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concentrations up to 31,300 µg/L. This investigation is documented in our December 20, 2000 Site Investigation Report. During November 2001, Cambria advanced three CPT borings to further assess the vertical and horizontal extent of petroleum hydrocarbons beneath the site. Soil from these borings contained TPHg at concentrations up to 12 mg/Kg and benzene at concentrations up to 0.084 mg/Kg. Groundwater from these borings contained TPHg at concentrations up to 47,000 mg/Kg and benzene at concentrations up to 19,000 parts per billion (µg/L). Well MW-16 was also properly destroyed on November 15, 2001. This investigation is documented in our December 13, 2001 Site Investigation Report. During August 2002, Cambria installed six deep zone monitoring wells to further assess the vertical and horizontal extent of petroleum hydrocarbons beneath the site. No soil samples were collected from these borings. This investigation is documented in our October 2, 2002 Site Investigation Report/Groundwater Monitoring Report—Third Quarter 2002. During August and September 2004, Cambria advanced t�o CPT borings to further assess the vertical and horizontal extent of petroleum hydrocarbons) beneath the site. Soil from these borings contained TPHg at concentrations up to 74 mg/Kg. Groundwater from the borings contained up to 27,000 µg/L TPHg and 11,000 gg/L benzene. A site conceptual model (SCM) was prepared for the site following the investigation. This investigation is documented in our November 15,2004 Site Investigation Report, Site Conceptual Model, and Work Plan. During October 2005,Cambria installed four deep zone monitoring wells(MW-3-79,MW-3-119, MW-10-81, and MW-10-117) to further assess the vertical and horizontal extent of petroleum hydrocarbons beneath the site. TPHg was detected in soil samples collected from boring MW-10-117 concentrations up to 4.5 mg/Kg. Benzene was detected in soil samples collected from boring MW-10-117 at concentrations up to 1.2 mg/Kg. TPHg, total petroleum hydrocarbons as diesel, and benzene were detected in groundwater samples collected from the wells at concentrations up to 13,000, 720, and 8,600 µg/L, respectively. This investigation is documented in our December 16, 2005 Site Investigation and Groundwater Monitoring Report— Fourth Quarter 2005. A quarterly groundwater monitoring and sampling program has been in place at this site since February 1992. Site Remediation: Separate phase hydrocarbons (SPH) had historically been detected in well MW-1, but no measurable SPH has been observed since March 1993. From May 1989 to December 1989, approximately 45 gallons of SPH were recovered from well MW-1. An SVE