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CASE NARRATIVE SACRAMENTO PROJECT NUMBER G5C070225 General Comments The samples were received shortly after sampling at 16°C shortly after sampling. The test for Title 22 Bioassay was performed by Aquatic Testing Labs. SOLID, 8260B, VOCs, Medium Level Sample: 1 The laboratory control sample and laboratory control sample duplicate (LCS/LCSD) has 12- bromo-3-chloroprop e, naphthalene and 123-trichlorobenzene below the percent recovery criteria. The LCS/LCSD also has n-propylbenzene above the percent recovery criteria. Since these are not laboratory control compounds the data is reported with no further action. SOLID, 8015 MOD TPHD+MO Sample: 1 The sample and the spikelmatrix spike duplicate (MS/MSD) could not be concentrated to the method reco nded volume of 3 ml. The extracts were concentrated to 30 ml instead. Reporting ' is were adjusted accordingly. SOLID, 8270C, BasoNeutrals and Acids Sample: 1 Due to the sample matrix IOg of sample was used instead of the method recommended 30g. Also the sample could not be concentrated to the method recommended volume. The extract was concentrated to 12 ml instead. Reporting limits have been adjusted accordingly. Also a laboratory con of sample duplicate was prepared instead of a MS/N4SD due to the sample matrix. SOLID, Title 22 metals excl Hg Sample: 1 The MS/MSD recovees for antimony, molybdenum, nickel and selenium were outside of stated control limits. �he recoveries for these analytes in the laboratory control sample (LCS) were all within control and the relative percent difference (RPD) between the MS/MSD was within control, the data is therefore accepted. The MS recoveries fob chromium and copper were outside of stated control limits. The recoveries for these analytes in the LCS were all within control and the RPD between the MS/MSD was within control, the data is therefore accepted. G5C070225 I STL Sacramento (916) 373 - 5600 1 of 67