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SUPERIOR ANALYTICAL LABORATORY, INC <br /> 1555 BURKE UNIT I . SAN FRANCISCO CA 94124 • PHONE (415) 647-2081 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> ' LABCRATORY NO. : 52'55 DATE RECEIVED 03/09/90 <br /> CLIENT Leedshill - Herkenhoff, Inc. DATE REPORTED 03/16/90 <br /> CLIENT JCB NC. - 93 52. 12 <br /> AN;LYSIS FOR TOTAL PETRCLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 5030 and 8015 <br /> LAB Concentration (mg/kg) <br /> _x-- <br /> Sample Iden Identification Gasoline Rance <br /> - - <br /> 2 S821-10 ND< 1 <br /> 4 SB21-20 ND< 1 <br /> 6 SB21-30 ND< 1 <br /> 8 SB22-10 ND< 1 <br /> 9 SB22- 15 1700 <br /> 10 S8221-20 ND< 1 <br /> 11 5822-25 1 <br /> 12 5822-30 ND< 1 <br /> 14 SB22-40 ND< 1 <br /> 15 5822-45 3 <br /> 1S SB-22-50 ND; 1 <br /> - ' 18 S822-60 ND< 1 <br /> 20 S823-10 ND< 1 <br /> 21 SBL'- 15 ND1111 <br /> 22 SB23-20r ND< 1 <br /> 2; SB23-25 ND< 1 <br /> 24 SB23-30 ND< 1 <br /> 26 SB213-40 ND< 1 <br /> ' 23 SB23-50 ND< 1 <br /> 30 SB23-60 ND< 1 <br /> mg/kg - parts per million (ppm) <br /> Minimum Detection Limit for Gasoline 3n Soil : 1mg/l.g <br /> QAQC Summary- <br /> Daily Standard run at 2mg/L: RPD Gasoline = < 150 <br /> MS/1-ISD Average Recovery = 86 Duplicate RPD = <200' <br /> Rich rd "r Ph . D. <br /> abcratory Director <br /> ' OUTSTANDING OUALITY AND SERVICE <br />