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• Ms Margaret Lagorio Project No 880-040 IA January 27, 2003 Page 7 Concentrations of TPHg were reported in only one soil sample, SB Deep at 20-feet bgs, at 37 milligrams per kilogram (mg/kg) Benzene was reported in only one soil sample, SB Deep at 15-feet bgs, at a concentration of 0 079 mg/kg Benzene was not reported in any other subsurface soil samples MtBE was reported in all soil samples except SB Deep at 55-feet bgs at concentrations ranging from 0 66 mg/kg in well boring MW-5 at 15-feet bgs, to 5 8 mg/kg in boring SB Deep at 15-fect bgs TAME was reported in all soil samples from well borings MW-4 and MW-5 at concentrations ranging from 0 005 to 0 042 mg/kg, and in a soil sample from boring SB Deep at 15 feet bgs at a concentration of 0 074 mg/kg TBA was reported in soil from well boring MW-5 at 20 and 25 feet bgs at concentrations of 0 78 and 1 0 mg/kg, respectively Soil analytical data are summarized in Table 1, and laboratory analytical reports with chain-of-custody (COC) documentation are included in Attachment F -� Groundwater Sample Results Groundwater samples were collected from newly installed wells MW-4 and MW-5 on July 29, 2002, during the regularly scheduled Quarterly monitoring and sampling event TPHg were not detected in the wells Benzene was reported in well MW-4 at a concentration of 1 1 µg/L MtBE and TAME were reported in wells MW-4 and MW-5 at concentrations of 14,000 and 160 pg/L, and 18,000 and 150 gg/L, respectively ETBE was reported in well MW-4 at 8 8 �Lg/L, and TBA was reported in well MW-5 at 5,700 µg/L Recent and historical groundwater analytical data are summarized in Table 2, and recent data are presented on Figure 4 DPE and Feasibility Testing The DPE Test Report prepared by TRC Alton Geoscience is included in Attachment G .516y- lie +6y-lie l N lrancfp11Pro1ects\Protects1880104t}11a101101Assessment and Intenm Remedial Report doc