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Appendix C
<br /> Former CURTISS PONTIAC-CADILLAC
<br /> 2450 Toste Road,Tracy, California
<br /> OZONE INJECTION BENCH SCALE STUDY
<br /> In preparation for ground water remediation utilizing ozone injection,the CVRWQCB policy for the
<br /> investigation of UST sites requires the site determine limits of the detrimental, secondary
<br /> consequences generated from in-situ ozone injection.
<br /> Based upon results from several air-sparging and ozone-injection projects with similar geologic
<br /> conditions, it has been AGE's experience that iron fouling of sparge points has not been a concern
<br /> to the site remediation. However, an Ozone Injection Bench Scale Study is proposed to determine
<br /> whether general ozone injection into the subsurface has the potential to significantly increase the
<br /> concentrations of metals which may secondarily degrade water quality.The main goal of the Bench
<br /> Scale Study is to assess production of hexavalent chromium (Cr") and to secondly measure
<br /> concentration increases of the secondary metals and general parameters,as well as the degradation
<br /> of petroleum hydrocarbons.
<br /> Baseline Analysis
<br /> For assessment of baseline conditions,two soil and two ground water samples will be collected for
<br /> anal is; one soil and ground water sampl each from the 15 and 35 foot intervals. Soil and ground
<br /> ? water samples will be ana yze y a California Department of Public Health (CDPH)-certified
<br /> laboratory for the following constituents:
<br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA
<br /> Method 8015 Modified;
<br /> • Benzene,toluene,ethyl-benzene and total xylenes(BTEX);the fuel additives methyl tertiary
<br /> butyl ether(MTBE), tertiary butyl alcohol (TBA), di-isopropyl ether (RIPE), ethyl tertiary
<br /> butyl ether (ETBE), tertiary amyl methyl ether (TAME), ethylene dibromide (EDB) and
<br /> 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260 Modified;
<br /> • Metals including antimony, arsenic, bELujrn, bb%ryllium, cadmi t , calcium, ch omi ,
<br /> c b lt,copper,ikon,lead,mere,mage_ esiu-m,me,molybdenum,nickel,potassi ��
<br /> selenium, sjLvQr, s4$ium, thallium, vanadium, and_zinc by EPA Method 200.8, and
<br /> hexavalent chromium by EPA Method 218.6/DISTLC/3060A;
<br /> • Standard mineral including chloride, flu
<br /> o ' e, nitrate as N, and sulfate by EPA Method
<br /> 300.1; alkalinity by EPA Method 310.1; and total dissolved solids by EPA Method 160.1;
<br /> • General Minerals(metals;Al Sb,As,Ba,Be,Ca,Cd,Cr,Co,Cu,Fe,Pb,Mg,Mn,Hg,Mo,
<br /> K, Ni, Ag, Na, Se, Tl, W, V, and Zn) by EPA Method 200.8 and Hexachrome by EPA
<br /> Method 218.6;
<br /> AV-C �
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