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f i � <br /> 1 <br /> Method 602 will be utilized for BTEX with a detection limit of <br /> 0.5ug/l as required by the SJCEHD. <br /> 13) Measure depth to groundwater, survey the wells and calculate <br /> a gradient. <br /> 14) A report, signed by the Certified Engineering Geologist, <br /> will include a summary of the field work, boring logs, COC <br /> documentation, certified analytical results, conclusions and <br /> recommendations, in accordance with the "Tri-Regional Board Staff <br /> Recommendations for Preliminary Evaluation and Investigation of <br /> Underground Storage Tank Sites". The report will be submitted <br /> to the client and the SJCEHD. <br /> If you have questions, please call us at 510-505-0722, <br /> Sincerely, <br /> o P. Cummings, REP, CHMS John N. Alt, CEG <br /> P ncipal Epigene International <br /> cc: PIEDMONT LUMBER �ERED GF <br /> Christopher W. Wood, Esq. <br /> Enclosures <br /> � JOHN N. ALT <br /> N° 1136 <br /> Y? CERTIFIED <br /> ENGINEERING <br /> GEOLOGIST <br /> �P <br /> ATF �F CAl.1F�0.\ <br /> 3 <br />