Del. Dorothy S. McDiarmid (D-Vienna), chairman of Virginia's House Appropriations Committee, has offered 16 budget amendments totaling more than $38 million for George Mason University.

The amendments would finance increased staff, library acquisition and automation, a new program for community college teaching faculty, creation of a public policy center, planning money to study higher education needs in Prince William County, expansion of a variety of programs and a number of construction projects.

The amendments were among 592 proposals by House members, adding up to $691 million, for additions to Gov. Gerald L. Baliles' $22.5 billion fiscal 1988-90 biennial budget.

The governor left about $7 million in the budget in unallocated funds, and for anything more than that amount the General Assembly would have to move money around in the budget or discover other revenue sources.

Appropriations Committee members also proposed a $35 million addition to Baliles' $65 million budget increase for mental health, mental retardation and substance abuse programs in communities; $5.6 million for new construction at Northern Virginia Community College's Woodbridge campus; $1.5 million for a day treatment program and special behavior unit at the Northern Virginia Training Center for the mentally retarded, and $12 million for a slight loosening of Medicaid eligibility requirements under a bill already approved by another House committee.