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1 H KLEINFELDER & ASSOCIATES <br /> A soil sample was collected from the soil pile with the highest PID <br /> • readings (SP-59, 460 ppmv and SP-60, 430 ppmv) . Soil sample 5-03 was <br /> collected in the vicinity of SP-59 and submitted under chain of custody to <br /> California Analytical Laboratories/Enseco in West Sacramento. The sample <br /> was analyzed for volatile aromatics (benzene, toluene, xylene) by EPA 8020 <br /> and total petroleum hydrocarbons by GC-FID. The results are as follows: <br /> Sample ID TPH Benzene Toluene Xylene <br /> 5-03 830 mg/Kg ND 380 ug/Kg 10,800 ug/Ig <br /> The locations of the soil piles, PID sample points, and soil samples <br /> submitted for chemical analyses are shown on Plate 1. <br /> Soil sample S-03 was collected from the soil pile with the highest PID <br /> readings in an attempt to analyze the area of the soil piles with the <br /> highest concentrations of petroleum hydrocarbons. The disposition of the <br /> covered soil piles will be based on the "worst case scenario" as <br /> determined from soil sample 5-03. The San Joaquin County Air Pollution <br /> Control District "Contaminated Soil Aeration" document dated October 16, <br /> 1986 specifies contaminated soil with an organic content of 500-1,000 ppm <br /> (mg/Kg) can be aerated at a rate of 60 cubic yards per day (reference <br /> attached) . <br /> J.H. Kleinfelder & Associates recommends that the stored soil be aerated <br /> in accordance with the specified guidelines. The San Joaquin Local Health <br /> District and San Joaquin County Air Pollution Control District should be <br /> notified prior to implementing an aeration program. Please be advised <br /> that we can assist you with any construction management services you may <br /> require to initiate this program. <br /> If you have any questions or need additional information, please do not <br /> hesitate to contact us. Thank you. <br /> Sincerely, <br /> J.H. KLEINF LDER & ASSOCIATES <br /> 6,-e U <br /> Eric S. Fin <br /> dla <br /> Staff G ologist <br /> Kent E. Zenobia, P.E. <br /> Senior Project Manager <br /> Environmental Services Division <br /> Central Valley Group <br /> ESF:KEZ:cc <br /> Attachments <br /> cc: Bryce Ruschhaupt <br /> Laurie Cotulla <br /> Seyed Sadredxn <br /> 41-87-140 <br />