40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 TM    5-6630-215-12 Table  3-1.  Operator  Preventive  Maintenance  Checks  and  Services  -  Continued NOTE: Within  designated  interval,  these  checks  are  to  be  performed  in  the  order  listed. B - Before D - During A - After W - Weekly M - Monthly OTHER REA- GENT  IN WQAS - P.M. (fig. 1-5) Fluoride Solution, Standard SPADNS  Reagent Ferrous  Iron  Re- agent  Powder Pillows Indicator, Solu- tion, pH Wide Range Nitrate  Test  Re- agent  Powder Pillows Nesslers  APHA Test Solution Salt, Solution, Rochelle Sulfate  Test Powder   Pillows Thermometer Micro  Pipet,  glass Volumetric   Trans- fer Pipet (2) Flask, glass 25 ml Cylinder,  Grad, 25 ml (2) Brush,  Test  Tube SPECTROPHOTO- METER,  MULTI- PURPOSE  (figs. 2-11 and 2-12) Case Battery,  Dry  Cell. 1.5V, Size D Scale,  pH,  Wide Range Scale, Fluoride Scale,  Iron Visual  Inspection  of 1 - Cases, fittings & inserts for function. Patch or re- place. 2 - Lab-ware. Broken units are  to  be  replaced. 3 - Shelf life. If expired, re- tain  for  identfication  only. Replace. 4 - Containers for leakage and function. Clean up. Tighten  caps.  Replace. Visual inspection 1 - Less than the quantity of any type of reagent list- ed in Appendix C, required to perform function; or, not of effective shelf life. 2 - Leakage of any contain- er  is  evident  (until  cleaned up  and  replaced). 3 - Lab-ware is broken or missing to an extent that accurate  measurements cannot be made. 4  -  Environmental  exposure has been such that contain- ers or contents are unre- liable. 1 - Meter is not intact. 2 - Batteries not sealed, batteries   deteriorated. 3 - Scales: there is not at least 1 good scale of each type (scales must not be marred  or  damaged) 4 - Meter not operative. 3-5