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. Section No 13 <br /> Revision No 0 <br /> Date September 5, 1991 <br /> Page 3 of 3 <br /> ■ Columns will be routinely checked by performance and operating <br /> conditions. <br /> s Compressed gas cylinders shall be checked and replaced when less <br /> than 500 psi of pressure is present <br /> ■ Temperatures of the injector, detector and column shall be routinely <br /> checked <br /> ■ The paper supply in the computer printer/integrator shall be <br /> routinely checked <br /> 13 2 Laboratory <br /> Laboratory preventative maintenance procedures are described in the <br /> respective laboratory QAPPs <br /> 13-3 <br />