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E Po <br /> mbo Property <br /> Subsurface Investigation <br /> On September 16, 1998 M.J. Kloberdanz & Associates drilled 8 GeoprobO' soil <br /> + borings to five feet below groundwater (average depth 15' bgs). A soil sample <br /> was obtained from the capillary fringe in s ven of the eight borings. Additional <br /> soil samples were collected from cores with possible contamination. Water <br /> samples were collected from all eight borings. <br /> Boring B-1 was drilled in an area of a small pesticide spill identified by the <br /> property owner. Petroleum analysis was included in some of the samples because <br /> of the close proximity to the fuel storage ea. Borings B-2, 3, & 4 were drilled <br /> around the above ground fueling area with boring B-3 located at a former <br /> underground tank excavation. Boring B-5 was also drilled in the area of a <br /> previously removed underground fuel tank. Boring B-6 was drilled in the Truck <br /> and Tractor wash area and sampled for esticides and petroleum compounds. <br /> Boring B-7 was drilled in a location where above ground fuel was stored and used <br /> historically. Boring B-8 was drilled in front of the barn at 24124 Lammers Road <br /> where refrigeration equipment is dismantled. Since there was no apparent <br /> spillage or dumping of refrigerants, only groundwater was sampled and analyzed. <br /> Soil and Groundwater Laborato Sample Results (September 16, 1998 <br /> Sample I.D. TEPH Gas Benzene Toluene -Benzene Xylenes MTBE 8260 Pest. 601 <br /> B-1-10' ND <br /> B-1-15' ND ND ND ND ND ND ND <br /> B-1-17'1420 ND ND ND ND ND ND2 ND <br /> B-2-10' ND ND ND ND ND ND ND <br /> B-2-15'1420 ND ND ND ND ND ND ND ND <br /> ND ND NDND ND ND <br /> ND $ ;10 Q? f3... . 0 ..„ X40[1 .non:;..';€ <br /> ND +. 3 t ... .:: :240iy .. . :I3d .....19(it3'; <br /> B-4-10' ND ND ND ND ND ND ND <br /> ND 6 9 11 . ::. :: ND <br /> ND ;.; ND 4°'. ....... ' I1(} ND <br /> B-5-15' ND ND ND ND ND ND ND <br /> ND 3"3. ... .-:;.. .,3. ,'. >< 3 . .'>1 ND ND <br /> B-6-5' ND ND ND ND ND ND ND ND <br /> B-6-10' ND ND ND ND ND ND ND <br /> B-6-15'1420 ND ND ND ND ND ND ND ND ND <br /> B-7-10' ND ND ND ND ND ND ND <br /> l ' O ] n�31 ':otl, ND ND ND ND ND ND ND <br /> B-8-17'H 0ND <br /> Note: ND=Non Detect Blank Space=Not Analyzed <br /> Gasoline&Diesel Reported as mg/Kg(or mg/L for water), <br /> BTEX&Oxygenates Reported as pg(Kg(orµgll,for wat ) <br /> *not confirmed by method 8260 * *confimied for MTBE by method 8260 <br /> Additional soil borings with the Geoprobe® were suggested for the areas indicated <br /> on the Figure 4 Proposed Boring Locatior Map included in our October report. <br /> San Joaquin County Environmental Health has since indicated in their letter dated <br /> December 8, 1998 that no further assessment of the tank area B-5 will be <br /> required. They did require the vertical and lateral definition of the contamination <br /> 2 <br /> i <br />