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NftmMUM VERIFICATION LABORATORY ArrrtLYSIS All analyses methods are designated EPA methods described in EPA SW 846, Thud Edition. Those methods not found in SW 846, are specifically noted below. Refer to the "SWRCB LUFT Field Manual", Appendix A-20, Table 3-5 for detection limits of motor vehicle fuels (gasoline and diesel). Refer to 1-2-3 "Regional Board Staff Recommendations for Initial Evaluation and Investigation of UST's" for the waste and motor oil detection limits. Detection Limits that remain below the MCI, STLC or Allowable Limit of the contaminant in question will be accepted, however laboratory shall utilize the most conservative method. TPH-G Total Petroleum Hydrocarbon, Gasoline, GC/FiD (5030) 8015 mod or GC/MS 8260 TPH-D Total Petroleum Hydrocarbon, Diesel, GC/FID (3550), 8015 mod or GC/MS 8260 BTX & E Benzene, Toluene, Xylene & Ethyl Benzene, GC/PID 8020 or GC/MS 8260 CL HC Chlorinated Hydrocarbon, GC/HSD 8010, GC/MS 8240 TOTAL LEAD M N'Wwsm� Ethylene dibromide (DHS -AB 1803), GC/MS 8240 (DHS-LUFT) GC -FID Gas Chromatography, Flame Ionization Detection ICAP or AA Inductively Coupled Plasma Atomic Emission Spectrometry 6010 or Atomic Absorption [IMM PCB Polychlorinated Biphenyls, GC/MS 8270 or 8080 Method 3050 Acid digestion Method 3540 Soxhlet sample preparation Method 3550 WN Method 5030 Purge and trap sample preparation QA/QC Quality Assurance/Quality Control All analyses methods are designated EPA methods described in EPA SW 846, Thud Edition. Those methods not found in SW 846, are specifically noted below. Refer to the "SWRCB LUFT Field Manual", Appendix A-20, Table 3-5 for detection limits of motor vehicle fuels (gasoline and diesel). Refer to 1-2-3 "Regional Board Staff Recommendations for Initial Evaluation and Investigation of UST's" for the waste and motor oil detection limits. Detection Limits that remain below the MCI, STLC or Allowable Limit of the contaminant in question will be accepted, however laboratory shall utilize the most conservative method. TPH-G Total Petroleum Hydrocarbon, Gasoline, GC/FiD (5030) 8015 mod or GC/MS 8260 TPH-D Total Petroleum Hydrocarbon, Diesel, GC/FID (3550), 8015 mod or GC/MS 8260 BTX & E Benzene, Toluene, Xylene & Ethyl Benzene, GC/PID 8020 or GC/MS 8260 CL HC Chlorinated Hydrocarbon, GC/HSD 8010, GC/MS 8240 TOTAL LEAD Total lead, AA 7420, AA 7421 or ICP -AES 6010 EDB Ethylene dibromide (DHS -AB 1803), GC/MS 8240 (DHS-LUFT) GC -FID Gas Chromatography, Flame Ionization Detection ICAP or AA Inductively Coupled Plasma Atomic Emission Spectrometry 6010 or Atomic Absorption Spectrometry 7000. Metals: Cadmium, Chromium III and VI, Lead, Zinc and Nickel. PCB Polychlorinated Biphenyls, GC/MS 8270 or 8080 Method 3050 Acid digestion Method 3540 Soxhlet sample preparation Method 3550 Sonication sample preparation, extraction method Method 5030 Purge and trap sample preparation QA/QC Quality Assurance/Quality Control Notes: To avoid false positive detection of benzene, benzene -free solvents are to be used. Fused capillary columns are preferred to packed columns; a packed column may be used as a "first cut" with "dirty" samples or once the hydrocarbons have been characterized and proper QA/AC is followed. For Drinking water sources, EPA recommends that the 500 series for volatile organics be used in preference to the 600 series because the detection limits are lower and the QA/QC is better. Samples exhibiting any level of heavy metal contamination may require further analysis. PHS-EHD recommends holding these samples until disposal is indicated. EH 23 048 (Revised 7/10/92) Page 8