Appendix L
Maintenance Level Guidelines
Table 1 Wind Chill Chart (updated 3/2021)
Table 2 Recommended Work/Warm-up Schedule for Four Hour Shift
Air Temperature- Sunny Sky
No Noticeable Wind
5 mph Wind 10 mph Wind 15 mph Wind 20 mph Wind
o F (est.) -15 to –19 -20 to –24 -25 to –29 -30 to –34 -35 to –39 -40 to –44 -45 & below
o C (est.) -26 to –28 -29 to –31 -32 to –34 -35 to –37 -38 to –39 -40 to –42 -43 & below
Max. Work Period Norm. Breaks Norm. Breaks
# of Breaks
Max. Work Period
# of Breaks
Max. Work Period
# of Breaks
Max. Work Period
# of Breaks
Max. Work Period
# of Breaks
1 Norm. Breaks
1 75 min 2 55 min 3 40 min 4
1 75 min 2 55 min 3 40 min 4 30 min 5
75 min 2 55 min 3 40 min 4 30 min 5
XXX XXX
55 min 3 40 min 4 30 min 5
XXX XXX XXX XXX
40 min 4 30 min 5
XXX XXX XXX XXX XXX XXX
30 min 5
XXX XXX XXX XXX XXX XXX XXX XXX
XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX= Non-Emergency Work Should Stop
6-5
450 Naperville Park District | 2023 MASTER PLAN
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