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The analytes measured, the procedures used, and the laboratory that performed these analyses are summarized in Table 2 All of the laboratories, except PRIMA Environmental, are California Department of Health Services certified Table 2. Summary of Analyses. Analyte Method Laboratory Performing Analysis* Alkalinity 3101 Alpha Analytical Bromide and Bromate EPA 300 1 Columbia Analytical Services Chloride EPA 300 Alpha Anal ical Chromium, Hexavalent Hach or 7199 PRIMA or Excelchem Metals" EPA 6020 Alpha Analytical Nitrate EPA 300 Alpha Analytical ORP Probe PRIMA H Probe PRIMA Sulfate EPA 300 Alpha Analytical * Alpha Analytical(Sparks,NV),Columbia Analytical Service(Kelso,WA),Excelchem(Roseville, California) **Metals =A], Sb,As,Ba,Be,Cd,Ca,Cr,Co,Cu,Fe,Pb,Mg,Mn,Hg,Ni,K,Se,Ag,Na,Tl,W,V,Zn 2.2 Ozone Demand Although Peroxone is a combination of ozone and peroxide, the ozone demand of soil and groundwater was measured as a first approximation of the amount of ozone that would be required in situ The ozone demand was estimated using a method based on the "Ozone Demand" test described in Standard Methods for the Examination of Water and Wastewater, 19`h Ed Ozone was measured using a modified version of method SM 4500-03B, which is based on the decolorization of indigo dye by ozone The ozone demand of the soil was estimated by addling a 2 5 g of field moist COMP-7 soil to 1L of ozone-saturated water, then measuring the concentration of ozone over time A control in which no soil was added was also performed The soil ozone demand (SODoz)was taken to be the difference in ozone consumption in the presence and absence of site material It was calculated according to the Equation 5 The specific time point(s) used in the calculation are discussed in Section 3 0 SODO,= {[03 Consumed]so,l — [03 Consumed]control) x VIM Eqn 5 where SOD = soil oxidant demand in mg 03 consumed/g soil [03 Consumed],o,itrol =change in 03 concentration in the absence of soil in mg/L PRIMA Environmental 5 Eval of Peroxone June 1,2005 ETIC-Exxon##3942