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+r United States Postal Service Stockton itl&de Maintenance Facility <br /> The approximate boring locations and a typical angled boring diagram are shown on <br /> Figures 2 and 3, respectively. Soil sampling protocol and boring logs are presented in <br /> Appendix A. <br /> �. 2.2 Soil Sample Collection and Analyses <br /> Twelve soil samples were selected for submittal to a state-certified analytical <br /> Iaboratory. The laboratory analytical pian used is presented in Table 1. These <br /> analyses were selected to help evaluate soil quality beneath the corresponding area. <br /> Table 1. Laboratory Analytical Plan <br /> Boring No.of 5 . 5 LUFT <br /> Boring Location Number Samples TPHg TPHd BTEX Oxy's* TRPH Metals- VOCs <br /> L. EPA Test Method 8015M 8015M 8020 8260 418.1 6010 8010 <br /> Gasoline USTs EB-3 2 ✓ ✓ ✓ ✓ <br /> Diesel UST F13-1 2 ✓ ✓ ✓ ✓ <br /> i.. Waste Oil UST EB-5 2 ✓ ✓ ✓ ✓ ✓ ✓ ✓ <br /> Diesel Dispenser <br /> ✓ j ✓ i ✓ ✓ <br /> and Piping EB-2 3 <br /> Waste Oil Piping € S-1 &-S-2 2 ✓ ✓ ✓ ✓ ; ✓ ,r <br /> Motor Oil Piping S-3 1 ✓ ✓ ✓ <br /> ✓ Laboratory analysis performed <br /> * 5 fuel oxygenates = MTBE, RIPE, ETRE, TAME, and TBA <br /> 5 LUFT Metals = Cadmium, Chromium, Lead, Nickel, Zinc <br /> Analytical results are presented in Table 2. Copies of the analytical reports and chain <br /> iL.. of custody documentation are presented in Appendix B. <br /> Table 2. Analytical Results of Selected Soil Samples <br /> �.. (concentrations in parts per million) <br /> Boring Depth MTBE,DIPE, 5 LUFr <br /> Number (feet) TPHg TPHd BTEX ETBE,TAME TBA TRPH Metals VOCs <br /> FB-1 241/z-25* 11.0 11.0 10.005 1 10.005 <0.020 -- -- -- <br /> EB-1 291/2-30* <1.0 <1.0 <0.005 <0.005 <0.020 -- -- -- <br /> �+ E13-2 91/2-10* <1.0 <1.0 <0.005 <0.005 <0.020 -- -- -- <br /> EB-2 141/2-15* <1.0 <1.0 <0.005 <0.005 <0.020 -- -- -- <br /> EB-2 191/2-20' <1.0 <1.0 <0.005 <0.005 <0.020 - -- -- <br /> EB-3 241/2-25' <1.0 <1.0 <0.005 <0.005 <0-020 -- -- -- <br /> EB-3 291/2-30* 1 <1.0 <1.0 <0.005 <0.005 <0.020 -- - -- <br /> EB-5 241/2-25* <1.0 <1.0 <0.005 <0.005 <0.020 <25 ** ND <br /> .. E13-5 291/2-30* <1.0 <1.0 <0.005 <0.005 <0.020 <25 '* ND <br /> S-1 4-41/2 <1.0 4.8 <0.005 <0.005 <0.020 <25 ** ND <br /> S-2 4-41/2 <1.0 <1.0 <0.005 1 <0.005 <0.020 <25 ** ND <br /> S-3 4-41/2 -- <1-0 <0.005 1 -- <25 -- -- <br /> < indicates that the compound was nor detected at or above the stated laboratory reporting limit <br /> ' Depth of sample at an angle of approximately 30° from vertical (for vertical depth, multiply by .566) <br /> *' Concentrations did not exceed the Residential Preliminary Remediation Goal-EPA Region 9, 1999: <br /> r.. Cadmium (9.0 ppm), Chromium (210 ppm), Lead (400 ppm), Nickel (150 ppm), Zinc(23,000 ppm) <br /> -- Not Analyzed <br /> L& <br /> LOWNEYiATES Page 3 <br /> Environmental!Geotechnical 1 Engineering Services 864-76 <br /> Lr <br />