ARCHIVED REPORTS_XR0009239 - Laserfiche WebLink

Home Browse Search

i Ozone Injection Pilot Test Report TRACY MARINE SALES 2353 Toste Road, Tracy, California I1.0. INTRODUCTION At the request of Mr Joe Toste, Jr of JT Storage, Advanced GeoEnvironmental, Inc (AGE) has prepared this report for the property located at 2353 Toste Road, Tracy, California The report documents the procedures and results of 24-week ozone injection pilot test The site and the surrounding area are illustrated in Figure 1, on-site structures and well locations are illustrated on Figure 2 Site background information, including the site history, and descriptions and results of previous investigations are detailed in the AGE-prepared Remedial Acton Work Plan(RAWP)dated 20 November 2003 All field work procedures and reporting requirements are in accordance with guidelines issued by the Central Valley Region of the Water Quality Control Board (CVRWQCB) for subsurface investigation of underground storage tank (UST) system sites 2.0. PROCEDURES . The pilot test was initiated on 00 , and is currently in operation at the site However, the ozone injection system did not run continuously,AGE estimated that the system was nonoperational for approximately 10 to 12 weeks during the months of June 2004 to December 2004 due to equipment malfunction and power failures at the site AGE believes the equipment malfunctions have corrected with the installation of a ozone compatible air compressor (the third compressor to be installed at the site)to handle the load and allows for direct ozone injection The ozone infection system has not shut down due to equipment malfunction since December 2004 Due to the loss of operational time during the 24-week pilot test, AGE will use data collected from the site between 12 June 2004 and 09 March 2005 to evaluate the effectiveness of the ozone infection system to ' remediate dissolved petroleum hydrocarbon concentrations in the ground water at the site ' 21 24-WEEK OZONE INJECTION PILOT TEST ' The pilot test was conducted using a HC-2 5 Ozone Generator,which could produce ozone at a rate of up to 2 5 pounds per day at a maximum pressure of 25 pounds per square inch (psi) The generated ozone was piped into nine infection wells (OW-I through OW-9) at a pressure of ' approximately 8 to 10 psi,and then injected into the impacted zone via a microsparge point in each well that was set at either between 17 5 and 20 0 feet below surface grade (OS-1, OS-2 and OS-5 through OS-10) or between 41 5 and 44 feet below surface grade (OS-3 and OS-4) The ozone was ' supplied to each infection well for a duration of two hours and the system allowed for a two-hour . hiatus cycle ' Advanced GeoEnvironmental,Inc I