1 Settelable solids by Imhoff cone test. Efficiency based on suspended solids is somewhat lower, but little data available. Relatively little data available. Net flow to sludge filter-does not include sludge recycled to feed well of clarifier. As delivered to sludge filter, including dilution water added to suction line to facilitate pumping. TABLE C.-Primary sludge filter-Typical operating data Little data available, not a routine test. 41st stage vacuum is the so-called cake form zone, and the 2d stage is cake drying zone. 1 With all production units of mill in operation. With holding basin agitator shut off, basin functioning as preclarifier. With agitator on, settleable solids are in range 1.0 to 2.5 ml./1. Range for 95 percent of all data. pH of final effluent has never been below 6.5 nor above 8.5. Based on BOD removed. 1 Adjusted to average sludge recycle rate of 3.300 gpm. 2 At pH 4.5. Primary constituent assumed to be CaCO3. 3 Ash, adjusted for CO2 loss from acid solubles, minus gross acid solubles. Estimated from microscopic examination of stained sample (difficult). Incompletely stabilized zoogloeal mass, probably contains stored food. Fresh sludge from secondary clarifier, 1 hour settling with gentle sitrring, susp. solids 1.2-1.6 percent. 7 Fresh sludge from secondary clarifier, filtered with Whatman No. 40 paper. Based on gross spray field area of 20 acres, including overspray and surface runoff coverage. ARMCO STEEL CORP., Middletown, Ohio, April 28, 1966. Hon. EDMUND S. MUSKIE, Chairman, Air and Water Pollution Subcommittee, House Public Works Committee, House of Representatives, House Office Building, Washington, D.C. DEAR SENATOR MUSKIE: In connection with the testimony on air and water pollution abatement given by Mr. Fred Tucker on behalf of National Steel Corporation and other steel companies, including Armco Steel Corporation, in addition to endorsing Mr. Tucker's testimony as our own, we are submitting for the record a specific report setting forth the expenditures made by Armco Steel Corporation for the purpose of air and water pollution abatement facilities during the past fifteen years, and a specific listing of the expenditures we propose to make at each of our major operations during the next five years. With respect to expenditures made since 1950, it should be noted that the total of nearly seventeen million dollars expended for nonproductive facilities also includes an annual expenditure of over one and a half million dollars merely for the operation of these facilities. The expenditure that Armco would be required to make in the next five years to meet present standards would require an additional expenditure of sixty-five million dollars and an additional annual operation cost of six million dollars. The details of such expenditures are listed for each of our major operations. Since all of these expenditures both for facilities and for their operation would be made solely for the purpose of meeting a social need of cleaner air and water. it is hoped that your Subcommittee's concern for the achievement of these so cially desirable objectives will be reflected in earnest recommendations to the appropriate Committees of Congress to provide tax incentive for private industry to encourage such essential and very substantial installation and operating costs. Since your Subcommittee has provided for substantial federal grants to state and community air and water pollution abatement organizations, there seems to be full justification for providing adequate tax incentives for private industry. Very truly yours, C. WILLIAM VERITY, President. AIR AND WATER POLLUTION ABATEMENT ARMCO Armco Steel Corporation February 1966 WHAT IS ARMCO ? • Sixth Largest Steel Producer in U.S.A. Steel Plants Located in: • Total Employees 36,000 • Headquarters Offices - Middletown, Ohio The pollution of air and water in the United States has resulted from the combined abuses by the general public, municipalities, industries, and other public and private institutions over the past century when the foundation was being laid for our modern industrial economy. To reverse this trend will require both time and the cooperative planned efforts of all segments of our society. The investment of millions of shareholder dollars in non-productive facilties must be made in accordance with a carefully planned schedule, over a period of years, so the financial condition of our company will not be impaired. The hasty diversion of capital to non-productive uses could adversely affect our entire American economy. We believe that both legimitate environmental needs and economic feasibility must be taken into account when pollution abatement standards are set. Those who study the massive problem of pollution in the United States realize that pollution abatement facilities are costly and generally non-productive. AS A CORPORATE CITIZEN, WE RECOGNIZE OUR RESPONSIBILITY TO COOPERATE FULLY WITH |