Schnitzer Steel Industries Inc., Portland, Ore., added the Vanguard 500 index fund to its $45 million 401(k) plan, said Edgar Shanks, vice president of taxation. The additional index fund increases the plan options to seven from six, Mr. Shanks said. Barclays Global Investors also provides an equity index fund for the plan. Mr. Shanks declined to discuss other funds in the program. Arnerich Massena assisted.