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' 110 Second Avenue South,#ED7,Pacheco,CA 94553-5560 MCCAMPBELL ANALYTICAL INC. - Telephone:925-798-1620 Fax :925-798-1622 hUp://www,mcgamphrll,comE-mail:main@mccarnpbell.com Advanced GeoEnvironmental Client Project ID: Geweke Date Sampled:02109-02110199 ' 4005 North Wilson Way Date Received: 02/12/99 Stockton, CA 95205 Client Contact: Kevin McKibben Date Extracted: 02112-02/17/99 ' Client P.O: Date Analyzed: 02/12-02118199 ' Gasoline Range(C6-C12)Volatile Hydrocarbons as Gasoline*,with Methyl tert-Butyl Ether* &BTEX* EPA methods 5030,modified 8015,and 8020 or 602;California RWQCB(SF Bay Region)method GCFID(5030) Lab ID Client ID Matrix TPH(g)+ MTBE Benzene Toluene Ethylben- Xylenes %Recovery zene Surrogate ' 03309 P24-40 S ND ND ND ND ND ND 104 03310 P24-50 S ND ND ND ND ND ND 104 ' 03311 P25-35 S II00,a ND<10 3.1 58 29 160 100 ' 03312 P25-45 S 1200,b,j ND<1 0.43 9.7 9.0 160 120 03313 P26-30 S 120,b,j ND<O.1 0.045 1.0 0.96 7.9 98 ' 03314 P26-25 S ND ND ND ND ND ND 103 03315 P26-35 S 1000,b,j ND<l 0.51 16 13 120 107 ' 03316 P26-45 S 54,b ND<O.1 ND 0.17 0.078 1.7 104 03317 P27-22 S 280,b ND<l ND<0.05 1.1 1.9 2I 98 ' 03318 P27-37 S 1700,a ND<10 6.8 120 49 230 106 03319 P27-48 S 1O,b ND ND 0.025 0.016 0.39 104 1 03320 P27-55 S 6.4,e/j ND ND 0.005 ND 0.036 100 ' Reporting Limit unless W 50 ug/L 5.0 0.5 0.5 0.5 0.5 otherwise stated;ND means not detected above the reporting limit S 1.0 mg/kg 0.05 0.005 0.005 0.005 0.005 ' *water and vapor samples are reported in ug/L,wipe samples in ug/wipe,soil and sludge samples in mg/kg,and all TCLP and SPLP extract in ug/I "cluttered chromatogram;sample peak coelutes with surrogate peak ' `The following descriptions of the TPH chromatogram are cursory in nature and McCampbell Analytical is not responsible for their interpretation: a) unmodified or weakly modified gasoline is significant; b) heavier gasoline range compounds are significant(aged gasoline?); c) lighter gasoline range compounds (the most mobile fraction) are significant; d) gasoline range compounds having broad ' chromatographic peaks are significant; biologically altered gasoline?; e) TPH pattern that does not appear to be derived from gasoline (stoddard solvent?);f)one to a few isolated peaks present;g) strongly aged gasoline or diesel range compounds are significant;h)lighter than water immiscible sheen is present;i)liquid sample that contains greater than--5 vol.%sediment;j)no recognizable pattern. ' DHS Certification No. 1644 /V Edward Hamilton,Lab Director