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were analyzed for TPHg, BTEX, Acetone, MTBE and TBA At the end of the test, the
<br /> aqueous phases were centrifuged to remove solids, then analyzed for TPHg, TPHd,
<br /> BTEX, acetone, MTBE and TBA
<br /> 2.4 Effect of Ozone and Peroxone on Inorganic Parameters (except
<br /> ]Bromate/Bromide)
<br /> To assess the effect of ozone and Peroxone on secondary water quality parameters, the
<br /> aqueous phases of the three reactors from the Hydrocarbon Removal Test (Section 2 3)
<br /> were also analyzed for metals (aluminum, antimony, arsenic, barium, beryllium,
<br /> cadmium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese,
<br /> mercury, molybdenum, potassium, selenium, silver, sodium, thallium, tungsten,
<br /> vanadium, and zinc), alkalinity, chloride, conductivity, Cr(VI), nitrate, oxidation
<br /> reduction potential (ORP), pH, sulfate, and total dissolved solids The soils from the
<br /> Hydrocarbon Removal Test were analyzed for metals and Cr(VI) The effect of ozone
<br /> and Peroxone on these parameters was determined by comparing the results to those of
<br /> the Nitrogen sparged test and to untreated IP groundwater and COMP? soil
<br /> 2.5 Effect of Ozone and Peroxone on Inorganic Parameters (Bromate/Bromide)
<br /> Treatment of water with ozone can produced disinfection by-products (DBPs) One DBP
<br /> • is bromate, which can be formed by oxidation of naturally occurring bromide Bromate
<br /> is a possible human carcinogen The test described in Section 2 3 was repeated using
<br /> COMP7 soil and V-4 groundwater to determine whether bromide (a natural component of
<br /> water) could be converted to bromate An additional reactor containing COM07 soil and
<br /> V-4 groundwater was stirred, but not sparged Past-treatment aqueous samples were sent
<br /> to Columbia Analytical Services (Kelso, WA) for analysis of bromide and bromate
<br /> 2.6 Formation and Attenuation of Cr(VI)
<br /> The results of Section 2 4 (discussed in Section 3 4) indicated that Cr(VI) could be
<br /> formed during treatment with ozone or Peroxone due to oxidation of soil-bound
<br /> chromium to water-soluble Cr(VI) Several additional tests were performed to better
<br /> understand the amount of Cr(VI) formed and its likely fate
<br /> 2.6.1 Effect of Soil-to-Liquid Ratio on Cr(VI) Formation by Ozone and Peroxone
<br /> To assess the effect of soil to liquid ratio used in bench-scale tests on the resultant
<br /> concentration of Cr(VI), six (6) tests similar to those in the Hydrocarbon Removal test
<br /> (Section 2 3) were conducted on a smaller scale using different soil to liquid ratios The
<br /> initial conditions are summarized in Table 3 The desired concentration of H202was
<br /> obtained by adding an appropriate amount of 30% H2O2 to the soil-groundwater mixture
<br /> After sparging with—1% ozone for about 6 hours at a rate of 500 mL/min, the aqueous
<br /> . phases were analyzed for Cr(VI)
<br /> PRIMA Environmental 7 Eval of Peroxone
<br /> June 1,2005 ETIC-Exxon#3942
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