The ISO Unit is behind you.  You are looking south at the Sandblasting and Paint Shed for Cargo Tanks.

After the RMS AGGREGATE has blasted the chemical coating off of the cargo tank, it becomes a substance that is a combination of RMS AGGREGATE and CHEMICAL COATINGS. For the purpose of this presentation, until I hear a better term, I am calling this substance BLASTING DUST. For us to understand what this BLASTING DUST is we need to look at the Material Safety Data Sheet for RMS AGGREGATE and some toxicological studies of COAL SLAG.

MATERIAL SAFETY DATA SHEET
(Complies with 29 CFR 1910.1200)

SECTION I - GENERAL
Reed Minerals, Harsco Corporation
P.O. Box 0515
Camp Hill, PA 17001-0515

Product Name: RMS
CAS Number: 14464-46-1 (Cristobalite)
14808-60-7 (Quartz)
Particles not otherwise regulated.
Common Name: Slag, Coal
Date: February, 1998

The picture above was taken while standing inside the shed used for sandblasting and painting (coating) cargo tanks.

The picture above was taken while standing on the northwest corner of the Blasting and Painting Shed looking to the southeast.

OSHA *PEL

15

10

5

3

Quartz:

(30 mg/m³ /% 
SiO₂+2)

N/A

(10 mg/m³ /% 
SiO₂+2)

0.10

N/A

0.05

Sand blasting and chemical coating area. The ground is coated with black sand (Coal Slag). It comes from sandblasting the paint (chemical coatings) off of the tanks.  It looks like they have washed it off the floor to this area.  This is the west side of the Sandblasting and Painting Shed for Cargo Tanks. The picture above was taken from the northwest corner. 

You are standing next to the west side of the Blasting and Painting Shed looking north, or back toward where you were standing while taking the last picture. The Blasting Dust here has a historical look to it; like it has been here a long time, and has seen many rainy days.

The picture above was taken from inside the Blasting and Paint Shed looking toward the north.  It appears as though they just leave the RMS on the floor, on the ground, and anywhere else it falls. How long has this been soaking into the ground?

This is blasting dust on the left side of the road in the picture above.  You are on the southwest corner of the Blasting shed looking north. The small shed in the picture is used for storing chemical coatings and solvents.

SECTION IV - FIRE AND EXPLOSION DATA
Product is non-flammable and non-explosive.
SECTION V - REACTIVITY DATA
Product is stable under normal conditions of use, storage, and transportation.

SECTION VI - HEALTH HAZARD DATA

RMS aggregate may contain up to 0.3% cristobalite; one of the three major forms of silicon dioxide (crystalline silica). Quartz may be present up to 0.2%, tridymite has not been detected. RMS aggregate, as shipped, do not pose a significant health hazard and should be treated as a nuisance dust. The only significant route of exposure which could pose some level of health hazard is inhalation of respirable particles which may occur during use. As shipped, there are essentially no respirable particles in RMS Aggregate. Contact with intact skin is not known to cause health effects. Eye contact may cause irritation but has no known toxic effects.

The International Agency for Research on Cancer (IARC) reviewed the evidence for the carcinogenicity of crystalline silicas in animals. One study utilized intrapleural injection of cristobalite with particles in the respirable range. Malignant lymphomas of the histiocytic type were observed in the treated rats.

Cristobalite and quartz are not identified as carcinogens by OSHA but are identified as probable carcinogens by the International Agency for Research on Cancer (IARC) and reasonably anticipated to be carcinogens by the United States Department of Health and Human Services’ National Toxicology Program (NTP).

Respirable quartz tested for carcinogenicity in rats by chronic inhalation and in rats by single or repeated intratracheal instillation, produced a significant increase in the incidences of adenocarcinomas and squamous cell carcinomas of the lung. Based on this study and on those on other forms of crystalline silica, IARC considered the evidence for the carcinogenicity of crystalline silica in experimental animals to be sufficient.

In humans, overexposure to respirable crystalline silica is known to cause silicosis. Silicosis is a chronic disease characterized by the formation of scattered, rounded or stellate silica-containing nodules of scar tissue in the lungs, ranging in size from microscopic to 1.0 cm or more. This can cause symptoms of coughing, dyspnea, wheezing and nonspecific respiratory ailments. Some epidemiology studies have shown a potential connection with lung cancer in those professions with high exposures to respirable silica. Many other studies have failed to find such a connection; however, tobacco smoking and high dust exposure exhibited a synergistic relationship. Pre-existing lung conditions may aggravate the results of exposure to silica dust.

- NOTE-
The opinions expressed herein are those of qualified experts within Harsco Corporation. Harsco believes that the information contained herein is current and accurate for the normal and intended use of this product as of the date of this Material Safety Data Sheet. Since the use of this information and of those opinions or the conditions of use of the product are not within the control of Harsco Corporation, it is the user’s obligation to determine and observe the conditions of safe use and disposal of the product by their operations.

(RM 6/98)

Reed Minerals, Harsco Corporation
P.O. Box 0515
Camp Hill, PA 17001-0515
Telephone (717) 763-4200

SOURCE:  http://www.reedmin.com/products/msds/msds_a03.html

This blasting dust on the ground in the above picture is from processes that occur in this area. This area is south of the Tailbrine Pond and northeast of the Blasting and Painting Shed for Cargo Tanks.

BLASTING DUST IN HAZARDOUS WASTE DUMPSTERS

I.   PRODUCTION IDENTIFICATION

Trade Name as Labeled:  Universal Abrasives  ( Coal Slag )