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7.9. During Tank Entry 7.9.1. General 7.9.1.1. Wear goggles, dust mask and hearing protection when cutting or grinding fiberglass. , 7.9.1.2. Wear chemical-resistant gloves and protective coveralls to prevent contact with chemicals, including resin and catalyst. 7.9.1.3. Continuously vent the tank with an air-driven (pneumatic) venturi during the entire time authorized tank entrants are inside the tank. Never enter a tank unless a venturi is securely attached to the tank and it is operating effectively. 7.9.1.4. Wear an organic vapor cartridge respirator at all times unless the tank has been completely emptied of product, double rinsed (at a minimum) and the residue removed, or, unless atmospheric testing has confirmed that toxic-vapor levels are below the exposure levels (listed in Table 2) requiring respiratory protection. 7.9.1.4.1. Conduct styrene testing when it is believed concentrations are at their highest. 7.9.1.5. Use only air-driven (pneumatic) powered tools. 7.9.1.6. Run air-monitoring equipment continuously in the immediate areas you will be working. 7.9.1.7. Use an adequate amount of artificial light inside the tank. 7.9.2. Attendant Responsibilities 7.9.2.1. Keep track of the identity and number of authorized tank entrants in the tank. 7.9.2.2. Monitor activities in and around the tank and stay alert to potential hazards that might compromise the authorized tank entrants' safety. i 7.9.2.3. Maintain continuous contact with those inside the tank for the duration of the tank entry. 7.9.2.4. Order an evacuation from the tank if any of the following conditions arise: 7.9.2.4.1. if you observe processes or procedures not allowed by the permit; 7.9.2.4.2. if you notice authorized tank entrant behavioral changes such as euphoria, dizziness, nausea or giddiness that might result from oxygen deficiency or exposure to solvent vapors; 30