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Safety Shooter process would protect the worker adequately NIOSH respirators my entire career is proof that during an 8-hour work day. The double rubber it pays off in the long run. band paper mask meets OSHA and NIOSH This article is not intended to make everyone minimum requirements. (N series is for environ- go out and buy half-mask respirators. It is ments free of oil aerosols, R series is resistant intended to make you aware that as long as your to oil mist for up to an 8-hour shift, and P series workers are wearing N-95 rated masks, you is oil proof with time use restrictions specified have met the minimum requirement. Remember by the manufacturer.) that different environments and projects may One problem with the double rubber band dust require the use of half masks with certain car- masks is when the worker breathes; the exhaust tridges or air-fed masks. In some cases, it’s breath has nowhere to escape but upward around cheaper to buy either the double rubber band the nose, causing the worker’s safety glasses to dust masks or half masks with prefilters in bulk fog up. Another issue with the paper mask is a than it is to buy one at a time. There are safety worker can go through five paper masks in 1 day supply houses around the country that have because of moist breath, sweat, or other types of good deals on safety items in bulk. It adds up mists in the air. Now multiply that by 5 days— at the end of the year when you start buying you now bought at least one box per worker for one at a time at a local lumber yard on an as- the week. If the conditions are right, you may be needed basis. able to get by with one mask per day, but that’s Think smart, be smart, and wear your PPE cor- highly unlikely in most nozzling conditions. rectly. It’s the later years in life that you begin to Back when I was promoted to superintendent, have health issues which could have been avoided. one of my many tasks was controlling personal protection equipment (PPE) safety costs. I looked at every item closely; some were obvious, which were corrected right away. The main issue Ray Schallom III is an under- was the costs of dust masks versus the cost of a ground shotcrete application fitted half mask respirator per worker. For me it specialist and President of RCS was easy; I had dealt with the paper mask issues Consulting & Construction Co. as a worker and realized it was cost-effective to Inc. He has 40 years of exper- properly fit each worker with a half-mask respi- ience as a Project Manager, rator. These half-mask respirators can be cleaned Owner, and Superintendent. and disinfected on a regular basis. The only Schallom works with State DOT steady cost would be the cartridges and prefilters departments with their shotcrete specifications or just the N-95 prefilters. There are several and trains engineering company’s inspectors in brands and models—some of which require the field of shotcrete. He is a Past President of cartridges where you can place an N-95 prefilter ASA, Past Chair of the ASA Education Committee, over top of the cartridges, then snap on a and is a member of the ASA Publications, Under- retaining cap to secure each prefilter. This pro- ground, Marketing, Sustainability, and Pool & tects the cartridge from clogging up, and for the Recreational Shotcrete Committees. Schallom is most part all you do is replace the prefilter. I use also a member of ACI Committees 506, Shot- an MSA Comfo Classic half mask, which comes creting, and C660, Shotcrete Nozzleman Certifica- with the cartridge receptacles. I am able to place tion, and ACI Subcommittees 506-A, Evaluation; two N-95 prefilters in each receptacle and snap 506-B, Fiber-Reinforced; 506-C, Guide; 506-E, on the retainer caps to keep the prefilter pads in Specifications; 506-F, Underground; and 506-G, place, which is shown in the mask in Fig. 3. (This Qualification for Projects. Schallom is a retired particular mask is 6 years old!) Everyone has ACI Certified Nozzleman in the wet- and dry-mix their preference on half masks. The projects I processes for vertical and overhead applications have been on the past 20-plus years only required with over 40 years of shotcrete nozzling experi- me to use the prefilters for dust protection. My ence in wet- and dry-mix handheld and robotic last CAT scan of my lungs showed up clear. In applications. He is an ASA-approved Shotcrete my last breathing exam, I was able to exceed the Educator and an ACI-approved Shotcrete Exam- passing limits set on the machine—the techni- iner for wet and dry applications. Schallom is also cian had to reset the machine higher each time a member of ASTM Committee C09, Concrete and to check my maximum lung capacity. I am happy Concrete Aggregates, and ASTM Subcommittee to say that wearing the approved OSHA and C09.46, Shotcrete. Shotcrete • Winter 2015 75


2015WinterShotcreteEMag
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