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LU%WF-R5E 5F <br /> P.11,119 <br /> NOW %001 <br /> approximately 30 foot intervals if necessary (R�c+ord the new monitoring <br /> locations on a site map). Obtain and record OVM measurements at breathing <br /> zone and at ,ground level (approximately 6" above ground level) at all points. <br /> If OVM reading is at a high level (off scale), use L.E.L. instrument to measure <br /> vapor concentration. No machinery, VETs or air compressor should be <br /> operating. Record time, location, measurement reading, and wind direction. <br /> 3. Adjan Lmlsfor Monko-du Molts <br /> Equipment: OVM and Explosimeter <br /> Action Level: OVM reading of 5 ppm; explosimeter reading of 193% <br /> Oxygen, 10% LEL for gasoline <br /> At sea level, ambient air contains 210 oxygen by volume- If on-site <br /> measurements indicate lass than 19.5% oxygen, field personnel will exit the <br /> site to obtain supplied air respiratory protective equipment. <br /> Action (type and duration): Upgrade personal protection to Level C when <br /> OVM reading exceeds 5 ppm in breathing zone of site workers. Upgrade <br /> personal protection to Level B when QVM or outer instrument indicates <br /> greater than 5 ppm TP I-gas in breathing zone. Record all changes in PPE and <br /> monitoring equipment readings in site safety log. <br /> if wind direction has changed since prior measurement, adjust upwind <br /> monitoring points as discussed in Wind Direction and Air Monitoring. <br /> Monitor OVM in both breathing zone and ground level at a frequency of once <br /> every 3o minutes for first one hour period. If any OVM reading is greater <br /> than 100 ppmv or if wind direction changes during the first hour, continue <br /> subsequent monitoring at this frequency (every 30 minutes). If law <br /> measurable readings on OVM (reading below 100 ppmv) and wind direction <br /> is ste$dy, then change monitoring frequency to hourly and continue to end of <br /> day. <br /> iLexel of Protection: B <br /> Procedures: . <br /> (1) Stop work. <br /> (2) Evacuate work zone. <br /> (3) Call Project Manager (PM) (of office manager if project manager Is <br /> unavailable) to inform of the change in site conditions. <br /> (4) Suit up in a self-contained breathing apparatus (full face respirator & <br /> tyvek swt). <br /> [cover"gnviffon tnl Wtst CVC Ik\NI:OF CMRP-PSAPROATRACY PH3\H&S F 4N <br /> roc 5 <br />