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Manteca Unified School District <br /> Soil&Groundwater Investigation Report <br /> Page:2 <br /> With a 2 inch continuous core barrel, Boring B-2 was drilled inside the shop building to <br /> the south west of the former diesel dispenser to a depth of 24 feet with no odor or soil <br /> discoloration encountered. Laboratory soil samples were collected and analyzed from the <br /> 8, 16, and 24 foot depths. Low levels of diesel were present in all of the samples. A <br /> water sample was collected from this boring because of the larger diameter bore hole. <br /> The water sample contained trace levels of diesel. No BTEX was detected in either the <br /> soil or water samples. <br /> Again, with a 2 inch continuous core barrel Boring B-3 was drilled inside the shop <br /> building, north west of the former diesel dispenser, to a depth of 24 feet with no odor or <br /> soil discoloration encountered. Laboratory soil samples were collected and analyzed <br /> from the 8, 16, and 24 foot depths. Low levels of diesel were present in all of the <br /> samples. A water sample was collected from this boring and contained trace levels of <br /> diesel. No BTEX was detected in either the soil or water samples. <br /> he ground:atar <br /> pies were collected by driving a hydropunch type well screen from <br /> 20 to 24 feedept . <br /> V <br /> Table of Laborato Soil Sample Results 12-6-2000) <br /> Sample I.D. Diesel Benzene Toluene E-Benzene Xylenes <br /> B-1-10' 5.5 ND ND ND ND <br /> B-1-15' 7.8 ND ND ND ND <br /> B-1-20' 3.5 ND ND ND ND <br /> 13-1-30' 4.8 ND ND ND ND <br /> 13-2-8' 4.2 ND ND ND ND <br /> B-2-16' 3.9 ND ND ND ND <br /> B-2-24' 7.3 ND ND ND ND <br /> B-3-8' 5.6 ND ND ND ND <br /> B3-16' 3.8 ND ND ND ND <br /> B-3-24' 68.1. ND ND ND ND <br /> V <br /> ND=NON-DETECT Mg/Kg for diesel µg g for BTEX <br /> Table of Laboratory Groundwater Sample Results 12-6-2000 <br /> Sample I.D. Diesel Benzene I TolueneLE-Benzene Xylenes <br /> B-1 NA NA I NA J NA NA <br /> B-2 0,54 ND ND ND ND <br /> fi B-3 0.21 ND ND ND ND <br /> ND=NON-DETECT Mg/L for diesel µg/L for BTEX <br /> V <br /> 2.1 Drilling <br /> V <br /> The soil boring was accomplished using a mobile mounted Geoprobe® Systems <br /> drilling rig, Model 5400, employing the use of a 1.25" or 2" hollow probe rods. All <br /> drilling equipment was thoroughly steam cleaned before drilling began to prevent <br /> V <br />