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1 <br />erosion, and deterioration. The tank <br />bottom will be visually checked to detect <br />deterioration, erosion, cracks, and general <br />integrity. Particular attention will be <br />given to tank surfaces around inlet piping <br />for evidence of erosion. <br />Nondestructive (ultrasonic) tank wall <br />thickness measurements will be taken and <br />recorded. Nondestructive (ultrasonic) pipe <br />testing will be conducted once every two <br />years at random locations on accessible <br />piping to determine if wall thinning is <br />occurring. Particular attention will be <br />given to elbows and bends, which are <br />susceptible to internal wear and erosion. <br />Any and all defects observed during the <br />inspection will be immediately reported to <br />the technical director for correction. <br />7.26 Inspection of Emergency Equipment. This section <br />will address the frequency and type of inspections to <br />be conducted in regard to communication and alarm <br />systems, fire extinguishing equipment, safety <br />equipment, and spill control equipment. <br />At least once each month, all portable fire <br />extinguishers on site will be visually inspected <br />in accordance with OSHA Standard 29 CFR <br />1910.157(e)(2), NFPA Standard 10 entitled <br />"Standard for Portable Fire Extinguishers." <br />These monthly inspections will determine if all <br />extinguishers are in their designated places, if <br />each such extinguisher is clearly visible, if the <br />operating instructions on each extinguisher are <br />legible, if any seals or tamper indicators are <br />broken or missing, if any signs of physical <br />' <br />damage, corrosion, leakage, or clogged nozzels <br />are obvious, and if pressure gauge readings are <br />in operating ranges. <br />At least annually, each portable fire <br />extinguisher will be subjected to an annual <br />maintenance check. <br />At least once each month, all protective <br />equipment maintained on site (protective suits, <br />gloves, boots, face shields, respirators, etc.) <br />will be inventoried and checked for full <br />operational status. <br />Communications and alarm systems will be <br />inspected and tested for proper functioning, at <br />monthly intervals. <br />33. <br />