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„ <br />*CAM B R I A <br /> During November 2000, Cambna advanced four CPT borings to further assess the vertical and <br /> lateral extent of petroleum hydrocarbons beneath the site Soil from these borings contained <br /> TPHg at concentrations up to 3,150 ppm and benzene at concentrations up to 14 7 ppm <br /> Groundwater from these borings contained TPHg at concentrations up to 109,000 (parts per <br /> billion (ppb) and benzene at concentrations up to 31,300 ppb This investigation is documented <br /> in our December 20,2000 Site Investigation Report <br /> During November 2001, Cambria advanced three CPT borings to further assess the vertical and <br /> lateral extent of petroleum hydrocarbons beneath the site Soil from these borings contained <br /> TPHg at concentrations up to 12 ppm and benzene at concentrations up to 0 084 ppm <br /> Groundwater from these borings contained TPHg at concentrations up to 47,000 ppm and <br /> benzene at concentrations up to 19,000 parts per billion (ppb) Well MW-16 was also properly <br /> destroyed on November 15, 2001 This investigation is documented in our December 13,2001 <br /> Site Investigation Report <br /> During August 2002, Cambria installed six deep zone monitoring wells to further assess the <br /> vertical and lateral extent of petroleum hydrocarbons beneath the site No soil samples were <br /> collected from these bonngs This investigation is documented in our October 2,2002 Site <br /> Investigation Report/Groundwater Monitoring Report--Third Quarter 2002 <br /> During August and September 2004, Cambna advanced two CPT borings to further assess the <br /> vertical and lateral extent of petroleum hydrocarbons beneath the site Soil from these borings <br /> contained TPHg at concentrations up to 74 ppm. Groundwater from the borings contained up to <br /> 27,000 ppb TPHg and 11,000 ppb benzene A site conceptual model (SCM) was prepared for the <br /> site following the investigation This investigation is documented in our November 15,2004 Site <br /> Investigation Report, Site Conceptual Model, and Work Plan <br /> A quarterly groundwater monitoring and sampling program has been in place at this site since <br /> February 1992 Depth to water at this site has ranged from approximately 17 to 40 fbg and <br /> groundwater flow direction has been predominantly to the east/southeast <br /> INVESTIGATION RESULTS <br /> Personnel Present• Cambna geologist Jacquelyn England and scientist Rowan <br /> Fennell directed the field activities, working under the <br /> supervision of California Professional Geologist Joe Neely <br /> 1399 3 <br />