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Sent By: RWCCB; • 2553439; May -24 6:59; Page 6 <br />FROM CVC 8 abc PHONE NO. : 209 983 9536 May. 16 2001 12:31PM P5 <br />The Laboratory Data sheets with COG 40cumentation and detection <br />limits are contained', in Appendix A. <br />SUMMARY, CONCLUSIONS and RECOMMENDATIONS <br />The analytical results reported no detectable concentrations df <br />TPHD, TPHG, BTEx or Oxygenates in the domestic well water in the <br />samples collected. <br />The soil sample collected below the former AST dispenser area <br />indicated no detectable TPHG, BTEX or oxygenates. The TPHG <br />concentration was a do minimis 14 PPM. <br />The area beneath the former UST has contaminated soil in a sandy <br />lens approximately 15 feet and is approximately 2 and 112 feet <br />thick. <br />The first aquifer has some fuel products in it as noted in Table <br />1. <br />JPCA strongly suggests that the overburden in the former UST area <br />be removed commencing at Vrade to approximately i5 feet. Then <br />the lens o£ sandy sail which is contaminated with fuel product be <br />removed and spread out to aerate under a permit form the local <br />Air Quality District. The extent of the excavation should be <br />monitored with a PID or similar instrument. <br />Because the potable water well was not found to be contaminated, <br />no other remediation actions are recommended at this time. <br />This report has been prepared specifically for Phillip Vallejo, <br />with specific application to a Phase i environmental <br />investigation. This report has been prepared with the care and <br />skill generally exercised by reputable professionals, under <br />similar circumstances, in this or similar localities. No other <br />warranty, either expressed or implied, is made as to the <br />professional advice presented. <br />JPCA appreciates this opportunity to Complete this environmental <br />investigation for you and would appreciate your referring further <br />work to JPCA, It you have any questions, please contact me. <br />Sincerely <br />9/ <br />15r,11 - <br />SnP- Cummings, RBA, OHMS <br />Vironmental Enginc§er <br />incipal <br />DIIN N. ALT <br />N? "36 <br />John N. Alt, CEG {= CERT( FIE <br />Epigene Internation 1 FRMNCESING <br />sj GEDLGGiST <br />OF c <br />4 qrF nu�� <br />