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M: HAZARDOUS WASTE MANAGEMENT BRANCH c' 1 ABANDONED SITE PROJECT SITE INFORMATION S-UMMARY x - - T S ASI JOAQUIN COUNTY Site Name: Brea Ag Services -- 1336 West Fremont Stockton, CA 95201 Site Location: Linden and Wall Roads Linden, CA 95236 Contact: Steven de Haas _ (209) 466-5911 - Staff-Responsible: A. Schmit, J. Henley History and Problem: This site is one of four, operated by Brea Ag Services, Inc. , in San Joaquin _ County. The property was originally owned by-Hughes Spray Chemical (a pesticide and fertilizer application firm) until Brea acquired it in 1981. -There -is an-unlined evaporation pond -on site located in the northwest portion of the ' - to ri- property. The pend was installed eight to ten years ago, although there is ffrom able documentation of this. Currently, the pond only receives rain water r the plant yard. However, there is no information regarding the use of the pond prior to Brea Ag's purchase of the property. 9-8-82) the pond was dry with slightly moist areas Upon inspection (see report dated in the lowest locations. Vegetation in the area appeared stressed (see photos in file) . Samples were obtained from five separate positions and analyzed for pesti- cide contamination (chlorinated pesticides and chldrinated hydrocarbons) and pH. Of the samples taken, two contained 4,4-DDT in total concentrations of 7.4 ppm and 1.2 ppm. A third sample contained both 4,4-DDT and 4,4-DDE with total concentrations of .6 ppm and .4 ppm respectively. pH ran from 2.39 to 5.92, at 50% dilution. Proposed Action: - The Abandoned Site Project is referring this site to HWMB enforcement for further action. We suggest a more thorough sampling of the ponds as samples obtained were "grab samples" only.- Contamination may be much deeper .in the soil and could possib- ly reach groundwater. Wells in the area should also be tested for contaminants. 4;