Laserfiche WebLink
• <br /> RIPONA MARKET <br />' 223 W. Washington Street, Ripon, California <br />' Subsurface Soil and Groundwater Investigation <br /> Report <br />' 1 0 PROJECT IDENTIFICATION <br /> The following scope of work conducted in order to help characterize the petroleum <br />' contamination disclosed during the underground tank removal at the above referenced <br /> property A Geoprobe was used to obtain soil and ground water samples for the <br /> preliminary characterization of the vertical extent of contamination <br /> I1 I Site Description and History <br /> I Two underground fuel tanks were removed on February 11, 1999 by SEMCO <br /> under permit Low levels of xylene were disclosed in laboratory soil samples <br /> collected at 13 feet in depth, primarily in the area of Tank 1 (TK-1) (Figure 2) <br /> I Moderately high levels of specific oxygenated compounds were present in the <br /> stockpiled soil that had surrounded the tanks Since no apparent contamination <br /> was noted during the removal this soil was placed back into the excavation <br /> Table of Laboratory Sam le Results (February 11, 1999) <br /> Sample I D Gasoline I Benzene I Toluene E-Benzene XS lens 1 8260 <br /> TK 1-S(a)l 5 ND ND ND ND ND ND <br /> TK 1-N(a)13 ND ND ND ND 47 ND <br /> TK2-S(a)U ND ND ND ND ND ND <br /> I TK 2-N0,15 ND ND ND ND ND ND <br /> SP-1 ND ND ND ND ND 190 mTBE 1200 t Buil <br /> SP-2 ND ND ND ND ND ND <br /> ND=Non Dett u Gasoline in mg/Kg 8260 in ag/Kg <br /> I2 0 SCOPE OF WORK <br /> On January 31, 2000 M J Kloberdanz & Associates drilled a single soil boring to 30 feet <br /> in depth Groundwater was measured at 29 feet below grade surface (bgs) The former <br /> tank excavation had been filled with the previously excavated soils and topped with about o <br /> eight feet of pea gravel so sampling started at ten feet in depth The boring was located <br /> near the center of the backfilled tank excavation (Figure 2 Site Map) <br /> i <br /> I <br />