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1 Ms Vicki McCartney Project No 880040 1 A 02010000 • August 31, 2005 Page 2 10� Five Direct Push (DP) borings (GP-I through GP-5) were made in August zoos! The borings were advanced to groundwater and a discrete water sample was collected from each Three groundwater monitoring wells (MW-1 through MW-3) were installed in September 2000 (Figure 1) Quarterly groundwater monitoring and sampling was initiated in September 2000 In May 2002, one deep soil boring was made and two shallow soil bonngs were made and converted into monitoring wells MW-4 and MW-5 A dual phase extraction (DPE) test was conducted from June 10 through 15, 2002 The DPE test was conducted by simultaneously extracting soil vapor and groundwater from well MW-I Four cone penetration tests (CPT) were made in September 2003 Discrete groundwater samples collected from HydroPunch"� borings mad adjacent to the CPT borings indicated the presence of methyl tert'butyl ether (MTBE) and benzene in groundwater northeast of the property beneath a city street In October 2004, Shaw submitted the Corrective Action Plan for Parkinson 's Hammer I- 5 Arco (CAP) The CAP was tentatively approved, pending results of a deeper monitoring well located in the street east of the station and submission of contaminant mass calculations These activities are currently in progress Routine groundwater monitoring has been performed at the site since September 2000 IThere are five groundwater monitoring wells at the site, all with total depths of approximately 24 feet GROUNDWATER MONITORING On July 18, 2005, groundwater samples and depth-to-water data were collected from monitoring wells MW-1 through MW-5 Groundwater samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, xylenes I (BTEX), 1,2-dibromoethane (EDB), 1,2-dichloroethane (1,2-DCA), and for five gasoline SHAW ENVIRONMENTAL,INC C 1Documcnts and Scttungs\Ar tdomch\DeskioplARCO13Q05 do(