Arlington School Superintendent Charles E. Nunley presented the county Board of Education last night with four proposed budgets for fiscal 1983, all of which call for a 5 percent salary increase for the school system's 1,600 employes.

Nunley said he supports a budget of $49 million in local funds, a 9.6 percent increase in what Arlington is spending in the fiscal year ending June 30 and a 7.9 percent overall increase when projected federal and state funds of $13.7 million are included.

Depending on which plan the county adopts, Arlington's share of the next school budget would be between $47 million to $50 million, for a total school budget of $60.7 million to $63.7 million. This year's school budget is $58.1 million.

Facing a projected deficit of almost $5 million next fiscal year, the Arlington County Board, which funds more than 75 percent of the school budget and will determine its final amount, advised the school board last fall not to request more than $47.5 million in local revenues, a 5 percent increase over the county's $44.7 million contribution this fiscal year.

Nunley rejected that directive, saying a $47 million budget would be a "meat-ax approach" with a "very negative effect on the instructional program." It would require the elimination of 72 jobs, including 17 nonclassroom teaching positions and a reduction of $744,656 in mostly noninstructional programs, he said. Nunley said it would cost $48.4 million to run the schools at this year's level.

A $49 million budget would restore all but 21 positions. Those lost would be mostly aides and and secretaries and most would be lost through attrition, Nunley said. That budget would also permit additional funds for textbooks, library books, $294,000 in capital improvements and additional aides and teachers for pupils who do not speak English.

If school employes are given the same 5 percent salary increase county employes are scheduled to get, that alone will cost $2.4 million, Nunley said. Teachers had sought a 12 percent pay raise.

"I hope the county board members will recognize some of the factors we have to deal with and that we tried to follow the guidelines in those areas where we could," Nunley said.

The school system is expecting almost a 50 percent cut from about $900,000 to $470,000 in federal impact aid used to help defray the costs of Fort Myer children in county schools.