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d-01-1997 8 48AM FROM AGE NC 209 956 0700 P d <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services P 0 Bax 1360 Winton CA 95388 Phone (2091 384-2930 <br /> Certificate#2079 Fax (209) 384-1507 <br /> Advanced GeaEnvvonmental Inc Client Project ID Comfort Air Inc Sampled 2-20 97 <br /> of Northern Calrlorrna Reference Number 1023 Recumod 2-21 97 <br /> 1803 West March Lane Suite A Sample Description water Extracted 2 2&-97 <br /> Stockton, CA 95207 Sample Prep/Analysis Method EPA 5030/8015 8020 Anelyred 2-24-97 <br /> Attn TFm Cuellar Lab Numbers 1023.1 W, 2W, 3W 4W 5W Reported 3-3-97 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE 10 SAMPLE ID <br /> MW-1 MW-2 MW 3 MW-4 MW 5 <br /> (ug/L) lug/Ll (ug/L1 tug/1-1 (ug/L) tug/L) <br /> MTBE 050 ND ND ND ND ND <br /> BENZENE 060 4700 99 5200 2 7 074 <br /> TOLUENE 050 1000 71 1600 0 78 ND <br />• ETHYL BENZENE 0 50 1000 is 560 082 NO <br /> TOTAL XYLENES 050 1200 56 2200 9 57 061 <br /> GASOLINE RANGE <br /> HYDROCARBONS 10 27000 1200 31000 ND 77 <br /> Report Limit Multiplication Factor 100 5 100 1 1 <br /> Surrogate % Recovery f,0,09%r ho,vx n@99 o w r ho 9a.x no,oa7,i rm,v,R n0 oax *9+02% FlO 0G 4%f h0 M a+c <br /> Instrument ID VAR-GC1 VAR-OCt VAR-GC1 VAR-GC1 VAR-GC1 <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Analytes reported a5 NO were not detected or below the Practical Quantitation Limit <br /> ANALYST APPROVED BY <br /> Clan J Cone Jy6ws C Floulkps <br />. nvrrvnr wnrsl Lab Drrecror <br />