Document B5N99ovMzkjN97vL79nxQpwpo

April 14, 1977 Mr. Robert B. Schaffer, Director Effluent Guidelines Division (WH-552) U. S. Environmental Protection Agency Washington, D. C. 20460 Dear Mr. Schaffer: This is in'response to your letters to our refinery locations vhich requested that they complete the Petroleum Refinery Industry Survey. These letters were received by the refineries during the week of February 14, 1976. We have enclosed Portfolio B of the Survey for our Anacortes, Ciniza, Deer Park, Martinez, Norco, Odessa, Wilmington and Wood River Refineries. Portfolio A for the first six locations was submitted on March 18, 1977 and for the last two on March 25, 1977 under separate cover. In general, in completing Portfolio B, we did not list chemicals as purchased or manufactured if we felt that the likelihood of their presence in wastewaters, in any significant concentrations, was extremely remote and not verified by analysis. Nor did we list hydrocarbons if they are not purchased or manufactured in relatively pure form. Several examples of chemicals excluded based on the above criteria are listed below: 1. Likelihood of presence in significant quantities is extremely remote and not verified by analysis. a. Laboratory reagents because the quantities Involved are so small. b. Asbestos because present-day safety procedures require careful handling. c. Chemicals which may be present in additive packages for hydrocarbon products if they would be expected to remain preferentially in the hydrocarbon phase; one exception is lead which was included because of the quantities of lead additives handled. LAM 004354 DPMC-10429