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` Burick �fto `./ <br /> Addendum II B.C&D.Properties <br /> Project No. 01-8.1 <br /> April 13,1M <br /> Page 3 <br /> The groundwater samples will be analyzed for BTEX and TPH-Gasoline by EPA <br /> method 602 and 8015M/LUFT respectively at GeoAnalytical Laboratories in Modesto. <br /> The detection limit for the EPA 602 (BTEX) analysis ranges from 0.3 to 0.6 gg/l in <br /> water and the detection limit for the TPH-Gasoline analysis is 0.5 mg/1. <br /> Recommendations <br /> In light of the site's low levels of contamination and it's natural ability for <br /> hydrocarbon attenuation by the microbial breakdown conditions present in the <br /> shallow groundwater, Geological Technics Inc. recommends that water quality <br /> analyses be augmented by monitoring the dissolved oxygen and csitbon dioxide <br /> content of the groundwater. Biological degradation of hydrocarbons in the <br /> groundwater would be marked by increased levels of carbon dioxide in comparison <br /> to background levels (non contaminated up gradient well, MW-3). <br /> Respectfully submitted, <br /> �Essio, <br /> GEOLOGICAL TECHNICS INC <br /> 41p,NOyy UC�Or <br /> Raynold I. Kablanow H, Ph.D. ' <br /> W ` <br /> Registered California Geologist#5234 * NO.52U <br /> Registered Environmental Assessor #901 s `P <br /> enclosures r9lF OF CA��s��? <br /> X Linda Turkatte, San Joaquin County <br /> Elizabeth Thayer, CRWQCBCVR <br /> 1 <br />