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i • <br /> Measure Heart Rate (HR). The heart rate shall be measured by the radial pulse, for 30 <br /> seconds, as early as possible in the resting period. The HR at the beginning of the rest <br /> period shall not exceed the established maximum rate. The maximum heart rates <br /> measured immediately after a work cycle shall not exceed an individual's maximum-age- <br /> adjusted heart rate [(0.7) (220-age)] and shall not exceed 150 percent of the resting heart <br /> rate of 110 beats/minute. If the HR is higher, the next work period shall be shortened by 33 <br /> percent, while the length of the rest period stays the same. If the pulse rate still exceeds <br /> 110 beats/minute at the beginning of the next rest period, the following work cycle shall be <br /> further shortened by 33 percent. The procedure is continued until the rate is maintained <br /> below the established maximum. <br /> Manage Work/Rest Schedule. The following work/rest schedule may be used as a <br /> guideline: <br /> Active Work Time (min/hr) <br /> Adjusted Temperature Using Level B/C/D Protective Gear <br /> Degrees (F) Without Cooling Provisions <br /> B C D <br /> 85 or less 30 50 60 <br /> 90 30 40 60 <br /> 95 30 30 50 <br /> 100 20 20 50 <br /> 105 10 10 45 <br /> 110 0 0 0 <br /> Calculate the adjusted temperature: <br /> T (adjusted) = T (actual) + (13 x fraction sunshine) <br /> Measure the air temperature with a standard thermometer. <br /> Estimate fraction of sunshine by judging what percent the sun is out: <br /> 100% sunshine = no cloud cover = 1.0; <br /> 50% sunshine = 50% cloud cover = 0.5; <br /> 0% sunshine = full cloud cover = 0.0. <br /> Workers who are required to wear protective clothing may be required to adjust work <br /> activities according to the following work cycle schedule that is based on the adjusted <br /> temperature (T adj = T actual + 13 x Fraction Sunshine). In addition, workers required to <br /> utilize Level B SCBA equipment shall be reminded that the average maximum work time is <br /> approximately 30 minutes based upon the compressed air volume within the SCBA, and <br /> removal of this ensemble plus decontamination must be incorporated in the work time <br /> when calculating work/rest schedules. <br /> ENV~ 13 February 2005 <br /> A M E R 1 C A P:\PG&E\PGE-05-01 Stockton MW26R Investigation\MW26 Work Plan\H&S\H&S Plan-2005.doc <br />