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Leaking t1aderground Fuel Storage Tan, "rogram <br /> Michelotti's Auto/Sanchez Property <br /> 1876 Country Club Blvd., Stockton <br /> III Release and Site Characterization Information continued January 5, 2012 <br /> Maximum Documented Contaminant Concentrations - Before and After Cleanup <br /> Contaminant Soil (ppm) Water (ppm) Contaminant Soil (ppm) Water (ppm) <br /> Before After Before After Before After Before After <br /> TPH (Gas) 14,000. * 140. 2.6 Ethyl-benzene 340. 2.5 0.0053 <br /> Benzene 300. * 14. 0.0023 Xylene 3400. * 14. 0.048 <br /> Toluene 1100. * 27. 0.0008 MTBE 0.01 .0079 0.49 0.002 <br /> Comments. TPHg soil 'before' samples from soil probe SP-E, Feb 1997. BTEX soil before from UST <br /> removal Jan 1989. * Soil after: No sample actually taken, but (highest) impacted soil at SP-E-96', Feb <br /> 1997 was removed in over-excavation Feb 2003 to 28'bgs, where SP-E-26'was ND in Feb 1997. MtBE <br /> soil 'before' from TH-1-40.5', March 1998. MtBE soil 'after' data from MW1-36-36.5' Jan 2003. Water <br /> `before' from PZ1A, Jan 2003. TPHg and BTEX water 'after' from MW-6A and MW-10, May 2011. <br /> MtBE water 'before' from MW-1, Dec 1997. MtBE water 'after' from MW-8B, May 2011. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per Regional Board Basin Plan? Yes <br /> Does completed corrective action protect potential beneficial use per Regional Board Basin Pian? Yes <br /> Does corrective action protect public health for current land use? Yes <br /> Site management requirements: none <br /> Should corrective action be reviewed if land use changes? Yes <br /> Have any of the MonitoringNapor wells been decommissioned? Yes. <br /> Number Decommissioned: 7 (MW-1, R1A&B, PZ-1A&B, PZ-2A&B). <br /> Number retained: 18 13 MWs + 5 soil vapor) <br /> List enforcement actions taken: NOR, May 21, 1993 <br /> List enforcement actions rescinded: nla <br /> V. Local Agency Representative Data <br /> Name: Adrienne Ellsaesser, REHS Title. Acting LOP Program Coordinator <br /> Signature: Date: 115112- <br /> V1. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: Response Date: <br /> RB Staff: James L.L. Barton Response: <br /> Title: Engineering Geologist <br /> VII. Additional Comments, Data, etc. <br /> Remediation: 1-GW pump and onsite treat with discharge to City sewer 2003 to 2010. <br /> 2- Soil excavation and offsite disposal 2003 <br /> This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part <br /> of the official site file. <br />