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1 2004 sampling laboratory findings are included herewith Reference ATTACHMENT 4, EXTRACTS FROM ANALYTICAL LABORATORY FINDINGS- December 2003 ' During the December 2004 sampling, the "diesel" fraction was detected at levels between <0 05 and 0 87 mg/ltr Levels in MW No 1, the original MW installed in ' December 2000, continued to increase from 0 47 mg/ftr recorded 6 months earlier in March 2004 to 0 87 mg/Itr Levels in MW No 2 decreased from 0 50 mglltr recorded 3 months earlier to 0 33 mglltr Results are listed separately in the last page of the ' ATTACHMENT 2, "SITE CHARACTERIZATION -SUMMARY OF LAB RESULTS Soil Qualify Sod contamination from petroleum hydrocarbons was found in several areas of varying depth and concentrations Levels of BTEX were detected in previous exploration in the 10 to 15 FT bgs zone along the east fence at less than 100 ug/kg 1 and at a deeper 25 FT bgs at levels of 688 ug/kg of Xylene During earlier testing in March 1999, Galardo identified considerable BTEX in BH No B-1 in the vicinity of 1 later installed MW No 1 and in BH No 2 near the east fence Diesel contaminated soil was found near MW No 4 particularly in the 25 to 30 FT bgs ' zone and MW No 2 near the east fence in June 2002 Earlier borings by Gallardo and Barger found diesel at the 13,000 to 15,000 mg/kg levels in the same area Earlier bonngs by Gallardo and Barber found concentrations of upwards to 30,000 mg/kg in the vicinity of MW No 1 and BH No B-1 at similar depths ' Review of previous geological findings and field findings in June supported the contention that there was dispersion of diesel in the 25 FT to 35 FT bgs zone atop an aquatard, possibly with earlier perched waters Perched waters were not found at this ' depth by Stellar or Barber in December 2000 or the later June 2002 exploration Near the east fence during construction of MW No 2 in June 2002, minor seepage of ' product (diesel like) and shallow water were apparent in the upper 0 to 10 FT bgs stratum ' RECECENT FINDINGS DURING SHALLOW EXCAVATIONS Shallow soil was sampled November 22, 2004 between the existing AST (MW No 1 1 and the eastern property line including the area surrounding MW No 2 Resufts are attached as a separate summary Diesel and motor oil fractions were found ranging between 6 mg/kg to as high as 14,000 mg/kg Trenching, by WOS, in the area ' between MW No 2 (east fence line and the concrete block wall secondary containment area between MW's No 1 and No 6 in November 2004 revealed ground contamination levels upwards to 11,000 ppm of diesel (C10-C28) and ' 14,000 ppm of motor oil (C16-C36) type extractable hydrocarbons This area is important to WOS for material handling at the Acampo facility Please reference ATTACHMENT 8, FIELD INVESTIGATION SHALLOW SOIL, 22 November ' 2004 4