Laserfiche WebLink
0 CAMBRIA <br /> SITE INVESTIGATION WORK PLAN <br /> Site Background <br /> i <br /> The site is currently a non-operating gasoline station located on the southeast corner of the <br /> intersection of Victor Road and Beckman Road in Lodi, California (Figure 1) The site layout <br /> includes a service station building, two dispenser islands, a fuel UST complex, and a waste oil <br /> tank (Figure 2) <br /> Previous Investigations- During December 1994, four single-walled steel USTs (two 10,000- <br /> gallon and two 6,000-gallon) and associated product piping were removed Petroleum <br /> hydrocarbons were detected in soil samples collected from beneath the former dispenser <br /> islands and product piping and in the southeastern half of the UST excavation Fugro West, <br /> Inc (Fugro) of Roseville, Califorrnia performed over-excavation beneath the dispenser area <br /> and UST complex and collected additional soil samples One soil sample collected from the <br /> bottom of the UST excavation contained 1,000 parts per million (ppm) TPHg, and one soil <br /> sample collected from the northern sidewall of the dispenser excavation contained 2 7 ppm <br /> TPHg Complete results of the UST removal are documented in the Fugro April 19, 1995 <br /> Underground Storage Tank Closure Report <br /> During February 1996, Enviros, Inc (Enviros) drilled two GeoProbe' borings in the vicinity <br /> of the UST complex to investigate the extent of petroleum hydrocarbons detected during the <br /> December 1994 tank removal activities Enviros drilled one angle boring beneath the UST <br /> complex and one vertical boring adjacent to the UST complex Soil samples collected from <br /> the two borings did not contain detectable concentrations of petroleum hydrocarbons but did <br /> contain MTBE at concentrations up to 29 ppm This investigation is described in Enviros' <br /> May 8, 1996 Soil Boring Installation Report <br /> During January 1999, Cambria drilled five soil borings in the vicinity of the UST complex <br /> TPHg was detected only in only one boring at a concentration of 3 17 ppm No benzene was <br /> detected in any of the soil borings MTBE was detected (by EPA Method 8260) in all borings <br /> at concentrations ranging from 0 00807 to 92 9 ppm Groundwater samples were collected <br /> from two of the borings and they contained TPHg ranging from 6,610 to 46,000 parts per <br /> billion (ppb), benzene from 63 6 to 243 ppb, and MTBE from 8,050 to 28,000 ppb These <br /> results are summarized in Cambria's June 9, 1999 Site Investigation Report <br /> 0955 3 <br />