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B. All water mains shall maintain a minimum 6" vertical clearance between storm <br /> sewer, vacuum sewer system and gravity sewer with 12" vertical clearance <br /> preferred. A 12" vertical clearance shall be maintained between all water mains <br /> and pressure sewer systems, stormwater force mains and reclaimed water <br /> mains. <br /> END OF SECTION <br /> 14 - 9 <br /> l a3.0. 10. <br />