Chemical Substance Pollution Prevention

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Basic Stance

The UACJ Group believes that, for both manufacturers and society, it would be ideal if products could be made without giving rise to any substances negatively impacting the environment, anywhere within the supply chain. Achieving that ideal, however, will not happen overnight; it is something that must be pursued on an ongoing basis and sets the direction for our constant efforts to prevent contamination by chemical substances.

Fiscal 2015 Results

For discharges of environmental pollutants accompanying its production activities, the UACJ Group has set and abides by environmental (air and water) pollutant discharge standards that are stricter than those of Japan’s Air Pollution Control Law, Water Pollution Control Law, local government ordinances, and conventions.

Regarding discharges into the air and water in fiscal 2015, a discharge of wastewater with a COD (chemical oxygen demand) exceeding our own standard and the legal standard occurred at the Shiga Works of Nalco Iwai Co., Ltd. (now UACJ Metal Components Corporation). Other than that incident, which was properly remedied, there were no other discharges into the air or water in excess of standards.

Pollutant Control at Individual UACJ Works (Fiscal 2015)

○: Measurements fall within standards

  Measurement Item Nagoya
Air NOx、SOx、soot and dust
Water  pH、BOD
n-H(mineral oil)、SS

Control of PRTR Substances

The UACJ Group, in accordance with the PRTR Law, identifies amounts of targeted substances handled, released, and transferred, and reports them as required. We also work to reduce these volumes.

In fiscal 2015, the production volume of products using targeted substances increased, compared to the prior fiscal year. Overall releases of targeted substances, therefore, increased by 3.4% year on year. Nevertheless, with efforts to reduce usage of targeted substances, releases actually declined on a per-unit-production basis.

* PRTR Law: Act on Confirmation, etc. of Release Amounts of Specific Chemical Substances in the Environment and Promotion of Improvements to the Management Thereof

Amounts of PRTR Substances Handled

(Contain manganese, chromium, nickel, and lead as alloy substances)

Graph of Amounts of PRTR Substances Handled

Amounts of PRTR Substances Released or Transferred


Graph of Amounts of PRTR Substances Released or Transferred

  • ※Measurement Scope: UACJ (Nagoya, Fukui, Fukaya, Nikko), UACJ Color Aluminum Corporation, UACJ Extrusion Nagoya Corporation (Nagoya, Anjo), UACJ Extrusion Oyama Corporation, UACJ Extrusion Gunma Corporation, UACJ Extrusion Shiga Corporation, UACJ Foil Corporation (Isezaki,Shiga,Nogi), UACJ Foundry & Forging Corporation, UACJ Copper Tube Corporation.
  • ※ Figures for fiscal 2013 are totals of the sums for the two UACJ predecessors for the first half (April 1 to September 30, 2013) and UACJ for the second half (October 1, 2013 to March 31, 2014).

Handling, Releases, and Transfers of PRTR Substances (Fiscal 2015)

No. Substance Amount Used (kg) Amount Released (kg) Amount Transferred (kg)
412 Manganese and its inorganic compounds 2,515,736 0 16,720
300 Toluene 638,801 164,454 59,511
80 Xylene 191,652 15,591 3,628
296 1,2,4-trimethyl benzene 189,487 71,146 29,545
87 Chromium and chromium(III) compounds 186,363 25 28,835
273 1-dodecanol 159,762 80,607 52,909
308 Nickel 82,700 0 0
53 Ethyl benzene 62,883 6,761 1,193
374 Hydrogen fluoride and its water-soluble salts 59,657 1,726 15,532
71 Ferric chlorides 55,625 0 0
297 1,3,5-trimethylbenzene 35,525 21,762 2,318
88 Hexavalent chromium and its compounds 27,848 0 0
438 Methylnaphthalene 9,953 50 0
302 Naphthalin 6,679 158 24
304 Lead 4,697 0 0
133 Ethylene glycol monoethyl ether acetate 3,977 59 8
407 Polyoxyethylene = alkylether 3,547 3,511 0
207 2,6-Di-tert-butyl-4-cresol 3,542 2,228 1,314
245 Thiourea 3,500 0 3,500
392 n‐hexane 3,174 498 602
57 Ethylene glycol monoethyl ether 1,814 106 27
134 Vinyl acetate 1,392 31 136
405 Boron and its compounds 1,192 573 590
321 Vanadium compounds 1,039 0 0
  Total 4,250,546 369,287 216,392
  • Measurement Scope: UACJ (Nagoya, Fukui, Fukaya, Nikko), UACJ Color Aluminum Corporation, UACJ Extrusion Nagoya Corporation (Nagoya, Anjo), UACJ Extrusion Oyama Corporation, UACJ Extrusion Gunma Corporation, UACJ Extrusion Shiga Corporation, UACJ Foil Corporation (Isezaki,Shiga,Nogi), UACJ Foundry & Forging Corporation, UACJ Copper Tube Corporation.

Reducing VOC Releases

Having targeted for reduction substances such as toluene, xylene, ethyl benzene, and 1,3,5-trimethylbenzene, the UACJ Group is moving forward with initiatives for cutting releases of these VOCs (Volatile Organic Compounds) into the air. As one example, the cleaning solution we use for the finishing of sheet products is being replaced with one that has very low levels of the VOCs targeted for reduction.

Prevention of Air Pollution

The UACJ Group is working to reduce its emissions of air pollutants by keeping plant facilities in top working condition and moving forward with conversion from heavy oil to LNG as a fuel. At present, our efforts are succeeding in keeping SOx and NOx emissions at low levels.

NOx Emissions

Graph of NOx Emissions

SOx Emissions

Graph of SOx Emissions

  • Measurement Scope: UACJ (Nagoya, Fukui, Fukaya, Nikko), UACJ Extrusion Oyama Corporation.
  • * Figures for fiscal 2013 are totals of the sums for the two UACJ predecessors for the first half (April 1 to September 30, 2013) and UACJ for the second half (October 1, 2013 to March 31, 2014).

Measures to Control Offensive Smells at the Nagoya Works

To control the offensive smells that arise from its hot-rolling process, the Nagoya Works upgraded equipment in its exhaust facilities in 2012 to improve odor control performance. Going forward, it will continue to take steps that are fully cognizant of the area environment to enable smooth production activities in coexistence with the local community.

Control of PCBs

The UACJ Group, in accordance with the Law Concerning Special Measures Against PCB (Polychlorinated biphenyl) Waste, accounts for PCB-containing equipment for each of its plants, submits reports to supervisory authorities, and properly stores and manages these items. We also conduct surveys of fluorescent lamp ballasts and other small electrical devices and electrical devices suspected of containing small amounts of PCBs, and properly manage those exceeding standards.

We are steadily and properly rendering PCB-containing equipment harmless by commissioning the Japan Environmental Safety Corporation to perform this work. And, based on the judgment that stable processing of small amounts of PCB-contaminated oil is also now possible following an increase in the number of certified processors, we also have this work performed by an outside service provider when necessary.

Addressing the Problem of Asbestos

The UACJ Group has carried out a study of its historical and current usage of asbestos in products, plant buildings, equipment and fixtures. At present, we are not using asbestos in products and have never sold products containing asbestos.

As for our plant buildings, to a very limited extent, we have used spray-on asbestos, which entails a high risk of dispersion into the air, and have been working to remove it since fiscal 2004. At the present time, we have identified spray-on asbestos at the Fukaya Works, UACJ Foil Corporation’s Nogi Plant, and at UACJ Copper Tube Corporation, and will proceed to systematically remove it.

Regarding equipment and fixtures, we have already completed the replacement of items for which there was a risk of asbestos dispersion. Equipment and fixtures with a small risk of asbestos dispersion are being replaced when regular inspections are due and on other occasions, as well.

Measures to Control Dioxins

For its aluminum melting furnaces that qualify as designated dioxin-emitting facilities under the Law concerning Special Measures against Dioxins, the UACJ Group has implemented management that lowers dioxin concentrations in exhaust gases to levels below the regulatory standard.

More specifically, we prevent the development of dioxins by strictly managing the volume of combustion air for the subject aluminum melting furnaces and closely controlling the materials put into them.

In addition, we annually measure levels of dioxins for subject aluminum melting furnaces, as required by law, and report results to the government. All of our measurements of dioxins for fiscal 2014 came in below regulatory standards for the 24 facilities covered by air pollution regulations and the 2 facilities covered by water pollution regulations.

Prevention of Water Pollution

With the partial revision of the Water Pollution Prevention Act, promulgated in June 2012, reporting of information on storage facilities, piping, etc. used for harmful substances and compliance with standards set for structures became mandatory.

At the UACJ Group, all necessary reports were prepared at individual business locations by the May 31, 2015 end of the deferment period.

Prevention of Soil and Groundwater Contamination

UACJ Extrusion Oyama Corporation and UACJ Color Aluminum Corporation, as responses to past incidents of soil and groundwater contamination, have implemented continuous purification of contaminated groundwater, and periodically take measurements of contaminants, to confirm effectiveness. At present, purification measures are working and steadily lowering contamination levels.

Measures to Deal with Soil and Groundwater Contamination

Business Location Period Contaminant Response
UACJ Extrusion Oyama Corporation Since fiscal 1999 Tetrachloroethylene Soil replacement, water extraction and purification
UACJ Color Aluminum Corporation Since fiscal 2004 hexavalent chromium, fluorine Soil replacement, water extraction and purification

For information on the management of chemical substances included in products, please refer to the section titled, “Environmental Consideration in Products.”

Environmental Consideration in Products