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' ' <br /> E_ <br /> PEA' <br /> G�`braD <br /> P E C �/f �r�1 <br /> Quarterly Site Status Report MAY 2 2 1992 <br /> Beacon Station 696 - Lodi , California <br /> Page 2 ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICE:S <br /> MW-24 and MW-25 were found to contain measurable water during <br /> this quarter. <br /> RESULT OF QUARTERLY MONITORING: <br /> Ground-water samples from MW-34 (southern boundary of the <br /> property) , MW-20 and MW-25 (southeastern portion of the <br /> property) all exhibited non-detectable amounts of benzene. <br /> MW-24 (center of the property) , MW-35 (west boundary of the <br /> property, and MW-36 (eastern boundary of the property all <br /> exhibited single digit parts-per-billion benzene. These data <br /> suggest that hydrocarbon previously detected in ground-water <br /> samples from monitoring wells at the site have been <br /> volatilized and destroyed in the vapor extraction system. <br /> Ground-water potentiometric surface elevation data indicates <br /> that ground-water flow is being influenced by the vapor <br /> extraction equipment <br /> PROPOSED ACTIVITY OR WORK FOR NEXT QUARTER: <br /> ACTIVITY ESTIMATED COMPLETION DATE <br /> Perform Second Quarter ground-water <br /> monitoring event June 1992 <br /> Remove catalytic unit and apply for permit <br /> to install carbon venting unit May 1992 <br />