ARCHIVED REPORTS_XR0011586 - Laserfiche WebLink

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i 3. Borings emitting excessive VOC concentrations will be ventilated, capped, or shut in as necessary. 4. Contaminated soil will be covered with clean soil and/or sprayed with water or deodorizing chemicals in order to reduce vaporization of VOC. 5. Drilling equipment will be bonded and grounded during the operations to control ignition sources. 7.4 ENGINEERING CONTROLS Access to work areas will be limited by the SSO to essential personnel. Drilling areas will be cordoned off with delineators, barriers, and/or taping. Excavated soil will be stockpiled and covered, or stored in closed drums or roll-off bins. Purged water will be stored in closed drums. Drums and/or roll-off bins containing soil or water will be clearly labeled. Hydrocarbon-affected soil or water will be removed from the site at the earliest opportunity. 7.5 PERSONAL PROTECTIVE EQUIPMENT Field personnel involved in site assessment and remediation are required to be prepared with the following personal protective equipment: • Hard hats . 0 Half-face air purifying respirators with organic vapor cartridges and dust/mist filters • Safety glasses with side-shields, or splash goggles • Tyvek coveralls and other suitable work clothing • Chemical-resistant gloves • Steel-toe boots or boot covers • Ear plugs or other suitable hearing protection • Traffic safety vests 7.6 PROTECTION FROM AIRBORNE TOXIC CHEMICALS Workers will be required to wear half-face air purifying respirators with organic vapor cartridges under the following circumstances: 1. If the worker is continuously exposed throughout the day to VOC vapors that exceed the permissible exposure level - time-weighted average(PEL-TWA) for gasoline (300 ppm). 2. If the worker is exposed at any time to VOC vapors that exceed the permissible exposure level - short-term exposure limit (PEL-STEL) for gasoline (500 ppm). Similar precautions will be taken with regard to other toxic chemicals, such as BTEX components. If VOC vapors exceed 1,000 ppm, full-face air purifying respirators with organic vapor canisters will be worn.