COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

ARIto of California The Resources Agency, emor and um � �__ To Mr, Charles T.__Carnahan, Executive Officer Date: September 26, 1969 Central Valley Regional Water Quality Control Board 2424 16th Street Sacramento, California 95819 Fpm Department of Fish and Game Regional Manager,, Region II Subject: Suggested Requirements Change for McCormick and Baxter Creosoting Company, Stockton, San Joaquin County On April 6, 1969 a fish kill occurred in Mormon Slough involving 1,000+ threadfin shad and about 250 each of catfish, striped bass, and perch. We sent you a copy of this report. At the time of the fish kill, a sump from McCormick and Baxter was over- flowing r- flo °ng and discharging wastes into Mormon Slough. Waste material from this sump normally discharges into the City of Stockton sewer line. Samples collected on Apria 6, 1969 at the time of the fish kill indicate that McCormick and Bauer were in violation of Item 5 of their discharge requirements which reads: "The waste discharge shall not cause concentrations of materials in the receiving waters which are deleterious to human, plant, animal or aquatic life." A bioassay toxicity test conducted on the discharge from McCormick and Baxter indicates this discharge was extremely toxic to fish with a 48 hour TLm of 0.032%. This means that one part sample water mixed with 3,125 parts dilution water will. kill 1/2 of the test fish in 48 hours. Pentachloro- phenol, eac ophenol, copper and zinc in the discharge exceeded levels known to be lethal to fish. In a toxicity test conducted on a water sample collected in Mormon Slough in the vic b ty of McCormick and Baxter discharge, all test fish were killed within 24 hours. Copper, and zinc were present in Mormon Slough in excess of levels found to be lethal to fish. I A t-ted 4. OCT w„ SAN JOAQUIN LOCAL EPULTH DISTRIGM