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Licensed for the sole use of the purchaser. See license agreement penalties for distribution. CGA G-1.8-2017 COMPRESSE0 GAS ASSOCIATION, INC. PAGE 5 7 Lime pond operation and maintenance 7.1 Security and posting Carbide lime ponds should be secured by a fence.The fence should comply with CGA P-50, Site Security Stand- ard[9].The perimeter fence protecting the pond should be conspicuously posted with weatherproof signs stating the following (or equivalent wording): PRIVATE PROPERTY NO TRESPASSING KEEP OUT NO DUMPING Inside the perimeter fence, adjacent to the actual lime pond or ponds, signs stating the following (or equivalent wording) should also be posted: CARBIDE LIME CAN CAUSE BURNS TO THE SKIN OR EYES IF CONTACTED. KEEP OUT! All signs should be legible and clearly visible from all approaches to the lime pond area. Carbide lime handling areas also should be posted with signs reading (or equivalent wording): NO SMOKING or NO OPEN FLAMES Small amounts of acetylene gas,which can emanate from lime discharged from the acetylene generator, can be ignited by any ignition source. This is due to small amounts of unreacted calcium carbide and from acetylene dissolved in water. Such after-generation of acetylene gas dissipates within several hours. 7.2 Safe handling All personnel working with or near carbide lime should wear eye protection with side shields. In areas where splashing of lime slurry is likely to occur, chemical splash goggles and a full-face shield should be worn for additional protection. Personnel should wear long-sleeved shirts and long trousers. Proper gloves and footwear (leather for dry lime material or rubber for lime slurry) should also be worn. Where exposure to dry carbide lime or lime dust is possible, an approved nuisance dust respirator should be worn. Clothing contaminated with lime, including gloves and shoes, should be removed as soon as possible and flushed with water to remove lime residue, which can cause injury to the skin. For additional information an personal protective equipment, see G-1.5 [4]. All areas where carbide lime is handled should have an approved and easily accessible eye wash and safety shower. Spare safety glasses, face shields, and dust respirators should be available for visitors or in case of damage to workers' gear. Ali employees and contractors should be trained in the hazards of carbide lime including a review of the supplier's safety data sheet. All such training shall be documented. 7.3 Lime pond integrity 7.3.1 Maintaining freeboard It is important to maintain at least 1 ft (0.3 m) of freeboard below the top of the lime pond berm to contain and prevent escape of lime to the environment. Depending on the pond's location and climate, the height of the freeboard may be increased where appropriate. Lime ponds should be inspected regularly to verify containment of lime. This document licensed for the sole use of the purchaser. It may not be shared with any other person or used after the expiration date without the express written permission of the CGA. Any unauthorized use, reproduction, distribution, or modificat€on of this printed page will result in a$5,000 liquidated damages fee plus loss of access to CGA publications for one year for your company.