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Inc. 110 2nd Avenue South PD7 Pacheco,CA 94553-5560 <br /> McCampbell Analytical, ITelephone 925-798 1620 Fax 925-798 1622 <br /> Website www mccampbell com E-mai] mamQmccan Abell com <br /> Advanced GeoEnvuonmental,Inc Client Project ID Flag City Chevron Date Sampled 03/28/05 <br /> Date Received 03/29/05 <br /> 837 Shaw Road <br /> Client Contact Tun Cuellar Date Extracted 04101105-04/05105 <br /> Stockton,CA 95215 <br /> [Client P O Date Analyzed 04/01105-04105105 <br /> Oxygenates and BTEX by GC/MS* <br /> Extraction Method SW5030B Analytical Method SW8260S Work Order 0503501 <br /> Lab ID 0503501-005B 0503501-006B 0503501-007B 0503501-008B <br /> Client ID MW-6A MW-6B MW-7 MW-$A Reporting Limit for <br /> DF=1 <br /> Matrix W W ' W W <br /> DF 1 1 1 10 S W <br /> Compound Concentration ug/kg µg/L <br /> tert-Amyl methyl ether(TAME) ND ND ND ND<5 0 NA 05 <br /> Benzene ND ND ND ND<5 0 NA 05 <br /> t-Butyl alcohol(TSA) ND ND ND 83 NA 50 <br /> Dnsopropyl ether(DIPE) ND ND ND ND<5 0 NA 0 5 <br /> Ethanol ND ND ND ND<500 NA 50 <br /> Ethylbenzene ND ND ND ND<5 0 NA 0 5 <br /> Ethyl tert-butyl ether(ETBE) ND ND ND ND<5 0 NA 0 5 <br /> Methanol ND ND ND ND<5000 NA 500 <br /> Methyl-t-butyl ether(MTBE) ND 1 5 74 400 NA 0 5 <br /> Toluene ND ND ND ND<5 0 NA 05 <br /> Xylenes ND ND ND ND<5 0 NA 05 <br /> Surrogate Recoveries(%) <br /> %SSI 103 101 102 103 <br /> %SS2 102 104 102 102 <br /> %SS3 115 117 112 117 <br /> Comments <br /> *water and vapor samples are reported in IgVL,soil/sludge/solid samples in mg/kg,producVoillnon-aqueous liquid samples and all TCLP&SPLP <br /> extracts are reported in mg/L,wipe samples in lig/wipe <br /> ND means not detected above the reporting limit,NIA means analyte not applicable to this analysts <br /> #surrogate diluted out of range or surrogate coelutes with another peak <br /> h)lighter than water immiscible sheen/product is present,i)liquid sample that contains greater than—1 vol %sediment,j)sample diluted due to high <br /> organic content/matrix interference,k)reporting limit near,but not identical to our standard reporting limit due to variable Encore sample weight,m) <br /> re2orting limit raised due to insufficient sample amount,n results are reported on a dry weight basis, see attached narrative <br /> DHS Certification No 1644 Angela Rydettus,Lab Manager <br />