1.04 Quality Assurance 5

1.05 Delivery, Storage, and Handling 5

1.06 Project Conditions 5

1.07 Sequencing and Scheduling 6

1.08 Warranty 6

[PART 2 - PRODUCTS]{.underline}

2.01 Manufacturers 6

2.02 Materials 7

2.03 Benchtop Chemical Fume Hoods 8

2.04 Isotope Hoods 14

2.06 Walk-in Hoods 24

2.07 Canopy Hoods 24

2.08 Fume Hood Metal Finish 24

2.09 Source Quality Control Testing of Epoxy Resin Work Surface 25

2.10 Source Quality Control Testing of Poly Resin Liner 26

2.11 Source Quality Control Testing of Fume Hoods 29

2.12 Source Quality Control Testing of Fume Hoods 29

2.13 Source Testing of Fume Hood Sound Levels 29

[PART 3 - EXECUTION]{.underline}

3.01 Installation 30

3.02 Field Quality Control Testing of Fume Hoods 30

3.03 Field Quality Control Testing of Fume Hoods 31

3.04 Adjusting 31

3.05 Cleaning 32

3.06 Protection of Finished Work 32

**SPECIAL SPECIFICATION**

**SECTION 11610-S**

**[LABORATORY FUME HOODS]{.underline}**

THIS SECTION USES THE TERM \"ARCHITECT.\" CHANGE THIS TERM AS NECESSARY
TO MATCH THE ACTUAL TERM USED TO IDENTIFY DESIGN PROFESSIONAL AS DEFINED
IN THE GENERAL AND SUPPLEMENTARY CONDITIONS.

[PART Number range level0Number range level1Number range level2Number
range level3Number range level4Number range level5Number range
level6Number range level71 ‑ GENERAL]{.underline}

1.01 [SUMMARY]{.underline}

A. Section Includes:

1\. Laboratory fume hoods

B. Related Sections:

1.  Section 01700-S Commissioning.

2.  Section 11601: Laboratory Casework and Furnishings

3\. Division 15: Furnishing and installation of plumbing utilities and
final connections to fume hoods.

4\. Division 15: Furnishing and installation of exhaust duct work and
equipment, and final connection of fume hoods.

5\. Division 15: Furnishing and installation of exhaust controls and
final connections to hoods.

6\. Division 16: Furnishing and installation of electrical utilities and
final connections to fume hoods.

1.02 [DESIGN REQUIREMENTS]{.underline}

A. Fume hoods shall function as ventilated, enclosed work‑spaces,
designed to capture, confine and exhaust fumes, vapors and particulate
matter produced or generated within the enclosure.

B. Design fume hoods for consistent and safe air flow through the hood
face. Negative variations of face velocity shall not exceed 10 percent
of the average face velocity at any designated measuring point as
defined in this section.

C. Average illumination of work area: Minimum 80 footcandles. Work area
shall be defined as the area inside the superstructure from side to side
and from face of baffle to the inside face of the sash, and from the
working surface to a height of 28 inches.

D. Fume hood shall be designed to minimize static pressure loss with
adequate slot area and bell shaped exhaust collar configuration. Average
static pressure loss readings taken 3 diameters above the hood outlet
from 4 points, 90 degrees apart, shall not exceed the
following maximums:

**Face Velocity Measured S.P.L. (W.G.)**

75 FPM 0.18 inches

100 FPM 0.30 inches

125 FPM 0.45 inches

E. Fume hoods shall be constructed in such a manner as to cause no
perceptible increase in sound pressure level over the mechanical
exhaust system.

F. Maintenance Manuals: Provide one written instruction manual for each
hood and two additional for each type of hood outlining operating/safety
instructions and proper maintenance procedures.

1.03 [SUBMITTALS and SUBSTITUTIONS:]{.underline}

A. Product Data: Submit manufacturer\'s data for each type of hood
specified. Include component dimensions, configurations, construction
details, joint details, and attachments. Indicate location, size, and
service requirement for each utility connection.

B. Shop Drawings:

1\. Provide 3/4 inch = 1\'‑0\" scale elevations of individual and
battery of hoods showing cross sections, rough‑in and anchor placements,
tolerances, and clearances. Indicate relation to other laboratory
equipment, surrounding walls, windows, doors, and other
building components.

2\. Provide 1/4 inch = 1\'‑0\" rough‑in plan drawings for coordination
with trades.

3\. Provide 1 set of sepia reproducible prints and 1 set of
blueline prints.

C. Top Samples: Submit product sample of each type of benchtop.

D. Finish Samples: Submit 3 inch by 5 inch samples of color of finish
for fume hoods, work surfaces and for other prefinished equipment and
accessories for selection by the Owner\'s Representative.

E. Test Reports: Submit test reports verifying conformance to specified
performance tests.

F. Life Cycle Tests: Provide independent test data for sash hardware
components such as cables and pulleys.

G. Maintenance Manuals: Provide written instruction manuals outlining
operating/safety instructions and proper maintenance procedures.

> H. Submit the above in accordance with section 1300-S.
>
> I. Substitutions on listed manufacturers in this specification shall
> be performed per the requirements of section 1600-S.

1.04 [QUALITY ASSURANCE]{.underline}

A. Single Source Responsibility: Fume hoods, casework, work surfaces,
laboratory furnishings, and accessories shall be furnished by a single
laboratory furniture company.

B. Manufacturer\'s Qualifications: Modern plant with proper tools, dies,
fixtures, and skilled production staff to produce high quality
laboratory casework and equipment, and shall meet the following
minimum requirements:

1\. Five years or more experience in manufacture of laboratory casework
and equipment of type specified.

2\. Ten installations of equal or larger size and requirements.

C. Installer\'s Qualifications: Factory trained and certified by
the manufacturer.

1.05 [DELIVERY, STORAGE, AND HANDLING]{.underline}

A. Delivery: Schedule delivery of fume hoods and equipment so that
spaces are sufficiently complete that material can be installed
immediately following delivery.

B. Handling: Protect finished surfaces from soiling or damage during
handling and installation. Keep covered with polyethylene film or other
protective coating. Protect all work surfaces throughout construction
period with 1/4 inch corrugated cardboard completely covering the top
and securely taped to edges.

1.06 [PROJECT CONDITIONS]{.underline}

A. Do not deliver or install equipment until the following conditions
have been met:

1\. Building areas requiring the installation of laboratory casework
shall be dry and unexposed to adverse weather conditions which may
damage finished materials.

2\. Interior building temperatures shall not register below 65 degrees
Fahrenheit in areas of casework installation to permit the proper curing
of epoxy sealants and adhesives.

1.07 [SEQUENCING AND SCHEDULING]{.underline}

A. All overhead mechanical, electrical and plumbing rough‑in work shall
be complete prior to laboratory casework deliveries.

B. All mechanical, electrical and plumbing rough‑in work required along
walls and service islands, where lab furnishings are to be installed, is
to be complete prior to delivery of materials.

C. Walls and partitions must be in place and finished with at least the
primer coat of paint. If finish painting is to take place after lab
furnishing, installation, protect the casework and furnishings by
covering and masking prior to commencement.

D. All necessary wood or metal blocking must be installed within
partitions prior to delivery of casework and furnishings.

E. Overhead soffits and ceiling grid must be in place prior to
casework installation.

F. Overhead lighting must be installed and connected prior to
casework installation.

G. All flooring required to be placed under lab casework and furnishings
must be installed prior to material delivery.

H. Concrete floors must be level within 1/8 inch of level per 10 foot
run, nonaccumulative, when tested with a straight edge in any
one direction.

I. Wet operations to be performed must be complete prior to
material deliveries.

1.08 [WARRANTY]{.underline}

A. Provide a 1‑year warranty against defects in materials
and workmanship.

[PART 2 - PRODUCTS]{.underline}

2.01 [MANUFACTURERS]{.underline}

A. Subject to compliance with requirements, provide products by one of
the following:

1\. Fisher Hamilton Scientific Inc.

1316 18th Street

Two Rivers, Wisconsin  54241

2\. Kewaunee Scientific Corporation

Laboratory Division

PO Box 5400

Statesville, North Carolina  28677

3\. Ly-Line Airguard

P.O. Box 38

2251 Cole Street

Enumclaw, Washington  98022

4.  Air Master Corp.

6480 Norton Center Dr.

Muskegon, MI 49441

5\. Substitutions: only under provisions of section 1600-S.

B. Casework, furnishings and equipment specified in the following
sections shall be furnished and installed by the same supplier:

1\. Section 11601: Laboratory Casework and Furnishings

2\. Section 11605: C‑Frame Laboratory Furniture System

2.02 [MATERIALS]{.underline}

A. Sheet Steel:

1\. Metallic Furniture Stock: ASTM A‑366 mild steel, cold‑rolled,
pickled, double annealed, and free from rust, scales, scratches,
buckles, ragged edges, and other defects.

2\. Minimum Gages:

a\. All gages indicated shall be US Standard.

b\. 18 gage thick exterior casing, ceiling closure panels, and bottom
sash rail.

B. Stainless Steel:

1\. Type 304: ASTM A240; 16 gage; exposed surfaces ground and polished
to a Number 4 finish.

2\. Type 316: ASTM A240; 16 gage; exposed surfaces ground and polished
to a Number 4 finish.

3\. Welding: All stainless steel welding material shall be of type
similar to sheet material. Welds shall be made without discoloration;
ground, polished, and passivated to blend harmoniously with a Number 4
satin finish.

C. Epoxy Resin Sheets:

1\. Molded from modified epoxy resin that has been especially compounded
and cured to provide optimum physical and chemical resistance required
of a heavy duty laboratory working surface. Uniform mixture throughout,
not dependent on a surface coating.

2\. Physical Properties:

a\. Compressive Strength (ASTM D695): 30,600 psi

b\. Flexural Strength (ASTM D790): 12,800 psi

c\. Tensile Strength (ASTM D638): 10,100 psi

d\. Heat Distortion (ASTM D648): 330 degrees Fahrenheit

e\. Water Absorption (ASTM D570):  0.018 percent

f\. Fire Resistance (ASTM D635): Self Extinguishing

D. Glass: 7/32 inch clear laminated safety glass.

2.03 [BENCHTOP CHEMICAL FUME HOODS]{.underline}

A. Superstructure:

1\. Wall: Rigid, self supporting assembly of double wall construction,
maximum 5 inches thick. Double wall shall consist of a sheet steel outer
shell and a corrosion resistant inner liner and shall house and conceal
steel framing members, attaching brackets and remote operating service
fixture mechanisms and services. Panels must be attached to a full frame
construction, minimum 14 gage thick galvanized members. Panels and
brackets attached to eliminate screw heads and metallic bracketry from
hood interior. Hoods shall be completely factory assembled to form a
rigid, self-supporting structure.

2\. Exterior bypass grille: Low resistance type, 18 gage steel, upward
directional louvers.

3\. Interior Bypass:

a\. Provide an interior bypass plate on all variable volume or constant
volume hoods with combination sashes and on all variable volume hoods
with a vertical rising sash.

b\. The bypass area shall remain open on all constant volume hoods with
a vertical rising sash.

4\. Bypass plate: 16 gage thick with 1/4 inch diameter holes; 1/2 inch
on center in a staggered pattern; 23 percent open area. Provide with a
urethane powder coat finish to match color of hood liner.

5\. Ceiling closure panel: Minimum 18 gage thick, finish to match hood.
Provide with hinged panel for access to hood lights, piping and exhaust
duct connections.

6\. Fastenings:

a\. Exterior structural members attachments: Sheet metal screws,
zinc plated.

b\. Interior fastening devices concealed. Exposed screws not acceptable.

c\. Exterior panel member fastening devices concealed. Exposed screws
not acceptable.

B. Face Opening:

1\. Air foil or streamlined shape with all right angle corners radiused
or angled:

2\. Air foil: Bottom horizontal foil shall provide nominal 1 inch bypass
when sash is in the closed position. Bottom foil shall be removable
without use of special tools. Foil shall provide access areas for
electrical cords. Bottom foil to be constructed of Type 304 stainless
steel, with an acid and abrasion resistant paint coating applied by an
electrodeposition process. Color to be selected by the
Owner\'s Representative.

3\. Flush sill air foil: Lower front assembly shall consist of a trough
with hinged louvered horizontal panels forming a flush sill.

a\. Trough to be 16 gage thick, Type 304 stainless steel with an acid
and abrasion resistant paint coating applied by an electrodeposition
process. Provide 1 inch square 1/16 inch thick rail secured to fume hood
end panels for reinforcement. Finish same as trough.

b\. Slotted angle horizontal panels, 16 gage thick stainless steel,
Type 304, with linear polyurethane finish. Spot weld stand‑offs to
reinforcement rail and bolt at each end of horizontal panel
to stand‑offs.

c\. Panel slot patterns and size as follows:

1\) 48 inch wide fume hood: (2) 19 inch long panels

2\) 72 inch wide fume hood: (2) 31 inch long panels.

3\) 96 inch wide fume hood: (3) 28‑1/2 inch long panels.

d\. Color selection of finishes by Owner\'s Representative.

C. Sash:

1\. Full view type with clear, unobstructed, side to side view of fume
hood interior and service fixture connections.

2\. Vertical rising sash: 2 inches maximum height bottom sash rail,
18 gage thick steel with a polyurethane powder coat finish. Provide
integral formed flush pull the full width of bottom rail. Set safety
glass into rails in deep form, extruded polyvinyl chloride glazing
channels. Counter balance system: Single weight, pulley, cable, counter
balance system shall prevent sash tilting and permit one finger
operation at any point along full width pull. Maximum 7 pounds pull
required to raise or lower sash throughout its full length of travel.
Design system to hold sash at any position without creep and prevent
sash drop in the event of cable failure. Sash and counterbalance
mechanism to be life cycle tested to withstand a minimum of
100,000 cycles without signs of fatigue. Submit independent test data.
Open and close sash against rubber bumper stops.

3\. Horizontal sliding sash: Bottom H‑shaped rail to be 18 gage thick
stainless steel with stainless steel roller wheels set on 18 gage thick
stainless steel track. Top track to be extruded polyvinyl chloride set
in 18 gage thick stainless steel U‑channel assembly. All stainless steel
components finished with polyurethane finish. Color selection by the
Owner\'s Representative.

4\. Sash glass: 7/32 inch thick laminated safety glass.

5\. Sash cables: Stainless steel, 1/8 inch diameter.

6\. Sash guides: Corrosion resistant polyvinyl chloride.

7\. Pulley assembly for sash cable: 2 inches diameter, zinc dichromate
finish, ball bearing type, with cable retaining device.

8\. Sash pull: Steel with chemical resistant powder coating. Color
selection by the Owner\'s Representative.

D. Liners:

1\. Polyester liner: Reinforced glass polyester panel; smooth finish and
white color in final appearance. Flexural strength: 7,450 psi. Flame
spread: 15 or less per UL 723 and ASTM E84‑80. Manufactured by Western
Slate Company, \"Westliner LC 210\". Provide gasketed access panels in
the liner for access to valves and fittings. Panels shall be of the same
material as the liner and be provided with a PVC gasket to eliminate air
leakage and retain liquids inside the hood.

E. Baffles:

1\. Provide baffles to control air vectors into and through the fume
hood. Fabricate of the same material as the liner. All baffle
supports/brackets to be nonmetallic.

2\. Baffle designs which permit close‑off of all slots are
not acceptable.

3\. Must comply with OSHA Lab Standard Guidelines.

4\. Provide acid resistant label indicating proper baffle operation.
Locate label on sidewall of hood interior.

5\. Provide for baffle adjustment to allow repositioning prior to hood
operation permitting setting for (1) high thermal loading, (2) heavier
than air gases or fumes generated near work surface, and (3) normal or
average operation.

6\. Provide with remote baffle adjustment. Toggle style, one handed,
single point control accomplished while hood is in use, without
disturbing apparatus, from outside right hand corner post of fume hood
with sash in either the open or closed position, and permitting setting
for (1) high thermal loading, (2) heavier than air gases or fumes
generated near work surface, and (3) normal or average operation.

F. Work Surfaces:

1\. Molded epoxy resin: For hoods with Poly resin liners. Color to be
selected by the Owner\'s Representative from the manufacturers standard
black, gray or white colors. Work surface as manufactured by The Durcon
Company, Inc.; Prime Industries; or Laboratory Tops, Inc. 1‑1/4 inches
thick surface, dished 1/4 inch to contain spills.

G. Sinks

1\. Cup Sinks: Epoxy resin

a\. Manufacturer: The Durcon Company; Prime Industries; or Laboratory
Tops, Inc.

b\. Size: 4‑3/8 inches by 13‑3/4 inches by 5‑7/16 inches deep with a
minimum wall thickness of 3/8 inch.

c\. Screen: Type 316 stainless steel, 0.028 wire diameter, 8 by 8 mesh
per square inch.

d\. Provide swivel sink strainer adapter, Town & Country Plastics
Model PP‑18; R&G Sloane Part Number 7218; or Scientific Plastics
Company, Inc., Part Number 31595‑158.

2\. Cup Sinks: Stainless steel

a\. Size: 4‑3/8 inches by 13‑3/4 inches by 5‑7/16 inches deep.

b\. Constructed of Type 304 stainless steel, minimum thickness 18 gage
thick, Number 4 mil. polish finish. All joints butt welded and ground
smooth. Pitch bottoms to drain outlet.

c\. Screen: Type 316 stainless steel, 0.028 wire diameter, 8 by 8 mesh
per square inch.

d\. Provide swivel sink strainer adapter, Town & Country Plastics
Model PP‑18; R&G Sloane Part Number 7218; Scientific Plastics Company,
Inc., Part Number 31595‑158.

3\. Lab Sinks: Epoxy resin

a\. Manufacturers: The Durcon Company; Prime Industries; or Laboratory
Tops, Inc.

b\. Minimum wall thickness of 1/2 inch with all interior corners coved
to 1‑1/2 inch radius and bottoms pitched to outlet opening. Provide with
1‑1/2 inch outlet and beehive overflow. Overflow to be 2 inches shorter
than depth of sink.

c\. Provide swivel sink strainer adapter, Town & Country Plastics
Model PP‑18; R&G Sloane Part Number 7218; or Scientific Plastics
Company, Inc., Part Number 31595‑158.

H. Lighting:

1\. Fixture: 2 T-8 lamps, electronic ballast, UL listed fluorescent
light fixture with sound rated ballast installed on exterior of fume
hood roof. Provide safety glass panel cemented and sealed to the
hood roof.

2\. Interior of fixture: White, high reflecting plastic enamel.

3\. Size: Largest possible up to 48 inches for hoods with
superstructures up to 6 feet. Provide (2) 36 inch fixtures for hoods
with 8 foot superstructures.

4\. Include lamps with fixtures.

5\. Illumination: 80 footcandle minimum.

6\. Lamps and ballast to be the same type as specified in
Division 16 for overhead lighting in laboratory spaces.

I. Electrical Power:

1\. Three wire grounding type receptacles, as indicated on the Drawings,
rated at 120 VAC at 20 amperes.

2\. Receptacles to be gray in color with stainless steel flush plates.

3\. Factory install receptacles, lighting, electrical fittings and
wiring in accordance with applicable codes and
Division 16 specifications.

4\. Provide a dedicated receptacle on top of hood for safety monitor
and alarms.

J. Service Fittings and Piping:

1\. Hoods shall be factory prepiped to a point of connection 2 inches
above the hood roof. Piping materials and installation for each type of
service shall be as specified under Division 15. Pressure test all
prepiped lines in the factory.

2\. Service fittings within fume hoods shall have color coded, acid and
solvent resistant plastic coating, applied over fine sandblasted
surface, properly cleaned. Surfaces to be coated shall be sprayed and
baked three times with minimum coating thickness of 6 mil.

3\. Control Valves: Control valves shall be mounted on the front panel
of the fume hood, with all components subject to wear accessible from
the exterior of the hood. The valve stem shall be for fume hoods with
airfoil 45 degrees to the side wall of the fume hood. The centerline of
the valve inlet and outlet shall be parallel and 1‑1/8 inches apart.
Valves shall have a threaded collar to hold the valve in place.

4\. Color coding of hood interior service fittings and remote control
valves shall be as specified for Laboratory Service Fittings in the
Laboratory Casework and Furnishings Section of this Specification.

K. Exhaust Outlet:

1\. Rectangular with ends radiused, shaped and flanged, 18 gage thick,
steel. Finish with epoxy powder coating. Color to match liner.

2\. Provide exhaust duct transition from the hood rectangular exhaust
outlet to the building exhaust system round duct connection. Fabricate
transition of the same material as the exhaust outlet. Epoxy powder coat
inside and outside.

L. Safety Monitor/Alarm System:

1\. Each fume hood shall be equipped with a velocity control and safety
alarm unit which is to be Sandia Furnished Equipment and installed and
connected by contractor. Provide factory cut‑outs in the front of the
hood for field mounting of the unit. Coordinate location and size of
cut‑out for installation of Landis & Staefa keypad unit 537-720A.
Connection of control and safety alarm unit to sensors and control
valves shall be under Division 13.

M. Safety Monitor/Alarm Systems:

1\. Provide fume hood monitor with audible and visual alarm signals to
activate if face velocity drops below 80 fpm or rises above 180 fpm.
Alarm setpoints to be field adjustable.

2\. Audible alarm signal tone shall be a minimum of 85 decibels at 10
centimeters. Visual alarm signal shall be a flashing or continuous
glowing red light. Alarm design shall permit silencing of tone signal,
but red visual signal light shall glow until unsafe condition is
corrected. Provide with circuitry and a pushbutton to test
alarm circuits.

3\. The Fume Hood Control System shall be able to interface with the
EMCS system called out in specification 13000.

4\. Provide with input/output accessory to send alarm signal to a remote
location and for silencing alarm remotely.

5\. Electrical: 9 volt DC, maximum of 1 amp. Provide 120 Vac. Shall be
provided by division 16.

N. Instruction Plate:

1\. Permanent 4 inch by 6 inch plate attached to fume hood exterior with
condensed information covering recommended locations for apparatus and
accessories, baffle settings, use of sash, and recommended safe
operating procedures.

2\. Provide a 4 inch by 6 inch corrosion resistant metal or plastic
frame attached to front face of fume hood exterior with plastic or glass
glazing to contain a removable data card to identify hood and show hood
characteristics and field test data.

2.04 [ISOTOPE HOODS]{.underline}

A. Superstructure:

1\. Wall: Rigid, self supporting assembly of double wall construction,
maximum 5 inches thick. Double wall shall consist of a sheet steel outer
shell and a stainless steel inner liner and shall house and conceal
steel framing members, attaching brackets and remote operating service
fixture mechanisms and services. Hoods shall be completely factory
assembled to form a rigid, self‑supporting structure.

2\. Exterior bypass grille: Low resistance type, 18 gage steel, upward
directional louvers.

3\. Interior Bypass:

a\. Provide an interior bypass plate on all variable volume or constant
volume hoods with combination sashes and on all variable volume hoods
with a vertical rising sash.

b\. The bypass area shall remain open on all constant volume hoods with
a vertical rising sash.

4\. Bypass plate: 16 gage thick with 1/4 inch diameter holes; 1/2 inch
on center in a staggered pattern; 23 percent open area. Provide with a
urethane powder coat finish to match color of hood liner.

5\. Ceiling closure panel: Minimum 18 gage thick, finish to match hood.
Provide with hinged panel for access to hood lights, piping and exhaust
duct connections.

6\. Fastenings:

a\. Exterior structural members attachments: Sheet metal screws,
zinc plated.

b\. Interior fastening devices concealed. Exposed screws not acceptable.

c\. Exterior panel member fastening devices concealed. Exposed screws
not acceptable.

B. Face Opening:

1\. Air foil or streamlined shape with all right angle corners radiused
or angled.

2\. Air foil: Bottom horizontal foil shall provide nominal 1 inch bypass
when sash is in the closed position. Bottom foil shall be removable
without use of special tools. Foil shall provide access areas for
electrical cords. Bottom foil to be Type 304 stainless steel.

C. Sash:

1\. Full view type with clear, unobstructed, side to side view of fume
hood interior and service fixture connections.

2\. Vertical rising sash: 2 inches maximum height bottom sash rail,
18 gage thick, Type 304 stainless steel. Provide integral formed flush
pull the full width of bottom rail. Set safety glass into rails in deep
form, extruded polyvinyl chloride glazing channels. Counter balance
system: Single weight, pulley, cable, counter balance system shall
prevent sash tilting and permit one finger operation at any point along
full width pull. Maximum 7 pounds pull required to raise or lower sash
throughout its full length of travel. Design system to hold sash at any
position without creep and prevent sash drop in the event of cable
failure. Sash and counterbalance mechanism to be life cycle tested to
withstand a minimum of 100,000 cycles without signs of fatigue. Submit
independent test data. Open and close sash against rubber bumper stops.

3\. Horizontal sash: Bottom H‑shaped rail to be 18 gage thick, Type 304
stainless steel with stainless steel roller wheels set on 18 gage thick
stainless steel track. Top track to be extruded polyvinyl chloride set
in 18 gage stainless steel U‑channel assembly.

4\. Sash glass: 7/32 inch thick laminated safety glass.

5\. Sash cables: Stainless steel, 1/8 inch diameter.

6\. Sash guides: Corrosion resistant polyvinyl chloride.

7\. Pulley assembly for sash cable: 2 inches diameter, zinc dichromate
finish, ball bearing type, with cable retaining device.

8\. Sash pull: Type 304 stainless steel.

D. Liner:

1\. Type 304 stainless steel liner: 16 gage thick, welded seamless
construction. All vertical and horizontal corners and seamless joints
between work surface and sides and back coved to a 1/2 inch radius,
continuous welded, ground and blended to a fine grained finish. Seams
between working surface and sides and back are not acceptable. Provide
gasketed stainless steel access panels in the liner for access to valves
and fittings.

E. Baffles:

1\. Provide baffles to control air vectors into and through the fume
hood. Fabricate of the same material as the liner. All baffle
supports/brackets to be nonmetallic.

2\. Baffle designs which permit close‑off of all slots are
not acceptable.

3\. Must comply with OSHA Lab Standard Guidelines.

4\. Provide acid resistant label indicating proper baffle operation.
Locate label on sidewall of hood interior.

5\. Provide for baffle adjustment to allow repositioning prior to hood
operation permitting setting for (1) high thermal loading, (2) heavier
than air gases or fumes generated near work surface, and (3) normal or
average operation.

F. Work Surfaces:

1\. Type 304 stainless steel: 16 gage, welded seamless construction with
a raised 1/4 inch anti‑spill edge. Stainless steel, reinforced with
16 gage steel channels, with an overall thickness of 1 inch.

2\. Reinforce work surface to handle loads of 200 pounds per square
foot.

G. Sinks

1\. Cup sinks: Stainless steel

a\. Size: 4‑3/8 inches by 13‑3/4 inches by 5‑7/16 inches deep.

b\. Constructed of Type 304 stainless steel, minimum thickness 18 gage ,
Number 4 mil. polish finish. All joints butt welded and ground smooth.
Pitch bottoms to drain outlet.

c\. Screen: Type 316 stainless steel, 0.028 wire diameter, 8 by 8 mesh
per square inch.

d\. Provide swivel sink strainer adapter, Town & Country Plastics
Model PP‑18; R&G Sloane Part Number 7218; or Scientific Plastics
Company, Inc., Part Number 31595‑158.

H. Lighting:

1\. Fixture: 2 lamp, rapid start, UL listed fluorescent light fixture
with sound rated ballast installed on exterior of fume hood roof.
Provide safety glass panel cemented and sealed to the hood roof.

2\. Interior of fixture: White, high reflecting plastic enamel.

3\. Size: Largest possible up to 48 inches for hoods with
superstructures up to 6 feet. Provide (2) 36 inch fixtures for hoods
with 8 foot superstructures.

4\. Include lamps with fixtures.

5\. Illumination:  80 footcandle minimum.

6\. Lamps and ballast to be the same type as specified in
Division 16 for overhead lighting in laboratory spaces.

I. Electrical Power:

1\. Three wire grounding type receptacles rated at 120 VAC
at 20 amperes.

2\. Receptacles to be gray in color with stainless steel flush plates.

3\. Factory install receptacles, lighting, electrical fittings and
wiring in accordance with applicable codes and
Division 16 specifications.

4\. Provide a dedicated receptacle on top of hood for safety monitor
and alarm.

J. Service Fittings and Piping:

1\. Hoods shall be factory prepiped to a point of connection 2 inches
above the hood roof. Piping materials and installation for each type of
service shall be as specified under Division 15. Pressure test all
prepiped lines in the factory.

2\. Service fittings within fume hoods shall have color coded, acid and
solvent resistant plastic coating, applied over fine sandblasted
surface, properly cleaned. Surfaces to be coated shall be sprayed and
baked three times with minimum coating thickness of 6 mil.

3\. Remote Control Valves: Remote control valves shall be mounted on the
front panel of the fume hood, with all components subject to wear
accessible from the exterior of the hood. The valve stem shall be for
fume hoods with airfoil 45 degrees to the side wall of the fume hood.
The centerline of the valve inlet and outlet shall be parallel and
1‑1/8 inches apart. Valves shall have a threaded collar to hold the
valve in place.

4\. Color coding of hood interior service fittings and remote control
valves shall be as specified for Laboratory Service Fittings in the
Laboratory Casework and Furnishings Section of this Specification.

K. Exhaust Outlet:

1\. For hoods with stainless steel liners, 18 gage thick, Type 304
stainless steel collars welded in place.

2\. Provide exhaust duct transition from the hood rectangular exhaust
outlet to the building exhaust system round duct connection. Fabricate
transition of the same material as the exhaust outlet.

L. Safety Monitor/Alarm System:

1\. Each isotope hood shall be equipped with a safety alarm unit which
is to be provided under Division 15. Provide factory cut‑outs in the
front of the hood for field mounting of the unit. Coordinate location
and size of cut‑out with Division 15. Connection of safety alarm unit to
sensors and fans shall be under Division 15.

M. Safety Monitor/Alarm Systems:

1\. Provide fume hood monitor with audible and visual alarm signals to
activate if face velocity drops below 80 fpm or rises above 180 fpm.
Alarm setpoints to be field adjustable.

2\. Audible alarm signal tone shall be a minimum of 85 decibels at 10
centimeters. Visual alarm signal shall be a flashing or continuous
glowing red light. Alarm design shall permit silencing of tone signal,
but red visual signal light shall glow until unsafe condition is
corrected. Provide with circuitry and a pushbutton to test
alarm circuits.

3\. Monitor shall utilize thermal sensors, located in the monitor, to
determine hood face velocity.

4\. Provide with input/output accessory to send alarm signal to a remote
location and for silencing alarm remotely.

5\. Electrical: 9 volt DC, maximum of 1 amp. Provide 120 VAC to 9 VDC
transformer, UL listed.

N. Instruction Plate:

1\. Permanent 4 inch by 6 inch plate attached to fume hood exterior with
condensed information covering recommended locations for apparatus and
accessories, baffle settings, use of sash, and recommended safe
operating procedures.

2\. Provide a 4 inch by 6 inch corrosion resistant metal or plastic
frame attached to front face of fume hood exterior with plastic or glass
glazing to contain a removable data card to identify hood and show hood
characteristics and field test data.

O. Isotope Filter

1\. Stainless steel filter assembly with rough and HEPA filter. Housing
shall be stainless steel.

2\. Capacity: 1300 cfm at 1.6 inches static pressure with clean filters.

3\. Size: Overall dimensions shall be 24‑1/2 inches wide, 24 inches
high, 25‑1/4 inches deep, with a 12 inch diameter inlet and outlet.

4\. Provide manometer mounted on housing to indicate filter pressure
drop and report on filter condition.

5\. Each HEPA filter shall be tested and rated at 99.9 percent
efficiency, minimum for particles 0.3 to 0.5 microns in diameter.
Housing shall be stainless steel.

2.06 [WALK‑IN HOODS]{.underline}

A. Walk‑in fume hoods shall be as detailed on the Drawings and as
described under Article 2.03, Benchtop Chemical Fume Hoods, unless
modified under this Article.

B. Floor: Provide a removable stainless steel floor, Type 316, mounted
on marine plywood.

C. Support channels: Type 316 stainless steel as detailed.

2.07 [CANOPY HOODS]{.underline}

A. Fabricate of 18 gage thick, mild steel as detailed. Paint entire
hood. Color selected by Owner\'s Representative.

B. Fabricate, as detailed, of 18 gage thick, Type 304 stainless steel
with a Number 4 finish.

C. All exposed corners are to be welded and ground smooth.

D. Support from steel rods attached to structure above and from brackets
attached to adjoining wall. Refer to detail on Drawings.

2.08 [FUME HOOD METAL FINISH]{.underline}

A. Preparation: Spray clean metal with a heated cleaner/phosphate
solution, pretreat with iron phosphate spray, water rinse, and neutral
final seal. Immediately dry in heated ovens, gradually cool, prior to
application of finish.

B. Application: Electrostatically apply epoxy or urethane powder coat of
selected color and bake in controlled high temperature oven to assure a
smooth, hard satin finish. Surfaces shall have a chemical resistant,
high grade laboratory furniture quality finish of the
following thicknesses:

1\. Exterior and interior surfaces exposed to view: 1.5 mil average and
1.2 mil minimum.

2\. Surfaces not exposed to view: 1.0 mil average.

2.09 [SOURCE QUALITY CONTROL TESTING OF EPOXY RESIN
WORK SURFACE]{.underline}

A. Test procedure: Apply 5 drops of each reagent to surface and cover
with 25 mm watch glass, convex side down; test volatiles using 1 ounce
bottle stuffed with saturated cotton. After 24 hour exposure flush
surface, clean, rinse and wipe dry.

B. Evaluation ratings: Change in surface finish and function shall be
described by the following ratings:

1\. No Effect: No detectable change in surface material.

2\. Excellent: Slight detectable change in color or gloss, but no change
to the function or life of the work surface material.

3\. Good: Clearly discernible change in color or gloss, but no
significant impairment of work surface function or life.

4\. Fair: Objectionable change in appearance due to surface
discoloration or etch, possibly resulting in deterioration of function
over an extended period.

5\. Failure: Pitting, cratering or erosion of work surface material;
obvious and significant deterioration.

C. Test Results: Submit a report of the test results. The results shall
be equal to or better than the following:

**Reagent Rating**

1\. Hydrochloric Acid, 37 percent Excellent

2\. Sulfuric Acid, 33 percent No Effect

3\. Sulfuric Acid, 77 percent No Effect

4\. Sulfuric Acid, 96 percent Failure

5\. Formic Acid, 90 percent Excellent

6\. Nitric Acid, 20 percent Excellent

7\. Nitric Acid, 30 percent Excellent

8\. Nitric Acid, 70 percent Good

9\. Hydrofluoric Acid, 48 percent Fair

10\. Phosphoric Acid, 85 percent No Effect

11\. Chromic Acid, 60 percent Failure

12\. Acetic Acid, 98 percent Excellent

13\. 3 & 8 Equal Parts Excellent

14\. Ammonium Hydroxide, 28 percent No Effect

15\. Sodium Hydroxide, 10 percent No Effect

16\. Sodium Hydroxide, 20 percent No Effect

17\. Sodium Hydroxide, 40 percent No Effect

18\. Sodium Hydroxide Flake No Effect

19\. Sodium Sulfide Excellent

20\. Zinc Chloride No Effect

21\. Tincture of Iodine Excellent

22\. Silver Nitrate No Effect

23\. Methyl Alcohol No Effect

24\. Ethyl Alcohol No Effect

25\. Butyl Alcohol No Effect

26\. Benzene Excellent

27\. Xylene No Effect

28\. Toluene Excellent

29\. Gasoline No Effect

30\. Dichloroacetic Acid Good

31\. Dimethylformamide Excellent

32\. Ethyl Acetate No Effect

33\. Amyl Acetate Excellent

34\. Acetone Excellent

35\. Chloroform Excellent

36\. Carbon Tetrachloride No Effect

37\. Phenol Excellent

38\. Cresol Excellent

39\. Formaldehyde No Effect

40\. Trichlorethylene Excellent

41\. Ethyl Ether Excellent

42\. Furfural Good

43\. Methylene Chloride Excellent

44\. Monochlorobenzene Good

45\. Dioxane Excellent

46\. Methylethyl Ketone Excellent

47\. Acid Dichromate Fair

48\. Hydrogen Peroxide No Effect

49\. Naphthalene Excellent

2.10 [SOURCE QUALITY CONTROL TESTING OF POLY RESIN LINER]{.underline}

A. Test Procedure:

1\. Test Number 1 ‑ Spills and Splashes:

a\. Suspend in a vertical plane a 42 inch (horizontal) by 12 inch
(vertical) panel divided into 3/4 inch wide vertical columns.

b\. Apply 5 drops of each reagent listed with an eye dropper.

c\. Apply liquid reagents at top of panel and allow to flow down full
panel height. (CAUTION! Flush away any reagent drops.)

2\. Test Number 2 ‑ Fumes and Gases:

a\. Divide 24 inch by 12 inch panel into 2 inch squares.

b\. Place 25 milliliters of reagent into 100 milliliter beakers and
position panel over beaker tops in the proper sequence. Note: Beaker
pouring lip permits atmospheric oxygen to enter and participate in the
reaction of the reagent fumes.

3\. After 24 hours remove panel, flush with water, clean with naphtha
and detergent, rinse, wipe dry and evaluate.

B. Evaluation ratings: Change in surface finish and function shall be
described by the following ratings:

1\. No Effect: No detectable change in surface material.

2\. Excellent: Slight detectable change in color or gloss, but no change
to the function or life of the work surface material.

3\. Good: Clearly discernible change in color or gloss, but no
significant impairment of work surface function or life.

4\. Fair: Objectionable change in appearance due to surface
discoloration or etch, possibly resulting in deterioration of function
over an extended period.

5\. Failure: Pitting, cratering or erosion of work surface material;
obvious and significant deterioration.

C. Test Results: Submit a report of the test results. The results shall
be equal to or better than the following:

**Reagent List Test 1 Test 2**

**Concentrations by Weight Rating Spills Fumes**

1\. Sodium Hydroxide Flake No Effect No Effect

2\. Sodium Hydroxide, 40 percent Excellent No Effect

3\. Sodium Hydroxide, 20 percent Excellent No Effect

4\. Sodium Hydroxide, 10 percent Excellent No Effect

5\. Ammonium Hydroxide, 28 percent No Effect No Effect

6\. Methylene Chloride No Effect No Effect

7\. Chloroform No Effect No Effect

8\. Carbon Tetrachloride No Effect No Effect

9\. Trichlorethylene No Effect No Effect

10\. Monochlorobenzene No Effect No Effect

11\. Tincture of Iodine No Effect Good

12\. Methyl Alcohol No Effect No Effect

13\. Ethyl Alcohol No Effect No Effect

14\. Butyl Alcohol No Effect No Effect

15\. Phenol, 85 percent No Effect Excellent

16\. Cresol No Effect No Effect

17\. Sodium Sulfide, Saturated Good Excellent

18\. Furfural Good No Effect

19\. Dioxane No Effect No Effect

20\. Zinc Chloride No Effect No Effect

21\. Benzene No Effect No Effect

22\. Toluene No Effect No Effect

23\. Xylene No Effect No Effect

24\. Gasoline No Effect No Effect

25\. Naphthalene No Effect No Effect

26\. Methylethyl Ketone No Effect No Effect

27\. Acetone No Effect No Effect

28\. Ethyl Acetate No Effect Excellent

29\. Amyl Acetate No Effect No Effect

30\. Ethyl Ether No Effect No Effect

31\. Silver Nitrate, 10 percent Excellent No Effect

32\. Dimethylformamide No Effect No Effect

33\. Formaldehyde, 37 percent No Effect No Effect

34\. Formic Acid, 88 percent No Effect No Effect

35\. Acetic Acid, Glacial No Effect No Effect

36\. Dichloroacetic Acid No Effect No Effect

37\. Chromic Acid, Saturated Fair No Effect

38\. Phosphoric Acid, 85 percent Excellent No Effect

39\. Sulfuric Acid, 33 percent Excellent No Effect

40\. Sulfuric Acid, 77 percent Excellent No Effect

41\. Sulfuric Acid, 93 percent Excellent No Effect

42\. Hydrogen Peroxide, 30 percent No Effect No Effect

43\. Acid Dichromate Excellent Excellent

44\. Nitric Acid, 20 percent No Effect No Effect

45\. Nitric Acid, 30 percent No Effect No Effect

46\. 40 & 47 Equal Parts No Effect Excellent

47\. Nitric Acid, 70 percent No Effect No Effect

48\. Hydrofluoric Acid, 37 percent No Effect No Effect

49\. Hydrochloric Acid, 48 percent Excellent Excellent

2.11 [SOURCE QUALITY CONTROL TESTING OF FUME HOODS]{.underline}

A. Test one fume hood of each type and size specified in accordance with
the method prescribed in American National Standard
ANSI/ASHRAE 110‑1995. The minimum overall performance rating of each
test shall be 4.0 AM 0.05 with 4.0 equal to liters per minute of tracer
gas release, AM identifying an \"as manufactured\" test,
and 0.05 indicating the level of tracer gas control in parts
per million.

B. Hood test shall take place in the manufacturer\'s test facility with
testing personnel, samples, apparatus, instruments, and test materials
supplied by the manufacturer.

2.12 [SOURCE QUALITY CONTROL TESTING OF FUME HOODS]{.underline}

A. Submit a test report, for each type and size of hood, for the
standard product previously tested, if the product is identical to
equipment being provided for this project.

B. Evaluation of standard product shall have been conducted in the
manufacturer\'s test facility in accordance with the method prescribed
in ANSI/ASHRAE 110‑1985.

C. Hoods shall achieve a rating of 4.0 AM 0.05 PPM or better.

2.13 [SOURCE TESTING OF FUME HOOD SOUND LEVELS]{.underline}

A. Provide the following historic certified sound test data for each
size and type of fume hood:

1\. Background sound pressure level readings for the test facility with
exhaust system operating but without connection to the fume hood.

2\. A second set of readings recorded with the fume hood connected and
operating and the sensor located 36 inches in front of the
sash assembly.

3\. Certified report: Octave band sound pressure level, Db re 20 micro
Pa in the 31.5 to 8,000 Hertz frequency range, for the fume
hood operating.

[PART 3 -  EXECUTION]{.underline}

3.01 [INSTALLATION]{.underline}

A. Installation:

1\. Install fume hoods and equipment in accordance with
manufacturer\'s instructions.

2\. Install equipment plumb, square, and straight with no distortion and
securely anchored as required.

3\. Secure work surfaces to casework and equipment components with
material and procedures recommended by the manufacturer.

B. Accessory installation: Install accessories and fittings in
accordance with manufacturer\'s recommendations.

3.02 [FIELD QUALITY CONTROL TESTING OF FUME HOODS]{.underline}

A. Testing Requirements:

1\. Perform tests in field to verify proper operation of the fume hoods
before they are put in use, using only qualified personnel.

2\. Perform tests after installation is complete, the building
ventilation system has been balanced, all connections have been made,
and written verification has been submitted that the above conditions
have been met.

3\. Verify that the building makeup air system is in operation, the
doors and windows are in normal operating position, and that all other
hoods and exhaust devices are operating at designed conditions.

4\. Correct any unsafe conditions disclosed by these tests before
request of test procedures.

B. Testing Equipment:

1\. Properly calibrated hot wire thermal anemometer.

2\. Supply of 30 second smoke bombs.

C. Face Velocity Testing:

1\. Conduct tests in accordance with procedures as outlined
in SEFA‑1‑1992.

2\. Check room conditions in front of fume hood using a thermal
anemometer and a smoke source to verify that the velocity of cross
drafts does not exceed 20 percent of the specified average fume hood
face velocity. Eliminate any cross drafts that exceed these values
before proceeding.

3\. Perform the following test to verify conformance of actual fume hood
face velocities to those specified. With the sash in the open position,
as scheduled on the Drawings, determine the face velocity by averaging
the velocity of 6 readings taken at the fume hood face; at the centers
of a grid made up of 3 sections of equal area across the top half of the
fume hood face and 3 sections of equal area across the bottom half of
the fume hood face. If not in accordance with scheduled face velocities,
refer to manufacturer\'s Troubleshooting Guide for aid in determining
cause of variation in airflow.

4\. Check sash operation by moving sash through its full travel. Verify
that sash operation is smooth and easy, and that vertical rising sash
shall hold at any height without creeping up or down.

D. Smoke Testing:

1\. With sash in the open position check air flow into the fume hood
using a smoke source. Verify that air flow is into the fume hood over
the entire face area by a complete traverse of the fume hood 6 inches
inside the face. Reverse flow is evidence of unsafe conditions. Take
necessary corrective actions and retest.

2\. Move a lighted smoke bomb throughout the fume hood work area
directing smoke across the work surface and against the side walls and
baffle. Verify that smoke is contained within the fume hood and
rapidly exhausted.

3.03 [FIELD QUALITY CONTROL TESTING OF FUME HOODS]{.underline}

A. Refer to Division 15 specification sections for air balancing and
testing of fume hoods.

3.04 [ADJUSTING]{.underline}

A. Repair or remove and replace defective work, as directed by the
Owner\'s Representative upon completion of installation.

B. Adjust sash, fixtures, accessories and other moving or operating
parts to function smoothly.

3.05 [CLEANING]{.underline}

A. Clean equipment, touch up as required.

3.06 [PROTECTION OF FINISHED WORK]{.underline}

A. Provide all necessary protective measures to prevent damage to
equipment from exposure to other construction activity.

B. Advise Contractor of procedures and precautions for protection of
material and installed fume hoods from damage by work of other trades.

END OF SECTION