Chatsworth-based health care company North American Scientific Inc. announced Wednesday that it has received notice from the Nasdaq Stock Market Inc. granting North its request to continue to be listed on the stock exchange. The listing is contingent upon North American’s filing of Form 10-Q for the quarter ending July 31 showing that its shareholders’ equity is more than $10 million. North American must also contends its 10-Q will meet the requirements based on the closing of a $24 million private placement of its common stock.