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DEPARTMENT OF TOXIC SUBSTANCES CONTROL HAZARDOUS MATERIALS LABORATORY - GC/MS ANALYTICAL SECTION GC/MS ANALYTICAL REPORT FOR NON -TARGET COMPOUND ANALYSIS - VOLATILE ORGANIC ANALYSIS HML SAMPLE NUMBER(S): 960306 COLLECTOR'S NUMBER(S): PL8196 COLLECTOR'S NAME: ALAN K. ITO SAMPLING SITE: P -N -L CONCRETE PRODUCTS 1900 ROSEVELT AVE. ESCALON AUTHORIZATION NUMBER: HMM2966 METHOD: Initially each sample was analyzed for target volatile organic compounds by EPA Method 8260. A Tekmar Purge and Trap apparatus was used to isolate the volatile compounds. Mass spectra of chromatographic peaks which were not identified as target compounds were compared by a computer against 42,000 reference spectra in a mass spectral data base published by the National Bureau of Standards (NBS). Usually the resulting identification are tentative since pure reference compounds are often not available for direct comparison. Page 1 of 1. GC/MS REPORT FOR NON—TARGET COMPOUNDS ANALYSIS --- VOLATILE ORGANICS*mem344) Estimated HML No. Collector's Retention Conc. Level*4 No. Time(min.) Compounds Detected** mg/L 960306(*) PL8196 (oil) 11:39 C7 hydrocarbon 55 16:33 unknown 200 17:34 C10 alkane 1,100 18:01 C10 alkane 330 18:31 C12 hydrocarbon 240 19:21 unknown 720 19:40 C10 hydrocarbon 180 20:15 unknown 250 20:34 unknown 150 21:00 unknown 220 21:10 unknown 170 21:27 unknown 110 22:16 unknown 94 22:44 unknown 120 23:57 unknown 130 *Comment: This sample contains a high concentration of non—target compounds. Tentative compound identification by computer search is not possible in most cases because the sample chromatogram is unresolved at Method 8270 conditions. **NON -TARGET COMPOUNDS ARE THOSE NOT CURRENTLY ON THE TARGET COMPOUND LIST FOR HML METHOD 8260. (See attached report for results of target compound analysis). NOTE: (1) Unknown exhibited mass spectral and chromatographic properties which were identical to those of authentic compound analyzed under identical conditions. (2) Unknown exhibited some mass spectral and/or chromatographic properties which are consistent with proposed identity. (3) Identification are tentative and are based on comparison of the sample mass spectra with 42,000 reference spectra in the EPA/NIH Mass Spectral Data Base compiled by the NBS. (4) For comparison purposes, unknown non -target compound levels are estimated based on the RIC area of the unknown chromatographic peak relative to the RIC area of internal standard used in the GC/MS analyses, usually pentafluoro- benzene, 1,4-difluorobenzene, chlorobenzene-d5 & 1,4 -dichlorobenzene -d4 ANALYST SIGNATURE: Orlando Garbin DATE: 9/30/96 SIGNATURE OF SUPERVISING CHEMIST: William S. Lum DATE: 9/30/96 AACROWM306OP.CP