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u Union ,Ice Company - Union Street, Stockton Phase II Site Assessment - Report of Findings ,g Page 2 10 feet north of the excavation site and completed_as a monitoring well ata depth of 75 r feint. The-groundwater:level-was found to be at�approximatel.y 62 feet in the well. 3.0 DISCUSSION OF PHASE II ASSESSMENT + . 3.1. Subsurface Geology The sediments encountered in the drilling at the Union Ice, Union Street facility, consist primarily of gray to brown clay, which is locally silty or l slightly sandy, and is. probably fluviatile in origin. However, WOV-1 encountered a blue sandy clay unit at 55 feet, which may be marine in origin. 14tVi%1_also.penetrated a_four-.,foot (4') thick layer of,inedium°grained-micaceous-- ,F-jand-az a,depth'of 36_:feet. _ — --. ---- ---- 3.2 Distribution of Contamination I� 3.2.1 Tank #4 Area ElVQC1 boring B-1 encountered soil_contaminated.with:diesel-and uil�'grease at a depth of 10 feet below the surface and diesel. contamination to _ es - twenty feel, near the-bottom of the old stoiage tank (now removed) .(see . F` Figure 3, Appendix A. and Appendix B). The analysis also .show ,low " �16vcl§ f Toluene in the soilsamples from.25 an_dt35-foot depths_ Soil samples from the 10, 25, and 35 foot depths were analyzed for halogenated hydrocarbons by EPA method 8010 and returned "none detected" for all compounds (Appendix B). These samples were also analyzed for 17 metals by various analytical methods and amounts found were all below the STLC limits for the respective elements. E� 3.2.2 Tank #3 Area Monitoring well MW-1 encountered low levels of Toluene contamination from-a-depth of'35 feet down.to,the last,sample collected.at 55.feet (see Figure 4; Appendix A and Appendix D). The water sample collected from-the_well during"the—March 13, '1992; sampling event-showcd-`hone -- etected" for BTX&E and"gas. T �i � :i