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ENVIRONMENTAL HEALT DEPARTMENT SAN JOAQUIN COUNTY Unit Supervisors 2 2 Donna K. Heran, R.E.H.S. 304 East Weber Avenue,Third Floor Carl Borgman,R.E.H.S. �. fl' < Director Al Olsen, R.E.H.S. StOCkton,California 95202-2708 Mike Huggins, R.E.H.S., R.D.I. Douglas W. Wilson, R.E.H.S. • �., P• Program Manager Telephone: (209)468-3420 Margaret Lagorio,R.E.H.S. g4iFOR� Laurie A. Cotulla, R.E.H.S. Fax: (209) 464-0138 Robert McClellon, R.E.H.S. Program Manager Jeff Carruesco,R.E.H.S. Website:www.sjgov.org/ehd/ DAVID BUCCOLO SUPERINTENDENT JUL 2 8 2005 CENTRAL CALIFORNIA TRACTION COMPANY 2201 W WASHINGTON STREET #12 STOCKTON CA 95203-2942 RE: Central California Traction 1645 Cherokee Lane Stockton, CA On July 12, 2005, San Joaquin County Environmental Health Department (EHD) staff made an inspection at the above referenced facility after notification from David Solis with RAH Environmental, Inc., that during excavation of contaminated soil a cement sump with an abandoned drinking water well beneath it had been found. At the time of the inspection EHD staff observed the excavated area (the sump had been removed) and the well casing. A 100-foot measuring tape was placed down the well casing and the total depth of the well could not be determined, it was thought the well was over 100 foot deep. When the measuring tape was removed from the well, there was hydrocarbon odor. Initially, it was thought that the sump had contained some type of waste and that the well was used for the disposal of the waste. Since ground water is a source of drinking water, subsurface waste disposal is regulated under the United States Safe Drinking Water Act. EHD has implemented a Local Agency Groundwater Protection/Underground Injection Control (UIC) Program in accordance with guidelines prepared by the United States Environmental Protection Agency (USEPA). The primary focus of the program is to protect drinking water by identification and evaluation of subsurface disposal of waste fluids that may lead to the degradation of drinking water supplies. The above described well may be a shallow injection well so your facility has been listed as a possible UIC site. On July 13, 2005, EHD was informed that there was some information that indicated the cement sump may have been a cistern to provide water to the steam locomotives. Since excavation activities were continuing which could cause the well to collapse, EHD required the well be destroyed immediately. On July 15, 2005, Spectrum Exploration, a licensed well contractor company, destroyed the well under permit and inspection of EHD. The well was stated to be 80 to 90 foot deep on the EHD well destruction permit. A water sample was collected from the well prior to the destruction. The sample was analyzed for Volatile Organics using EPA Method 826013, Semi-Volatile Organics using EPA Method 8270, Metals using appropriate EPA methods and Total Petroleum Hydrocarbons (TPH) using EPA Method 8015M. The results of the water sample analysis showed 4460 ug/I of TPH as diesel, 13.7 ug/I of 1,1- Dichlorothene, and 13 ug/I of 1,1-Dichloroethane. The maximum contaminant level for public drinking water is 6 ug/I for 1,1-Dichlorothene and 5 ug/I for 1,1-Dichlorothane.