Brent Scowcroft, President Bush's national security adviser, has removed himself from decisions affecting 70 companies, including a major defense contractor, because of stock he owns worth at least $1 million and up to $3.3 million.

But at the same time, Scowcroft has notified the White House legal counsel's office that he will seek waivers allowing him to take part in government dealings with some of the companies on the list in which his interest is insubstantial.The Ethics in Government Act of 1978 requires senior government officials to reveal their assets, liabilities and sources of income. It does not require them to list exact amounts but rather to report values within a range of money, such as $15,000 to $50,000 and $100,000 to $250,000.

Scowcroft's form revealed that the retired Air Force general was unable to specify for whom he provided services as a hired consultant for Kissinger Associates.

In a letter about his financial reporting form, Scowcroft told White House counsel C. Boyden Gray that former Secretary of State Henry A. Kissinger, who heads Kissinger Associates, "denied my request for a list of the clients for whom I worked." Scowcroft reported receiving $293,300 for his services to Kissinger.

Scowcroft said that "under my contractual relationship with Kissinger Associates, I worked for the company, not directly for its clients."

Scowcroft has at least temporarily removed himself from decisions involving dozens of companies, including Lockheed Corp., a major defense contractor, along with IBM, the RAND Corp., and Aerospace Corp.

Scowcroft received over $16,000 in consulting fees from Lockheed, for example. And he got $50,000 to perform as a consultant to the National Council for Peace and Security.

The disclosure form showed Scowcroft has extensive bank and stock holdings. Because officials are required under the law only to list the valuations of assets in monetary ranges, the form indicated that Scowcroft's holdings in 1988 were worth between $1,079,000 and $3,265,000.

Scowcroft reported liabilities ranging from $200,002 to $500,000.

Because a part of his income came from interest and dividends, which also needed to be listed only in value ranges, Scowcroft's report showed he earned between $527,894 and $649,994.

The disclosure form also showed that Scowcroft, formerly national security adviser to President Gerald R. Ford and later a member of the presidential commission that investigated the Iran-Contra affair, earned $53,751 in speaking honoraria.

Scowcroft, whose national security post pays about $89,000 a year, also received $49,452 last year for his membership on various corporate boards.