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f T WR-13-1992 14:32 FROM '-r-OLOG I CAL TECt N I CS TO 14087224159 P.04 <br /> Burick <br /> Addendum lI B.C.&D. Properties <br /> Project No. 01-8.1 <br /> April 13,1992 <br /> Pap 3 tiPr20 6 <br /> �'N VI 01i`bavIEk1""L 1-1,E g LTH <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 pg/l in <br /> water and the detection limit for the TPH-Gasoline analysis is 0.5 mg/l. <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 carbon 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, �QR A <br /> ItzU <br /> oc �+ <br /> GEOLOGICAL TECHtvICS INC NO.52U <br /> s <br /> Raynold L Kablanow Il, Ph.D. r�rFo�r CA1.tFp���P <br /> Registered California Geologist#5234 <br /> Registered Environmental Assessor. #901 <br /> enclosures <br /> cc Linda Tuarkatte, San Joaquin County <br /> Elizabeth Thayer, CRWQCBCVR <br /> TOTAL P.04 <br />