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reading low. A 6° F. discrepancy will give a 1% error.

3. Pump inlet pressure indicator is reading high. A 3.5 in. H20 high reading will give 1% error.

4. Background concentration reading is too low. Check analyzer zero. Check leakage at floor inlet.

5. Analyzer is reading high. Check span.

6. Barometer reading is in error (too high). Barometric pressure reading should be gravity and temperature corrected.

7. Revolution counter is reading high (Check pump speed and counters.)

8. Mixture is stratified causing the sample to be higher than the average concentration in the mixture. Negative Error (Indication is lower than true value) :

1. Calculated V, is less than actual Vo. a. Original calibration in error.

b. Pump clearances decreased due to influx of some surface adherent material. Recalibration may be needed.

2. Pump inlet temperature recorder is reading high.

3. Pump inlet pressure indicator is reading low.

4. Background concentration reading is too high.

5. Analyzer is reading low. 6. Barometer reading is in error (too low). 7. Revolution counter is reading low.

8. There is a leak into the sampling system. Pressure check the lines and fittings on the intake side of sample transfer pumps on both the CVS and analyzer console.

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°F 1.05 "Fluid + .05 "Fluid + .5 °F

o + .05 secs.


0-250 °F
0-36 "Fluid
0-36 "Fluid
0-250 °F
0-10,000 secs.


Note: Fluid used in 36 inch manometer should extend range to at least 0-60 "H20. Separate manometers for PPI and PPO may be used during

calibration. (38 FR 17167, June 28, 1973]

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SYSTEM The chemiluminescence method utilizes the principle that nitric oxide (NO) reacts with ozone (0) to give nitrogen dioxide (NO,) and oxygen (Og). Approximately 10 percent of the NO, is electronically excited. The transition of excited NO, to the ground state yields a detectable light emission (590630 nanometer region) at low pressures. The intensity of this emission is proportional to the mass flow rate of NO into the reactor. The light emission can be measured utilizing a photomultiplier tube and associated electronics.

The method also utilizes the principle that the thermal decomposition of NO, (2NO, → 2NO+0,) is complete at about 600° C. The rate constant for the dissociation of NO, at 600° C. is approximately 108 (liters/molesecond). A 6-foot length of one-eighth inch outside diameter, 0.028 wall thickness, flawless stainless steel tubing resistance heated using a low voltage, high current power supply to a temperature of 650° C. (1200° F.) provides sufficient residence time at a sample flow rate of 700 cc, per minute (1.5 c.f.h.) for essentially complete conversion of nitrogen dioxide to nitric oxide. Other converter designs may be used if shown to yield essentially 100 percent conversion of NO, to NO.

The method permits continuous monitoring of NOx concentrations over a wide range. Response time (2 to 4 seconds is typical) is primarily dependent on the mechanical pumping rate at the operating pressure of the reactor. The operating pressure of the reactor is generally less than 5 torr.

The following figure is a flow schematic illustrating one configuration of the major components required for the oxides of nitrogen analytical system.


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3. Choke mechanism.
4. Fuel system filter and fuel system lines

and connections.
5. Choke plate and linkage.
III. Ignition Components

1. Ignition timing and advance systems. 2. Distributer breaker points and con

denser. 3. Spark plugs. 4. Ignition wiring.

5. Operating parts of distributor. IV. Crankcase Ventilation System:

1. PCV valve.
2. Ventilation hoses.
3. Oil filler breather cap.

4. Manifold inlet (carburetor spacer, etc.). V. External Exhaust Emission Control Sys

tem: 1. Secondary air injection system hoses. 2. Air system manifolds. 3. Control valves and air pump. 4. Manifold reactors. 5. Catalytic mufflers. 6. Exhaust recirculation.

7. Water injection. VI. Evaporative Emission Control System:

1. Engine compartment hose connections. 2. Carbon storage media. 3. Fuel tank pressure-relief valve opera

tion. 4. Fuel vapor control valves. VII. Air Inlet Components

1. Carburetor air cleaner filter.
2. Hot air control valve.

B. Heavy Duty Diesel Engines.
I. Engine Mechanical Components:

1. Valve train.
2. Cooling system.

a. Coolant.
b. Thermostat.

c. Filter.
3. Lubrication.

a. Oil Filter.

b. Lubricant. II. Fuel System:

1. Fuel type. 2. Fuel pump. 3. Fuel filters. 4. Injectors.

5. Governor. III. Air Inlet Components:

1. Air cleaner.

2. Inlet ducting. IV. External Exhaust Emission Control

System: 1. Rack limiting devices (aneroid, throttle

delay, etc.). 2. Manifold reactor. 3. Catalytic mufflers. 4. Exhaust recirculation. 5. Water injection.


A. Gasoline Fueled Light Duty Vehicles and Heavy Duty Engines. I. Basic Mechanical Components-Engine:

1. Intake and exhaust valves. 2. Drive belts. 3. Manifold and cylinder head bolts. 4. Engine oil and filter. 5. Engine coolant. 6. Cooling system hoses and connections. 7. Vacuum fittings, hoses and connections. II. Fuel System 1. Fuel specification-octane rating, lead

content. 2. Carburetor-idle r.p.m., mixture ratio.




Sec. 104.1 Applicability. 104.2 Definitions. 104.3 Initiation of proceedings for confer

ences; appointment of Chairman. 104.4 Organization and general procedures

of the conference. 104.5 Notice of conference. 104.6 Service. 104.7 Publication of notice. 104.8 Parties. 104.9 Presentation of material by the En

vironmental Protection Agency. 104.10 Conference procedure. 104.11 Record of proceedings. 604.12 Preparation, publication, and pro

mulgation of water quality standards; effective date; petition for

public hearing. 104.13 Initiation of proceedings for water

quality public hearings; appoint

ment of Hearing Board. 104.14 Organization and general procedures

of the Hearing Board. 104.15 Notice of hearing. 104.16. Service. 104.17 Publication of notice. 104.18 Parties. 104.19 Presentation of standards and sup

porting material by the Environ

mental Protection Agency. 104.20 Hearing procedure. 104.21 Record of proceedings. 104.22 Oral argument. 104.23 Final findings and recommendations. 104.24 Notification of alleged violators of

water quality standards. AUTHORITY: The provisions of this part 104 Issued under sec. 10, 70 Stat. 506, as amended; 33 U.S.C. 1160. Interpret or apply sec. 10 (c), 79 Stat. 908, 33 U.S.C. 1160(c).

SOURCE: The provisions of this part 104 appear at 3€ F.R. 22480, Nov. 25, 1971, unless otherwise noted. 8 104.1 Applicability,

The provisions of this part apply to proceedings under section 10(c) (2), (4), and (5) of the Federal Water Pollution Control Act, as amended (79 Stat. 908; 33 U.S.C. 1160(C) (2), (4), and (5)). $ 104.2 Definitions.

(a) “Act” means the Federal Water Pollution Control Act, as amended (33 U.S.C. 1151 et seq.).

(b) "Chairman” means the Chairman appointed by the Administrator to conduct the conference pursuant to section 10(c) (2) of the Act (33 U.S.C. 1160(c) (2)).

(c) “Agency" means the Environmental Protection Agency.

(d) “Administrator" means the Administrator of the Environmental Protection Agency.

(e) “Assistant Administrator for Media Programs" means the Assistant Administrator for Media Programs in the Environmental Protection Agency.

(f) “Deputy Assistant Administrator for Water Programs" means Deputy Assistant Administrator for Water Programs in the Environmental Protection Agency.

(g) "Water Quality Standards" mean water quality criteria applicable to specific interstate waters and a plan for the implementation and enforcement of such criteria, all of which shall be such as to protect the public health or welfare, enhance the quality of water and serve the purposes of the Act, taking into consideration the use and value of such waters for public water supplies, propagation of fish and wildlife, recreational purposes, and agricultural, industrial and other legitimate uses.

(h) The definitions of terms contained in subsection 10(j) and section 23 of the Act shall be applicable to such terms as used in this part unless the context otherwise requires. § 104.3 Initiation of proceedings for

conferences; appointment of chair.


(a) In any case where the Administrator finds that the conditions precedent to his establishment of water quality standards exist, he will give notice of his intention to do so and call & conference in connection therewith. He may fix the time and place of such conference in his notice of intention to establish water quality standards or he may authorize his designee to do so.

(b) The Chairman of such conference shall be the Administrator, or the Assistant Administrator for Media Programs, or the Deputy Assistant Administrator for Water Programs, in the Environmental Protection Agency or such other employee of that Agency as the Administrator may appoint.

§ 104.4 Organization and general pro

cedures of the conference. (a) The Chairman shall convene the conference and schedule such other meetings as may be necessary, including meetings for the settlement or simplification of issues.

(b) The Chairman shall preside at all conference sessions and meetings called by him.

(c) The conference shall be conducted in an informal but orderly manner in accordance with this part. Questions of procedure during a conference shall be determined by the Chairman.

(d) The Office of Water Programs in the Environmental Protection Agency shall provide such clerical and technical assistance as may be necessary.

(e) The Chairman shall maintain and have custody of all oficial records and documents pertaining to the conference and shall perform such other duties related to the functioning of the conference as may be necessary.

(f) The Chairman shall execute, issue or serve such notices, reports, communications, and other documents relating to the functions of the conference as he may deem proper. § 104.5 Notice of conference.

(a) The Administrator or the Assistant Administrator for Media Programs or the Deputy Assistant Administrator for Water Programs shall issue and serve notice of a conference as herein provided including the time and place of the conference.

(b) The notice of conference shall briefly describe the location and nature of the interstate waters to be covered by the conference.

(c) The notice shall include the name of the Chairman before whom the conference will be conducted upon a day and at a time and place specified not earlier than thirty (30) days after the service of the notice.

(d) Notice of the conference shall be served on representatives of Federal departments and agencies, interstate agencies. States, municipalities, and industries the Administrator, the Assistant Administrator for Media Programs or the Deputy Assistant Administrator for Water Programs has reason to believe are contributing to, affected by, or have an interest in water quality standards

for the waters to be covered by the conference. $ 104.6 Service.

Notice of the conference may be served by mailing a copy thereof to each person, department, or agency to be served at their residence, office or place of business as ascertained by the Administrator, the Assistant Administrator for Media Programs or the Deputy Assistant Administrator for Water Programs, as the case may be. Service by mail is complete upon mailing. $ 104.7 Publication of notice.

Notice of the water quality standardssetting conference shall be published in the FEDERAL REGISTER at least thirty (30) days prior to the conference. $ 104.8 Parties.

(a) The parties to a conference shall include the persons, departments, and agencies specified in § 104.5(d).

(b) The Chairman shall have all the rights of a party to the conference.

(c) Upon application and good cause shown, the Chairman may permit any interested Federal departments and agencies, interstate agencies, States, municipalities, industries or other persons to appear at the conference and be admitted as parties to such extent and upon such terms as the Chairman shall determine proper.

(d) Any party may appear in person or by counsel.

(e) The failure of any party to file an appearance or appear at the conference in response to the notice of conference shall not delay the conference and the Chairman shall proceed, hear, receive statements, make determinations and take other appropriate action affecting such party. $ 104.9 Presentation of material by the

Environmental Protection Agency. The Administrator, the Assistant Administrator for Media Programs or the Deputy Assistant Administrator for Water Programs shall arrange for the presentation of material concerning the quality of waters to be covered by the conference, the uses, both existing and potential, of such waters, the criteria necessary to protect such uses, the person or persons, if any, contributing or discharging any matter affecting the quality of such waters, and remedial

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