Document rez471pd5MZamL8O5yN5Gbj7G

INDUSTRIAL HYGIENE REPORT SUMMARY The annual noise survey was conducted. The compressor building is the main high noise level at 9M - 97 dB(A). The labs fume hood was surveyed and found to be acceptable. It should be rechecked after it is moved into the new lab. A product injection pump'was surveyed for build-up of radioac tive deposits on the impellar and inside surface of the pump case but none was found. Personnel monitoring for benzene exposure will be conducted later in the year. DISTRIBUTION LOUISIANA J. R. Boudreaux, 8301 M. F. Currier, 2303 G. W. Daigre, 3502 J. 0. Devillier, 8301 A. J. Dugas, Grand Bayou L. P. Dugas - Grand Bayou W. J. Neely, 2306* J. W. Wheeler, 8302 File (2) MIDLAND L. W. Rampy, 1803 * G. S. Dickson, 322 M. G. Swank, 1803 OTHER *F. D. Axe, Pitts. *F. H. Braunlich, Tulsa *R. L. Daniel, Freeport *S. A. Goode - OCX) *R. J. McCormick - Strongsv *R. D. Olsen, Sarnia DO 017031 CONFIDENT! At -2- INTRODUCTION On January 21, 1981, some industrial hygiene surveying was conducted at the Grand Bayou Promix Plant as part of their annual monitoring program. Included was an area noise survey, a hood survey and a survey of a product pump for internal build-up of radioactive deposits. DISCUSSION OF RESULTS Noise Survey An area noise survey was conducted at the Grand Bayou Plant using a hand held B and K Type 2219 sound level meter. The results are shown in Figure 1. The area of most concern is the compressor building which had sound levels of 91* - 97 dB. The area between the heaters had the highest noise level in the plant. Anyone entering this area for more than a few minutes should wear hearing protection, although it appears unlikely that anyone would spend any time there. The new Federal Noise Standard which is scheduled to go into effect soon will probably require that hearing protection be worn in all areas that are 90 dB and above. Hood Survey The laboratory fame hood at the Grand Bayou Plant was eva luated for air flow at the hood face using a Hastings Air Flow Meter. The hood was determined to be a Class B fume hood according to the air velocity requirements listed below: Class A (high toxicity use) Carcinogenic, toxic, highly flammable 125 - 150 ft/min average hood face velocity. 100 ft/min minimum reading Class B (normal lab use) Toxic or flammable 100 ft/min average face velocity 80 ft/min minimum reading Class C (low toxicity use) Non-toxic or non-hazardous compound 75 ft/min average face velocity 50 ft/min minimum reading Class D (Inadequate Does not meet minimum requirements The hood survey data appears in Figure 2. DO 01P032 CONFTDFNTTAt. -3- When the fume hood is moved into the new laboratory that is pre sently under construction, it should be rechecked to make sure the air flow is still adequate. Radiation Survey One of the product injection pumps that had been taken out of service for maintenance was surveyed for radiation. Radioactive decay products from the Radon 222 that occurs naturally in natural gas and natural gas products can build up on the inter nals of ethane and propane pumps. When this happens, it poses a potential hazard for someone performing maintenance on the pump. Such a build-up, when it occurs, is usually found on the impellar surface but can also form on the internal surface of the pump housing and inside the discharge pipe or elbows directly adja cent to the pump. The pump which was surveyed appeared to be very clean with no visible build-up of scale inside it. No radiation of any type (Beta or Gamma) was detected on any part of the pump. Instruments used were a Texas Nuclear Cutie Pie Model 2592 (Beta and Gamma) with a detection limit of 0.5 mR/hr and a Victoreen Model 491 (Gamma) with a detection limit of 0.005 mR/hr. No measurements were made of Alpha radiation. PLANS Monitoring for personnel exposures to benzene will be conducted later in the year. BL:sb 4/13/81 DO 010033 CONFIDENT I Al ;I FIGURE 1 1981 NOISE SURVEY GRAND BAYOU PR0MIX PLANT SOUND LEVEL INDICATED IN DB(A) 1-21-81 W.E.L. 81 ooooo BcP glP 84 on ground m EP PUMPS . cm CD 95 at 3 feet CD when operating cm CUD CO: (CO. CTO o o 69 inside analyzer building compressor bui1ding cooling tower ' B&K type 2219 sound level meter A weighted scale, slow response calibrated at 94 dB, 1000 Hz with BK type 4230 sound level calibrator o 84 O o on 017034 CONFIDENTIAL Fv*^r& a. HOOD SURVEY DATA FILE NUMBER------------------- BUILDING NUMBER 6ate TYPE OF HOOD mHOOD LOCATION, DESIGNATK "Woa'mjt ? 'INTERNAL baffle EXTERNAL BAFFLE? t-2hP La/} UslU L 0 OtJ CHEMICALS HANDLED IN THIS HOOD besie^/i vtes No OTHER HOODS CONNECTED TO THE xHAL>if Stit^M *r No SOURCES OF AIR DISTURBANCE ExTt InaL TO YhiL STATIC PRESSURE / /* 'Cvonf 'f l\ oe A -- Uc.ry pVu/ior REMARKS r C'fVec.Y" rtfeJi** t-td IN, WATER RECOMMENDED MEAN FACE VELOCITY FOR THIS HOOD/ 3 O F. P. M., DOOR OPEN/ ?IN. recommended exhaust rate for this hoop H f. F. M. ' HOOD CONDITIONS DURING THE SURVEY ACTUAL FACE VELOCITIES HOOD FACE AREA DURING SURVEY EXHAUST RATE DURING SURVEY MAXIMUM OPENING: HEIGHT /7 MAXIMUM / F.P.M. MINIMUM f6Q F.PJA ___ 72*W FT. IN., WIDTH S-Y3 opjl */0 IN. MAXIMUS HOOD FACE AREA*/ MEAN //S' F.PJA- VARIANCE (,*) SQ. FT. INSTRUMENT used for air velocitt measurements FORM C'USO PRINTED IN U.S.A, R-1M4 SERIAL. NUMBER 30$- SURVEYOR M_ A DO 012035 OONFIDENTTAt