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MEMORAND June 24, 1991 RECEIVE ® JUN 2 7 1991 ENVIRONMENTAL HEALTH TO: Files PERMIT/SERVICES FROM: James Escobar, Deputy Public Works Director/O&M SUBJECT: HAZARDOUS MATERIAL SPILL: O BLOCK WEST TAYLOR STREET Charles Hunt, REHS, San Joaquin County Public Health Services, contacted me today to advise of a spill of approximately 30 gallons of Calcium Hydroxide. Roger Raymond, Manager of California Welding Supply Company, 817 S. Center Street, reported the spill on Monday, June 17, 1991. During an annual cleanup process, a sump pump on California Welding Supply Company's facility overflowed and approximately 30 gallons of Calcium Hydroxide flowed onto Taylor Street, south side, an estimated 75 feet east of Commerce Street. Taylor Street is the Santa Fe Railroad track area. Mr. Hunt had assumed Santa Fe owned the street area and contacted them as property owner. After he was advised the City owned the street, he notified us as the affected property owner. Calcium Hydroxide is a caustic material with a pH value potential of greater than 12.5. At this level the material is considered hazardous to humans and the environment. Mr. Hunt called to arrange a meeting at the site at 11:30 a.m. In attendance were Mr. Hunt, Mr. Raymond, Dave Miller, Santa Fe Railroad, and me. Mr. Hunt tested the pH level of at least four samples. Two on California Welding Supply Company's property and two on Taylor Street. Tested levels today were between 8 and 11.5. This falls below the hazardous threshold and takes it out of the jurisdiction of Public Health Services. Mr. Hunt request-A Mr. Raymond to remove some additional material from Taylor Street and try to achieve a maximum pH reading of 10. Mr. Raymond agreed and I concurred with Mr. Hunt's suggested maximum limit. JAMES ESCOBAR DEPUTY PUBLIC WORKS DIRECTOR/O&M JE:kh cc: Charles Hunt, RENS, Public Health Services Roger Raymond, California Welding Supply Company Dave Miller, Santa Fe Railroad