SENATE Meets at 10 a.m. Committees:

Commerce, Science and Transportation -- 9:30 a.m. Open. Business meeting to consider pending business. 253 Russell Office Building.

Environment and Public Works -- 9 a.m. Open. Environmental protection subc. On legislation to amend the Clean Air Act. 406 Dirksen Office Building.

Foreign Relations -- 10 a.m. Open. Legislation relating to U.S. involvement in the Persian Gulf. 419 DOB.

Foreign Relations -- 3 p.m. Closed. Western Hemisphere and Peace Corps subc. On Costa Rican peace initiative. S-116 Capitol.

Governmental Affairs -- 9:30 a.m. Open. Nucl. Prot. and Safety Act. 342 DOB.

Indian Affairs -- 2 p.m. Open. Mark up pending legislation. 485 ROB.

Judiciary -- 10 a.m. Open. Constitution subc. Handgun legislation. 226 DOB.

Democratic Policy -- Noon. Closed. Luncheon meeting. S-211 Cap.

Republican Policy -- 12:30 p.m. Closed. Luncheon meeting. President Reagan will attend. S-207 Cap. HOUSE Meets at noon. Committees:

Agriculture -- 10 a.m. Open. Dept. oper., res. and foreign agri. subc. Hearing to review the role of local govts. in the regulation of pesticides. 1300 Longworth House Office Building.

Education and Labor -- 9 a.m. Open. Health and safety subc. Oversight hrng. on the Mine Safety and Health Act. 2257 Rayburn House Office Building.

Energy and Commerce -- 9:30 a.m. Open. Transport., tourism and hazard mat'ls. subc. Hrng. to investigate the falsification of drug testing results at DOT and to review DOT's drug and alcohol testing program for railroad employes. 2322 RHOB.

Energy and Commerce -- 10 a.m. Open. Full comte. Mark up Medicare Catastrophic Protection Act 87 and NPR Elk Hills propane/butane sales. 2123 RHOB.

Foreign Affairs -- 10 a.m. Closed. Full comte. Hrng. on the military situation in the Persian Gulf. Defense Secretary Caspar Weinberger. 2172 RHOB.

Foreign Affairs -- 1 p.m. Open. Intl. econ. pol. and trade subc. Joint meeting with Africa subc. Oversight hrng. on the implementation of the comprehensive anti-apartheid law of 1986 and an assessment of recent South Africa political and economic develop. 2172 RHOB.

Government Operations -- 9:30 a.m. Open. Intergov'l. rel. and human res. subc. Business meeting to consider draft report. Conference room adjacent to 2154 RHOB.

Government Operations -- 10 a.m. Open. Full comte. Business meeting to consider draft investigative reports. 2154 RHOB.

House Administration -- 10 a.m. Open. Elections subc. Hrng. on campaign finance reform. 1302 LHOB.

Interior and Insular Affairs -- 10 a.m. Open. Natl. parks and pub. land subc. Mark-up to amend boundaries of Stones River Nat. Battlefield, Tenn. 2359B RHOB.

Judiciary -- 9 a.m. Open. Immig., refugees and intl. law subc. Mark-up to provide GAO invest. and report on conditions of displaced Salvadorans and Nicaraguans and naturalization amends. of 1987. B-352 RHOB.

Judiciary -- 2:30 p.m. Open. Criminal justice subc. Oversight hrng. on sentencing guidelines. 2237 RHOB.

Rules -- 10:30 a.m. Open. Full comte. Hrng. on Dept. of Justice auth. act for FY88, Coast Guard auth. 87 and building and construction industry labor law amends. 87. H-313 Capitol.

Small Business -- 9:30 a.m. Open. Full comte. Hrng. on health insurance coverage for small business. 2359A RHOB.

Ways and Means -- 1 p.m. Open. Health subc. Mark up legis. providing for coverage of outpatient prescription drugs under Medicare. 1129 LHOB.