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variability. <br /> • JPCA proposes continued quarterly sampling and gradient data <br /> measurements. <br /> This site is a likely candidate for the newly suggested Risk Based <br /> Corrective Action RBCA being developed by the California State <br /> Water Control Board for the following reasons. <br /> 1. The contaminated water appears to be in the shallow aquifer and <br /> not used for human consumption. <br /> 2 . There are no functional domestic water wells within �i mile of <br /> the subject property. <br /> 3 . Natural biodegradation should remediate the contaminant plume <br /> in the shallow aquifer in a few years. <br /> 4 There appears to be no or extremely low risk to public health. <br /> This report has been prepared specifically for Ernest Costamagna <br /> with specific application to a hazardous waste investigation. The <br /> report has been prepared with the care and skill generally <br /> exercised by reputable professionals, under similar circumstances, <br /> in this or similar localities. No other warranty, either expressed <br /> or implied, is made as to the professional advice presented. <br /> • A copy of this quarterly report is being mailed to Michael Infurna, <br /> Sr. REHS, SJCEHD. <br /> If you have any questions, please call us. <br /> Sincerely, <br /> )Jhn P. Cummings, REA, REP, CHMS John N. Alt, CEG <br /> nczpal Epigene international <br /> cc : SJCEHD ��tED GEpeoc, <br /> J09N N ALT <br /> K-O 1136 <br /> CERTIFIED .k <br /> ENGINEERING <br /> s GEGLOGv ST `P <br /> TqT� Olr C AILI <br />