SITE HISTORY_CASE 1 - Laserfiche WebLink

Home Browse Search

' Page 2 Case Closure Summary Leaking Underground Fuel Storage Tank Program Ill. Release and Site Characterization Information continued Maximum Documented Contaminant Concentrations-- Before and After Cleanup Contaminant Soil Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) After Before After After Before After TPH(Gas) 2100 NA 1600 10 Xylene 190 NA 150 1.2 TPH (Diesel) 17 NA NA NA Ethylbenzene: 31 NA 29 0.31 1.2 TP Motor Oil 740 NA NA NA Benzene 12 NA 19 ( } NA 50 1.6 Heavy Metals Pb=13 NA Pb=1.2 NA Toluene 8$ <0.05 MTBE 0.01 NA <0.5 r f Comments: The Soil Before Concentrations:TPH-g, E, T, X are from boring sample 63-2 at 16' collected 81711998; B is from boring 133-17 at 20' collected 412012007;TPH-d is from UST removal sample 2-S at approx, 12' collected 211611988; TPH-motor oil is from UST removal sample 1-N at 12' collected 211611988; lead (Pb) is from sample boring B3-17 at 10' collected 4120!2007;. and MTBE is from boring sample MW3-3 at 25' collected 5/18/1998. No Soil After data collected. The Ground Water Before Concentrations: TPH-g, E, X are from a grab sample 133-1 at 22' collected 811311998; B is from a grab sample 63-5 at 20' collected 1212012001; T is from 133-15-20 at B3-15 at 20' collected 412 012 0 0 7; Lead (Pb) is from a grab sample B3 28-45 collected at 45' on 312312010; and'MTBE is from a grab sample B3-15- 20 collected at 20'4/20/2007. Ground Water After Concentrations: TPH-g, T, and X are from MW3-3 collected on 10/1212011; and B, E, and MTBE are from MW3-8 collected on 10/12/2011. NA above= not analyzed. IV. Closure Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?Yes Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan?Yes i Does corrective action protect public health for current land use?Yes Site management requirements: None Should corrective action be reviewed if land use changes?Yes Monitoring/Remediation Wells Decommissioned? No Number Decommissioned: 0 Number retained:13 J. List enforcement actions taken: NOR sent to RP on January 26, 1998 i` List enforcement actions rescinded: None V. 'Local Agency Representative Data Name: Adrienne Ellsaesser, RENS Title: Acting Program Coordinator Signature: �� Date: ' VI.'Central Valley Regional Water Quality Control Board RB Notification Date Submitted to RB: Response Date: RB Staff: J. Barton Response: Title: Eng. Geologist VII;Additional Comments, Data, etc. This document and the related CASE CLOSURE LETTER shall be retained by the lead agency as part of the official site file.