Ok, last try since I am out of time, this one might do the job … …
Look long enough and you will probably find better sources for this sort of information… … … …
… … Big quote from: tuberose.com/Chemicals_in_Food.html
Out of 3.5 million truck drivers, four from the Northwest broke a code of silence in the industry, and told members of a House Public Works and Transportation Subcommittee in July, 1989 that it is common practice to use the same refrigerated trailers to haul food and garbage. The truckers described how loads of food are taken from farm states to Eastern cities and then exchanged for loads of urban waste that are “back-hauled” to landfills in the South and Midwest. Then the process is repeated, with the trucks again hauling food eastward. “It actually pays more to haul garbage than food,” testified one trucker. For example, Indian River, a nationally recognized Florida tank company that regularly hauls liquid foods, with a fleet of more than 300 tank trucks, was regularly hauling a non-food-grade chemical for Nyacol Products, of Ashland, Mass. The substance is colloidal antimony, a pentoxide used as a flame proofing agent in textiles and plastics (shown to cause acute congestion of the heart, liver and kidneys, according to the American Conference of Governmental Industrial Hygienists). One of the tankers, owned by a nationally known carrier with a large fleet of tankers, had previously carried ethylene glycol (also known as antifreeze; it is in the family of solvents, and also is used as hydraulic fluid and as a chemical intermediate in the production of polyesters), then carried cooking oil. Another Midwest owned tanker previously had carried latex emulsion that had dried on the inside of the tanker a half-inch thick, and then carried apple juice. Robert DeLashmit heard truckers tell how they hauled engine oil, resin and formaldehyde in tankers that next carried refined cooking oils for his firm, Premier Edible Oils of which he is executive vice president. The truckers testified that Premium Transport supplied the Portland refinery with false information that they were hauling only juice. Yet, his company continues to use the company to haul refined kosher oils used by the baking, salad oil, margarine and the confectionery industries.
An official with a nationally known carrier that operates a fleet of more than 2,000 tankers, said the bottom line is cheap freight rates. He told a Yakima Valley, Washington, juice processor that tankers were hauling their juice South but backhauling asphalt emulsion North. “They just didn’t want to hear that,” he said. Don Roberts, a trucker from Kansas City, says he alternated food loads such as juice with chemicals more dangerous than those reported by the Northwest tank truck drivers. Roberts has hauled insecticides to the Yakima Valley, then loaded apple juice. He took a load of highly toxic phenolic resin to Oregon, after which he took on a load of kosher cooking oil. Other times, Roberts said, he dropped off a load of the wood preservative, Pentachlorophenol, containing the potent carcinogen dioxin, in North Dakota and then drove to Yakima to pick up apple juice. “Other tank companies were doing the same thing,” Roberts says. “We hauled anything that was liquid. It was legal. There was no reason not to.” The drivers who came forward to expose some of the hauling practices said they lied or falsified paperwork to hide the fact they had just hauled a chemical. Food companies, they said, never tried to verify the information. “If people are telling you this is not widespread, it’s a blatant, outright lie,” says a cleaning specialist at a large tank wash facility on the West Coast. This man cleans hundreds of tankers for carriers around the country, and he says many of them are hauling chemicals before going on to load a food-grade commodity.
Some of this has been against the law in the states (there is more US stuff on the net than Euro stuff) since 1990: wtvt.com/investreptr/oj.html … although the law relates to WASTE products and not industrial chemical products / oils…
… obviously some food producers will have their own rules so I am not suggesting that it happens with EVERY product.
G