Los Angeles County Municipal Code Part II General Requirements

When the space under, above, behind or beside duct systems must be regularly cleaned, a clear space of at least six (6)

inches for cleaning or maintenance shall be provided.

Where materials may accumulate in an approximately horizontal duct and thereby reduce the system's efficiency

significantly below design requirements, access openings for cleaning shall be provided therein at least every ten (10) feet in ducts smaller than one hundred and ninety (190) square inches in cross sectional area and at least every twenty (20) feet in larger ducts.

Suitable shut-off devices or caps shall be installed on all openings to the system which are not intended and used for

ventilation and such openings shall be kept closed except when in actual use for access or maintenance.

Section 3. - Confined Space

Whenever a worker enters a confined space or works where concentrations of gases, vapors, dusts, mists, fumes or

smoke are likely to produce conditions potentially hazardous to health, the following shall apply.

Lines which may convey toxic substances to the confined space shall be disconnected and "blinded off" or other

positive means shall be used to prevent such substances from entering the confined space while occupied by workers.

Before entering the confined space it shall be emptied, flushed and purged of toxic substances. Workers entering such

space shall be adequately protected by one of the following means,

(a)

Approved oxygen or supplied air respiratory equipment.

(b)

If respirators other than described in 3.4(a) are used, they be approved and sufficient make-up air shall be continuously supplied to mitigate any potential hazard due to oxygen deficiency or excess contamination as stated on the canister. Appropriate tests shall be made prior to entering and while working in confined spaces.

(c)

In addition to (a) and (b) above, workers shall be provided with such protection as may be necessary to prevent a health hazard from contact or by skin absorption.

Persons entering tanks, vessels or confined spaces shall wear an approved safety belt with a life line attached, or

another approved device shall be used. At least one person shall be able and ready to give assistance in case of emergency and shall stand by on the outside when any person is on the inside. When conditions require the wearing of respiratory equipment in a confined space, the person ready to give assistance shall have such approved respiratory equipment instantly available.

All work periods in a confined space shall be only as long as the worker can reasonably endure such conditions without

serious discomfort and without hazard to health.

Section 4. - Illumination.

For purposes of this code, the recommended lighting standards should conform with those recommended and approved

September, 1962 by the Illuminating Engineering Society

Section 5. - Non-ionizing Radiation

Section 6. - Protection Against Light Radiation

All employees who are engaged in gas or arc cutting and welding or similar operations employing fuel gas torches or

electric arc equipment and other employees who are in the immediate vicinity of such operations and exposed to radiant energy, heat energy or excessive brightness shall be shielded or be provided with and required to wear properly shaded goggles for eye protection or face masks or helmets equipped with properly shaded eye protection to protect the exposed portions of the face.

Where practicable, permanent or portable shields or curtains shall be provided that will surround the actual operations

sufficiently to shield other employees in the area from the rays. Where such shields are employed, they shall be made of fire resistive materials or may be of heavy canvas construction treated with fire resistive solutions. Such curtains or enclosures shall be open at the bottom and only high enough to accomplish their purpose without unduly interfering with the general ventilation of the area.

Employees exposed to radiant energy from gas cutting, welding, flame heating and hardening and brazing operations

shall be provided with and required to wear properly fitted and shaded goggles to protect the eyes, and such goggle protection devices which meet the minimum current requirements of the United States of American Standards Institute Safety Code Z2-1-1959 shall be deemed compliance with this rule.

Employees directly engaged in arc cutting and welding shall be provided with and required to use a shield or helmet that

protects the face; such shield or helmet shall be provided with one or two windows and fitted with the proper shaded glass for eye protection. Such shields and helmets which meet the minimum current requirements of the United States of America Standards Institute Safety Code Z2-1-1959 shall be deemed compliance by the employer with this rule. Helpers or other employees in the immediate vicinity of such operations, but not necessarily exposed to skin injuries due to radiation, shall be provided with and required to wear properly shaded goggles to protect the eyes against radiation; such goggles which meet the minimum requirements of the United States of America Standards Institute Safety Code Z2-1-1959 shall be deemed compliance by the employer with this rule.