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' Ripona Market Vertical Groundwater Investigation H Report Page 6 Soil samples were collected during the installation of MW-4 at 35, 50, and 60 feet and analyzed for gasoline, BTEX and MTBE All three samples were non-detect for the compounds analyzed A groundwater sample was collected on December 8, 2003 and ' analyzed for gasoline, BTEX and all of the Oxygenated compounds MTBE at a concentration of 0 9 µg/1_ was the only analyte detected Since the pH was high during sampling, indicating the mfluence of cement or Bentonite into the deeper aquifer Due to ' the possibility that the MTBE may have been introduced during drilling the well was redeveloped on December 12, 2003 Thirty gallons of water were removed during redevelopment and the pH lowered to 6 9 ' Table of Laboratory Soil Sample Results12- - { Q3 03 Sam le I D Gasoline I Benzene I Toluene E-Benzene I Xylenes MTBE MW-4-35' <1 0 <5 0 <5 0 <5 0 <5 0 <10 MW-4-50' <1 0 <5 0 <5 0 <5 0 <5 0 <10 MW4-60' <10 <5 0 <5 0 <5 0 <5 0 -10 ND=Non Detect NA=Not Analyzed, Gasoline reported in Mg/KS BTEX-MTBE in pg/Kg MTBE Confirmed if present by Method 8260 ' Table of Lab ratory Water Sample Results (12-12-03) Sample I D Gasoline Benzene Toluene E-Benzene I Xylenes IOxygenates MW-4 <0 05 <03 <0 3 <03 _<06 1 0 9 mtbe ND=Non Detect NA=Not Analyzed, Gasoline reported to Mg/L BTEX and Oxygenates in pg/L 2.0 SCOPE OF WORK 1 On August 24, 2005 M J KIoberdanz & Associates drilled a single soil boring between ' existing monitoring wells MW-1 and MW-3 (Figure 2) to a depth of fifty feet below surface grade (bgs) The well was completed with a five foot screen at depths of 45 to 50 feet A Geologic log of the new well, MW-5, is included as Appendix C The well was surveyed for elevation and included in calculation of groundwater flow Soil samples were collected during the installation of MW-5 at depths of 20, 25, 30 and 40 feet and analyzed for gasoline, BTEX, and MTBE Flowing sands precluded driving a tube sampler at depths below 40 feet All four samples collected were non-detect for the compounds analyzed A groundwater sample was collected on August 31, 2005 and analyzed for gasoline, BTEX and all of the Oxygenated compounds The sample was non-detect for all compounds analyzed Table of Laboratory Soil Sample Results 08/24/05) Sample I D Gasoline I Benzene I Toluene I E-Benzene Xylenes MTBE MW-5-20' <1 0 <5 O <5 0 <5 O <50 I <10 MW-5-25' <1 0 <5 0 <5 0 <5 0 <5 0 <10 MW-5-30' <1 0 <5 0 <5 0 <5 0 <5 0 <10 MW-540' <1 0 <5 0 <5 0 <5 0 <5 0 <10 ND=Non Detect NA=Not Analyzed, Gasoline reported in Mg(Kg BTEX-MTBE in pg(Kg f