TM 10-6630-245-13&P Table 2-1.  Preventive Maintenance Checks and Services for WQAS-PM - Continued. Location Item Item To Be No. Interval Check/Service Procedure Not Fully Mission Capable If: 6 After Test Kit, Dissolved g.  Inspect Thiosulfate Standard Solution g.  Bottle less than 25% full.  Shelf life Oxygen for quantity, current shelf life, leaking expired.  Leakage is evident (until (continued) container, readable label. cleaned up and replaced).  Contents unidentifiable. 7 After Test Kit, Zinc       a.  Inspect case and foam for function.     a.  Use or environmental exposure has made case or contents unreliable. b.  Inspect color comparator, two b.  Labware is broken or missing to the measuring spoons, two comparison extent that you can't make accurate tubes, and pipet for cracks, breakage, measurements. damaged measurement markings.  Make sure labware is clean and dry. c.  Inspect Zinc Conditioning Reagent for c.  Bottle less than 25% full.  Shelf life quantity, current shelf life, leaking expired.  Leakage is evident (until container, readable label. cleaned up and replaced).  Contents unidentifiable. d.  Inspect Zinc Reagent for quantity, d.  Bottle less than 25% full.  Shelf life current shelf life, leaking container, expired.  Leakage is evident (until readable label. cleaned up and replaced).  Contents unidentifiable. e.  Inspect Deionized Water for quantity, e.  Less than one full bottle.  Shelf life current shelf life, leaking container, expired.  Leakage is evident (until readable label. cleaned up and replaced).  Contents unidentifiable. 8 After Spectrophotometer    a.  Inspect case and fittings for function.   a.  Use or environmental exposure has made equipment unreliable. b.  Make sure unit is clean and dry. c.  Make sure sample cells are clean and dry. d.  Inspect meter for damage, function.     d.  Meter not intact or meter not operating. e.  Inspect pH wide range meter cards for e.  There is not at least one unmarred, damage. undamaged scale. f.  Inspect fluoride meter cards for f.  There is not at least one unmarred, damage.   undamaged scale. g.  Inspect iron meter cards for damage. g.  There is not at least one unmarred, undamaged scale. h.  Inspect nitrogen ammonia meter cards h.  There is not at least one unmarred, for damage.                               undamaged scale. i.  Inspect nitrogen nitrate meter cards for i.  There is not at least one unmarred, damage.                                   undamaged scale. j.  Inspect sulfate meter cards for damage.   j.  There is not at least one unmarred, undamaged scale. 2-8