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Metals and Cr(VI) were measured in soil post-treatment at the request of ETIC Cr(VI)
<br /> was not observed above the detection limit of 1 µg/kg in any case The concentrations of
<br /> metals were similar in the post-treatment Nitrogen, Ozone and Peroxone tests, implying
<br /> that oxidation had little effect on the overall composition of the soils However, the
<br /> metals concentrations were somewhat lower in post-treatment soils than in untreated
<br /> COMP7 soil, but this was probably due to differences in percent moisture of the soils
<br /> The one notable exception is manganese The concentration of manganese in untreated
<br /> soil (1,900,000 µg/kg) was about twice the concentration in post-treatment soils (720,000
<br /> to 830,000 µg/kg) This suggests a heterogeneous distribution of manganese within the
<br /> soil since it could not be accounted for in the aqueous phase Variation in manganese
<br /> distribution could help explain the erratic formation of Cr(VI) (See Section 3 4 for
<br /> further discussion)
<br /> Table 8. Hydrocarbon Removal Test. Inorganic Parameters.
<br /> Aqueous Concentrations Soil Concentrations
<br /> Untreated Nitrogen Ozone Peroxone Untreated Nitrogen Ozone Peroxone
<br /> Analyte Units GW Sparge S ar a Soil Sparge S ar a
<br /> Aluminum ppb 56 160 160 54 30,000,000 18 000 000 21,000,000 26 000 000
<br /> Antimony b <5 <5 <5 <5 1,400 <1,000 <1 000 < 1,000
<br /> Arsenic ppb 120 80 75 80 8 300 7,100 7 500 8,400
<br /> Banum ppb 420 470 880 880 260 000 190 000 190,DOD 220,000
<br /> Beryllium ppb
<br /> c 4 <4 <4 <4 <1000 <1 000 <1,000 < 1 000
<br /> Cadmium ppb <0 5 <0 5 <05 <0 5 <1000 1 <1 000 <1,000 < 1 000
<br /> Calcium ppb 110,000 44,000 91 000 90 000 15,000,000 9,500 000 10,000,000 11 000 000
<br /> Chromium ppb <5 <5 10 <5 64 000 50,000 53 000 64 000
<br /> Cobalt ppb <5 <5 <5 <5 16,000 14 000 14,000 16 000
<br /> Copper ppb I <10 <16 10 <10 51,000 51 000 47,000 51 000
<br /> Iron PPb 1 510 310 510 470 31 000 000 26 000,000 27 000 000 30 000,000
<br /> Lead ppb <2 <2 <2 <2 7 800 6,600 6 800 7,700
<br /> Magnesium ppb 54,000 28 000 45 000 44,000 9 500 000 7800000 7 800 000 8,900,000
<br /> Manganese ppb 2 500 230 < 10 510 1,900,000 1 720 000 750,000 830 000
<br /> Mercury b <1 < 1 <1 <1 <200 <200 <200 <200
<br /> Molybdenum ppb 12 20 21 24 <1 000 <1,000 <1 000 < 1,000
<br /> Nickel ppb 11 <5 <5 <5 54 000 n m n m n m
<br /> Potassium ppb 5 600 3,600 4 600 4 400 2,800,00D 1 900 000 2 000 000 2400,000
<br /> Selenium ppb I <5 <5 <5 <5 <10DO <1 000 <1 000 < 1,000
<br /> Silver ppb <5 <5 <5 <5 <1000 <1 000 <1 000 < 1 000
<br /> Sodium ppb 58,000 51 000 54 000 53,000 280 000 1 210 000 230,000 280 000
<br /> Thallium ppb <2 <2 3 <2 <1000 <1,000 < 1,000 < 1 000
<br /> Tungsten b <5 <5 <5 <5 <1000 <1,000 < 1 000 < 1,000
<br /> Vanadium ppb <5 81 61 350 75 000 58,000 63 000 64 000
<br /> Zinc ppb < 100 <100 < 100 <100 85 000 66 ODO 67,000 78 000
<br /> mg/L
<br /> Alkalinty CaCO3 450 210 360 320 n m n m n m n m
<br /> Bromate µg/L I <8 <8 <8 <8 n m n m n m n m
<br /> Bromide µ L 159 161 <20 454 n m n m n m n m
<br /> Chloride m L 78 76 78 76 n m n m n m n m
<br /> Conduct vay MS 1 02 0 643 0 913 0 925 n m n m n m n m
<br /> Cr(VI) ppb <10 <10 51 31 < 1 <1 < 1 <1
<br /> Nitrate mg/L-N <0 25 <0 25 200 770 n m n m n m n m
<br /> ORP mV 145 153 156 166 n m n m n m n m
<br /> pH - 823 1 853 818 841 nm nm nm nm
<br /> Sulfate m /L 9 11 11 11 n m n m nm nm
<br /> TDS I mg/L 1 630 400 1 570 1 580 n m n m n m n m
<br /> n m = not measured
<br /> ppb=µg/L for aqueous phases andµg/kg for soil
<br /> PRIMA Environmental 16 Eva] of Peroxone
<br /> June 1,2005 ETIC-Exxon#3942
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