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' Rtpona Market Vertical Groundwater Investigation II Report Page 7 MTBE Confirmed if present by Method 8260 $ 3i�Drj� Table of Laboratory Water Sample Results ) Sam le I D Gasoline Benzene Toluene E-BenzenL_j Xylenes Ox mates ' MW-5 I <005 <03 <03 <03 1 <06 ND ND=Non Detect NA=Not Analyzed, Gasoline reported in Mg/L BTEX and Oxygenates in pg/L Groundwater Elevations 08/31/05 Well Collar Elevation DTW GW Elevation MW-1 6328 2706 3622 MW-2 6359 2732 3627 MW-3 638 2759 3621 MW-4 6352 273 36 22 MW-5 16318 12732 35 86 2.1 Drilling ' Permits were obtained as necessary for all bonngs before drilling began The soil boring was accomplished using a mobile mounted drilling ng employing the use of 10 inch - and 8 7/8 inch o d hollow stem flight augers All drilling equipment was thoroughly steam-cleaned before drilling began, to prevent the introduction of contamination from off site, and between bonngs to prevent cross contamination The borings were logged under the direct supervision of a registered professional ' using the Unified Soil Classification System The color, texture, moisture, plasticity (if applicable), consistency of the earth materials, pertinent soil or bedrock characteristics, and any evidence of contamination will be noted All ' water-bearing zones and the depths at which they were encountered are noted on these logs Upon termination, the boring was completed as a deep monitoring well with as five foot screen and backfilled with concrete grout, after a Bentonite ' seal has been placed The cuttings from the drilling operation were containerized on-site during drilling for proper disposition The proper method of disposal will be dependent upon results of laboratory analysis. This disposal will be the responsibility of the client unless other arrangements are made 2.2 Soil Sampling All soil sampling equipment was thoroughly steam-cleaned before and between sampling to prevent cross contamination Relatively undisturbed soil samples