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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA <br /> 77 95037 <br /> -9600 <br /> Analytical (408)782-9600 <br /> FAX equoi lab 6309 <br /> corn' www sequotalabs corn <br />' ETIC Engineering Inc-Pleasant Hill(Exxon) Project Exxon 7-3942 MOJ0913 <br /> 2285 Morello Avenue Project Number Exxon 7-3942 Reported <br /> Pleasant Hill CA,94523 Project Manager Ted Morse 11/09/05 15 08 <br />' Conventional Chemistry Parameters by APHA/EPA Methods - Quality Control <br /> Sequoia Analytical- Morgan Hill <br />' Evaluation Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />' Batch 5J19010-General Pre <br /> Blank(5JI9010-BLKI) Prepared 10/19/05 Analyzed 10/20/05 <br /> Total Dissolved Solids ND 5 mg/l <br /> LCS(5J19010-BSI) Prepared 10/19/05 Analyzed 10/20/05 <br /> Total Dissolved Solids 480 10 mg/l 500 96 80-120 <br /> Matrix Spike(5JI9010-MS1) Source MOJ0678-01 Prepared 10/19/05 Analyzed 10/20/05 <br /> Total Dissolved Solids 855 20 mg/1 500 380 95 80-120 <br /> Matrix Spike Dup(5J19010-MSD1) Source MOJ0678-01 Prepared 10/19/05 Analyzed 10/20/05 <br /> Total Dissolved Solids 820 20 mg/1 500 380 88 80-120 4 20 <br /> Batch 5J19029-General Prep <br /> Abak(5J19029-BLKI) Prepared&Analyzed 10/19/05 <br /> onate Alkalinity ND 25 mgll <br /> Carbonate Alkalinity ND 25 <br /> Hydroxide Alkalinity ND 25 <br /> Total Alkaltmty ND 25 <br /> LCS(5J19029-BSI) Prepared&Analyzed 10/19/05 <br /> Total Alkalinity 104 50 mg/1 100 104 85-110 <br /> Matrix Spike(5J19029-MSI) Source MOJ0396-01 Prepared&Analyzed 10/19/05 <br /> Total Alkalinity 115 50 mg/I 100 13 102 85-110 <br /> Matrix Spike Dup(5J19029-MSD1) Source MOJ0396-01 Prepared&Analyzed 10/19/05 <br /> Total Alkalinity 117 50 mg/1 100 13 104 85-110 2 10 <br /> oia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis This <br /> analytical report must be reproduced in its entirety <br /> Page 77 of 80 <br />