Laserfiche WebLink
QUARTERLY SUMMARY REPORT <br /> e QUARTER-2001 <br /> (April-June) <br /> Tosco(76)Service Station#6981 <br /> 4707 Pacific Ave <br /> Stockton,CA <br /> gWQCB Office Central Valley Regina Sacramento Branch <br /> COUNTY: San Joaquin <br /> BACKGROUND: The USTs were replaced in 1988. To date 16 onsite and 5 offsite borings have been drilled and 13 <br /> groundwater monitoring wells,one pumping test well, and six vapor extraction wellsinstalled. 1,600 cubic yards of soil were <br /> excavated and aerated. Groundwater monitoring began in February 1990.Vapor Ixtraction Test was performed in March <br /> 1992. A pump was test was performed in August 1992. A Vapor Extraction Sysem (VES) was installed and operation <br /> initiated in September 1994. Abandoned wells MW-3,MW-10,MW-12,and MW-'.3 to facilitate re-construction of street <br /> intersection. Submitted work plan to install one offsite groundwater monitoring weland drill one soil boring in September <br /> 1997. Submitted Work Plan Addendum (dated 2/17/99) for additional borings/wllc. Submitted additional subsurface <br /> investigation(borings/wells)report date 11/15/99. USTs and product piping removetand samples collected in April 2000 <br /> Approximately 100 cy of soil was over-excavated from the product piping dispenser aras_ Submitted UST/line removal and <br /> sampling report(dated 8/29/00). Pulsing of the VES was initiated in November 1998.VES was not pulsed in April through <br /> July 2000(UST removal and electrical service rerouted). <br /> RECENT QUARTER ACTIVITIES: Monitored and sampled groundwater monitaing wells. glower on VES failed,szstem <br /> not running. Ordered new blower after blower repair unsuccessful. Prepared and sbnlhed the quarterly summary report. <br /> NEXT QUARTER ACTIVITIES: Monitor and sample groundwater monitolk wells. Prepare and submit quarterly <br /> summary report. Review remedial options to address impacted groundwater. Reply bad blower,restart system. <br /> CHARACTERIZATION/REMEDIAL STATUS: <br /> Soil contamination delineated? <br /> Dissolved ground water delineated? y6 <br /> Free product delineated? ni <br /> Amount of groundwater contaminant recovered <br /> this quarter? 0 (gal) <br /> Soil remediation in progress? yq_ <br /> anticipated start? L <br /> anticipated completion? 94—1 <br /> Dissolved/free product remediation <br /> in progress? no <br /> anticipated start? <br /> anticipated completion? <br /> Approximately 14,794 pounds of TPHg and 183 pounds of benzene have been extracted <br /> CONSULTANT/CONTRACTOR: Gni Inc <br />