More than 3,500 workers laid off from Bethlehem Steel's Sparrows Point plant have been certified to recieve cash, retraining and job-search benefits under a Department of Labor trade adjustment assistance program.

Rep. Clarence Long (D-Md.), who made the announcement last week, said the program was intended to help workers who have lost their jobs due to competition from foreign imports. A Bethlehem Steel spokesman said 4,700 workers are currently on indefinite layoff from the steel plant.

Long said laid-off workers could recieve weekly cash benefits up to $153 for a total of 52 weeks, reduced by the amount of unemployment benefits already collected. Workers in approved retraining programs would be eligible for an additional 26 weeks of cash benefits.

The Maryland state health department has cited Glidden Pigments-SCM Corp. for allegedly polluting the air near its Hawkins Point plant in northern Anne Arundel County with sulfuric acid mist and particulates.

The citations allege that state health inspectors found twice as much sulfuric acid mist in the air near the plant as air quality standards permit, and three times as much the permitted level of microscopic particulate pollution.

State officials said they believe the pollution is related to chemical pollution in a lagoon, for which they cited Glidden last February. Health inspectors cited the plant again last August during a routine inspection. At the state's request, the U.S. Environmental Protection Agency began testing the lagoon last month.

The Glidden plant processes ore to make white paint pigments and deposits its wastes in the lagoon.

SCM Corp. vice president and general counsel Samuel Friedman said the company will contest the latest charges, as it did the earlier ones.

The National Labor Relations Board has ordered the Gloria Manufacturing Corp. of Newport News to make restitution to the International Ladies Garment Workers Union for overdue payments.

The NLRB also ordered Gloria Manufacturing and its trustee in bankruptcy to stop encouraging its employes to resign from the union.

Pak-Mor Manufacturing Co., a garbage truck manufacturer in Duffield, Va., has laid off almost two-thirds of its work force to cut costs.

Pak-Mor had employed 90 people before the layoff. Fifty-three workers were cut from the payroll.

Plant manager Richard Thompson said the "unavoidable" layoffs were "basically due to a slack economy."

The Maryland Industrial Development Financing Authority closed 11 loans in December to firms in six Maryland counties and Baltimore City. The loans, totaling more than $14.5 million, are expected to generate 439 new jobs. The loans included:

* $1.1 million to EVAPCO Inc., to establish a plant in Taneytown. The firm, which also operates a plant in Baltimore City, manufactures water-cooling equipment for commercial air conditioning and industrial processing uses. The Taneytown facility is expected to generate 73 new jobs.

* $600,000 to Whitmore Printing and Stationary Inc. of Annapolis to consolidate its commercial printing operations into a new 12,500-square-foot building in the Annapolis Business Center. Whitmore's expansion is expected to create 15 new jobs.

* $600,000 to Environmental Air Control in Hagerstown to expand its manufacturing and office space. Approximately 70 new jobs are expected to be created.

In Washington County, Md., two industrial revenue bonds totaling $3.4 million have been approved to assist two county companies expand operations.

* A regional wholesale grocer, Creasey Co., received a $2.4 million industrial revenue bond to construct a new 126,000-square-foot warehouse, distribution and office complex at the Interstate Industrial Park near Hagerstown. Forty new positions are expected to be added in the next five years.

* The Preston Trucking Co., also located in the Interstate Industrial Park, received a $1 million revenue bond for construction of a 28-door terminal. The company, which started with four employes in 1976, now has 27.

Holiday Inns Inc. has begun construction of its first all-suite hotel here, located at 8517 Leesburg Pike near Tysons Corner.

The triangular-shaped hotel will have 235 suites, an indoor pool, a restaurant and glass elevators overlooking an eight-story skylit, landscaped atrium.

The hotel, which has not yet been named, is one of the chain's first entries into the all-suite hotel market. A second local suite hotel is planned for Crystal City.

The $8 million project is being built by Donohoe Construction Co. Completion is scheduled for early 1984.

Peoples Drug Stores Inc. has filed with the Securities and Exchange Commission a registration statement covering the proposed offering of $30 million in convertible subordinated debentures due 2008.

The company intends to use the proceeds from the sale of the debentures to retire its variable rate long-term bank debt and for working capital purchases.

Planning Research Corp. of McLean has received an $8.1 million contract from the Air Force Rome Air Development Center to continue performing scientific and technological systems work related to electronic warfare.

The work will be done for the Air Force foreign technology division at Wright-Patterson Air Force Base in Dayton, Ohio.

PRC has also received a nine-month extension on its contract to perform work for the Defense Department's Joint Interoperability of Tactical Command and Control Systems (JINTACCS) project. The extension is valued at about $2 million.

Dividends: Potomac Electric and Power Co. declared a quarterly dividend of 44 1/2 cents per share, payable March 31 to stockholders of record Feb. 25. . . . United Services Life Insurance Co. declared a stock dividend of 10 percent, payable Feb. 25 to stockholders of record Jan. 28. A quarterly cash dividend of 25 cents per share, with the same payment and record dates, was also declared on the total number of shares outstanding after payment of the stock dividend. . . . Federal National Mortgage Association declared a quarterly dividend of 4 cents per share, payable Feb. 25 to stockholders of record Feb. 1. . . . AVEMCO Corp. declared a quarterly dividend of 14 1/2 cents per share, payable April 26 to stockholders of record March 1.

More than 236,000 cars were imported at the port of Baltimore in 1982, down less than 1 percent from 1981, according to figures released by the Maryland Port Administration.

Rep. Kenneth Robinson (R-Va.) has introduced legislation to block California winemakers from using the name "Shenandoah Valley," which is also used by Virginia winemakers.

The Department of Treasury's Bureau of Alcohol, Tobacco and Firearms ruled in December that wineries in Amador and El Dorado counties in California's Shenandoah Valley could use the label if it included the name California. The rule goes into effect Jan. 27, but Robinson's staff said the congressman will continue to push the bill after that time.

Avon Fashions Inc., a division of Avon Products Inc., has announced a $1 million, 80,000-square-foot expansion of its existing space at Norfolk's Copeland Industrial Park. The firm plans to employ up to 400 additional workers there over the next few years.