ARCHIVED REPORTS XR0003442 - Laserfiche WebLink

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Ms Marla D Guensier Exxon Company, U S A August 20, 1997 Page 6 dissolved oxygen content of the ground water which in turn would enhance natural biological attenuation It is proposed that this system be installed behind the station building m an approximate four by four foot area in the vicinity of the existing system piping manifold Figures 7 and 8 show the proposed remediation system layout and present a process flow diagram of the system, respectively If accepted, further details of the proposed bioventing/air sparging system will be presented in a design package System Monitoriniz In an effort to monitor vapor migration and system performance, hydrocarbon, carbon dioxide, and oxygen levels would be measured with field instruments from select monitoring wells on a monthly basis Based upon the monitoring data, additional remedial activities may be considered at a Iater date Permitting It is anticipated that a permit to operate the bioventmg system will be required by the San Joaquin Valley Unified Air Pollution Control District This permit will be obtained once approval has been granted by the regulatory agencies for the proposed interim system . Remarks/Signatures The interpretations contained in this report represent our professional opinions, and are based in part, on information supplied by the client These opinions are based on currently available information and are arrived at in accordance with currently accepted hydrogeological and engineering practices at this time and location Other than this, no warranty is implied or intended Delta recommends that a copy of this report be forwarded to Mr Mike Infurna Ms Elizabeth Thayer Environmental Health Division California Regional Water Quality Control Board, Public Health Services Central Valley Region San Joaquin County 3442 Routier Road Post Office Box 2009 Sacramento, California 95827-3098 Stockton, California 95201