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S E C O R <br /> [Insert Addressee Name] <br /> [Insert Date] <br /> Page 2 <br /> hydrocarbons, rather than microorganisms based on the ratio of chemical oxygen demand <br /> to biological oxygen demand Low measured dissolved oxygen and the presence of <br /> ammonia and total Kjeldahl nitrogen indicates a reduced hydrologic environment The <br /> metals concentrations are very low with no exceedance of maximum contaminant levels In <br /> particular, total chromium concentration in the sample was below the analytical detection <br /> limit <br /> Based on the results of the groundwater chemistry analysts, injection of oxygen into the <br /> groundwater should not produce detrimental impacts to groundwater quality or reservoir <br /> characteristics If you have questions, please contact us at (916) 861-0400 <br /> Sincerely, <br /> SECOR International Incorpor D G O-L <br /> Daniel J D vis, R G vkv <br /> Senior Geologist -z <br /> � No g435 � <br /> JaffAuchterlonle s�4TF GF CP�`�o <br /> Senior Geologist <br /> Attachments Figure <br /> Table <br /> Attachment A Certified Laboratory Analytical Report and Chain-of-Custody <br /> Documentation <br /> • 14117-Baseline Chemistry-Itr-RWQCB doc 117-Eleven%7-11 Stores114117ICorrespondence114117-Baseline Chemistry-Itr- <br /> awQCB doc <br />