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Second Quarter 2000 Progress Report Former Chevron 49-5775, (CAO #5-00-704) 301 West Kettleman Lane Lodi, CA • QUARTERLY RESULTS SUMMARY: Current Phase of Project Frequency of Groundwater Sampling Frequency of Groundwater Monitoring Is Free Product (FP) Present On -Site Current Remediation Techniques Approximate Depth to Shallow Groundwater Groundwater Gradient DISCUSSION: Remediation Quarterly Quarterly No GWE/ SVE 53 30' to 54 37' Southwest @ 0 003 ft/ft July 14, 2000 On April 12, 2000, Gettler-Ryan Inc (GR) advanced ten (10) GeoProbe borings to collect composite samples to be used to profile soil generated during excavation at the site On May 8 and 9, 2000, approximately 900 cubic yards (yds') of excavated soil were removed to a landfill in Livermore, CA Between April 6 and June 5, 2000, GR extracted groundwater from well EX -1 for approximately 8 -hours per day on a weekly basis Approximately 2,635 gallons of water were removed during this period Analytical results are presented in Attachment B This groundwater monitoring and sampling event was performed by GR on May 25, 2000 TPHg was reported in four (4) of the ten (10) Chevron wells sampled this quarter at concentrations ranging from 162 (MW -6) to 1,390 ug/l (MW -3) Benzene was reported in six (6) wells sampled this quarter at concentrations ranging from 4 61 (MW -l) to 19,000 ugll (EX -1) MtBE was reported in seven (7) wells at concentrations ranging from 8 28 (MW -3) to 350,000 ug/l (EX -1) The concentration of TPHg in MW -5 increased from below analytical detection limits to 1,140 ug/l this quarter Concentrations of MtBE in MW -5 increased from 474 ugll from the previously reported level of 83 ugll The concentrations of MtBE in EX -1, MW -6, MW -8, and MW -9 decreased this quarter to 350,000 ug/l, 378 ug/l, below detection limits, and 53 4 ug/l respectively Groundwater elevations across the site increased an average of approximately 0 4 feet this quarter Groundwater flow direction was to the southwest Historical groundwater flow has varied from southeasterly to southwesterly The installation of the groundwater and soil vapor extraction and treatment system began on June 5, 2000 The system became operational on July 3, 2000 Groundwater monitoring wells MW -513, MW -813, MW -10B, MW -12A, MW -12B, MW -13, and MW -14 were installed during June and July 2000 Data collected during this assessment will be reported as part of the Problem Assessment Report (PAR) CJ