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E-Flux,LLC Project:Tracy,CA 3rd Round of Samples(R3) Report Date: Customer:ARCADIS 12/19/13 Customer Contact: Scott Hackman Basis for Analysis: This report is based on E-Flux proprietary technology and equipment to measure soil gas efflux. Chemical analysis is based on methods ASTM 4373-02(Rapid Determination for Carbonate Content in Soils). and ASTM D6686-12(Determining the Biobased Content in Solids,Liquids and Gases Using Radiocarbon Analysis). This report contains Confidential Information and is to be delivered only to the Customer indicated above. Sample Deployment Dates Raw Results(not blank corrected) Blank Corrected Results 14C Anal is fossil all etquivalent LNAPL C,as Std.Dev. fossil fuel f.f.NAPL Carbon Content CO2 Flux loss reported Modem f.f.C% g f.f.CO2 flux loss rate Moisture dry sorbent Number of avg% CV% microM/ gallons/ mlcroM gallons deployed retrieved days % mass, g Replicates CO2 CO2 %CO2 g CO2 MA2.sec acre yr %Mod % %ff g Cot ff /m"2.sec /acre.yr ARCTRA-R3-CO2-TB NA NA NA 17% 42.543 2 1.21% 0.000/,t_0.00% NA NA 72.1% 0.47% 37.3%. - NA NA ARCTRA-R3-CO2-01 11/4/1312:05 11/19/1313:00 15.04 9% 45.538 2 6.43% 1.59%1 5.22% 2.38 5.13 3,219 39.9% 0.16% 65.3%1 1.71 3.68 2,312 ARCTRA-R3-CO2-02 11/4/1312:20 11/19/1313:05 15.03 12% 45.046 2 9.70% 4.99% 8.49% 3.82 8.25 5,180 ;2!5 9. 2!50Z11657.4% 2.30 4.97 3,122 ARCTRA-R3-CO2-03 11/4/1312:35 11/19/1313:10 15.02 10% 42.352 2 1.94% 0.00% 0.73% 0.31 0.67 418 71.5% 37.8% 0.12 0.26 162 ARCTRA-R3-CO2-04 11/4/1312:55 11/19/1313:25 15.02 15%1 44.417 2 5.02% 1.48% 3.81% 1.69 3.6,51 2,2941 76.0%j 0.23% 319%1 0.55 1 1.20 1 752 Assumptions and General Notes: Results are travel blank corrected but not background location corrected. If trap carbon content is not larger than travel blank,results are reported as ND. Carbon analysis was conducted in duplicate. C.V.is coefficient of variation,equal to the ratio of the standard deviation over the average. The flux equivalence is 1 microMole/(mA2.S)equals 627 gallons/(acre.yr). This assumes a hydrocarbon density of 0.75 g/mL and a formula of C81-11 8. Trap cros ssectional area is 8.11 a-03 mA2 NA:Not Applicable Quality Assurance/Quality Control Notes: Travel blank(TB)concentration was 1.2%. Typical travel blank concentrations are<2%. Trap lops were not saturated. Max.measured top concentration was 8.2%(top of traps ARCTRA-R3-CO2-02). Sorbent saturation is 30%. For any comments or questions,please contact: Julio Zimbron,Ph.D. E-Flux,LLC 3185-A Rampart Road,Room 250D Fort Collins,CO 80521 o:(970)491.0626 c:(970)219-2401 jzimbron@soilgasflux.com