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02 June 2015 <br /> AGE Project No. 14-3154 <br /> Page 6 of 6 <br /> measurements and samples from the influent stream will be collected. <br /> COLLECTION AND ANALYSIS OF VAPOR AND GROUNDWATER SAMPLES <br /> Representative influent vapor samples will be collected from a sampling port located at <br /> the positive side of the vacuum blower (pretreatment) to evaluate the extracted matrix <br /> (soil vapor and dissolved hydrocarbons); representative effluent vapor samples will be <br /> collected from a sampling port located at the exhaust of the catalytic oxidizer (post <br /> treatment). Influent and effluent vapor samples will be collected at least once a week for <br /> the duration of the DPE. <br /> The vapor samples will be collected in Tedlar bags, placed in a dry cool container and <br /> transported under chain-of-custody to a CDPH-certified analytical laboratory. Each <br /> sample will be analyzed within 72 hours of collection for the following: <br /> • Total petroleum hydrocarbons quantified as diesel and gasoline (TPH-d/g) by <br /> EPA Method 8015 Modified and <br /> • Volatile organic compound and MTBE by EPA Method 8260. <br /> A water sample will be collected from the DPE liquid influent stream and analyzed for <br /> the suite of constituents listed above. If necessary, a water sample will be collected from <br /> the holding tank or at the conclusion of the treatment train (carbon discharge). <br /> Additionally, groundwater samples will be collected from on-site wells following <br /> remediation to evaluate the success of extraction. <br /> The opportunity to prepare this proposal is greatly appreciated. If you have any <br /> questions or comments, please contact our office at (800) 511-9300. <br /> Sincerely, <br /> Advanced GeoEnvir %AA*re <br /> aQ. vvPT"" PTT f . <br /> * No. 7473 <br /> William R. Little �F of cppEOP` <br /> Senior Project Geologist <br /> California Professional Geologist No. 7473 <br /> R&B LOUISE LLC PROPERTY <br /> c/o Mr. Dana G. Parry <br /> 1200 Concord Avenue, Suite 200 <br /> Concord, CA 94520 <br /> Advanced GcoEnvironmental,Inc. <br />