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Arcadis Heat Illness Prevention Plan (HIPP) <br />HASP Supplement <br />Suggested Frequency and Duration of Work / Rest Cycles Applying Physiological Monitoring <br />of Acclimatized Personnel <br />Adjusted Temp. (1)Permeable PPE (2)Impermeable PPE (3) <br />> 90° F / 32° C After ea. 45 mins. of work After ea. 15 mins. working <br />77.5-82.5° F / 25.3-28.1° C After ea.120 mins. of work After ea. 90 mins. Working <br />72.5-77.5° F / 22.5-25.3° C After ea.150 mins. of work After ea. 120 mins. Working <br />87.5-90° F / 30.8-32.2° C After ea. 60 mins. of work After ea. 30 mins. Working <br />82.5-87.5° F / 28.1-30.8° C After ea. 90 mins. of work After ea. 60 mins. Working <br />Body Temperature Monitoring <br />Use an oral, inner ear, or an infrared type thermometer to measure the body temperature at the end of <br />the work period (If using an oral thermometer record temperature before drinking liquids). <br /> - If oral temperature exceeds 99.6°F (37.6°C), shorten the next work cycle by one-third <br />without changing the rest period. <br />- If oral temperature still exceeds 99.6°F (37.6°C) at the beginning of the next rest <br />period, shorten the following work cycle by one-third. <br />- Do not permit a worker to wear a semi-permeable or impermeable garment when <br />his/her oral temperature exceeds 100.6 °F (38.1 °C). <br />NOTES: <br />(1) Adjusted air temp (ta adj) calculation: ta adj F = ta F + (13 x % sunshine). Measure the air <br />temperature (ta) with a thermometer (shielded from radiant heat). Estimate the percent sunshine by <br />judging what percent time the sun is not covered by clouds <br />that are thick enough to produce a shadow. (100 percent sunshine = no cloud cover and a sharp, <br />distinct shadow; 0 percent sunshine = no shadows.) <br />(2) Permeable PPE consists of cotton clothing with long sleeves and pants or breathable coveralls. <br />(3) Add 1.8 °F for Tyvek coveralls; add 5.4 °F for heavy clothing; add 19.8 °F for impermeable/semi- <br />impermeable PPE - Level A/B suits) <br />Heart Rate Monitoring <br />When conducting heart rate monitoring, first record a resting heart rate to establish the individuals <br />daily baseline heart rate. Count the radial pulse (located on the inside of the wrist below the thumb) <br />during a 30 second interval before the start of work to establish a baseline heart rate. During rest <br />cycles count the heart rate as early as possible at the beginning of the rest cycle and again 3-5 <br />minutes later. The heart rate should fall and soon approach the individuals baseline heart rate. <br /> - If the heart rate exceeds 110 beats per minute at the beginning of the rest period, <br />shorten the next work cycle by one-third and keep the rest period the same. <br /> - If the heart rate still exceeds 110 beats per minute at the next rest period, shorten the <br />following work cycle by one-third. <br />Rev 8 13 June 2019