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r <br /> Protect No 58100-06-18 <br /> June 21, 1995 <br /> Page 9 <br /> Vapor extraction test professional oversight and data evaluation will be performed by a <br /> California Registered Civil Engineer with experience in the performance vapor extraction <br /> pilot tests <br /> Task III - Report Preparation <br /> Prepare a final report outlining the results of the site assessment and vapor extraction testing <br /> The site assessment portion of the report will contain information as required by Contract <br /> No 53W202 to include site maps, groundwater monitoring data, soil and groundwater <br /> analytical data and discussion and conclusions relative to current versus previous site <br /> conditions Based on current soil and groundwater impacts beneath the site, a brief remedial <br /> alternatives section will also be included in the final report Feasible remedial alternatives <br /> for soil and groundwater will described along with generalized costs for each option This <br /> evaluation will also focus on whether a groundwater pump test and formal groundwater <br /> remediation are warranted <br /> The vapor extraction portion of the report will present field and analytical data, vacuum <br /> response data, estimated radius of influence, number of additional vapor extraction wells <br /> required (if any), calculated mass extraction rates, estimated remediation timeframe and a <br /> preliminary recommendation for off-gas treatment <br /> If you have any questions concerning the contents of this Workplan, or if we may be of further <br /> service, please contact either of the undersigned at your convenience <br /> Very truly yours, <br /> GEOCON ENVIRONMENTAL CONSULTANTS <br /> i"44/ /-( 040 <br /> Richard H Walls, PE Joh Juhrend, PE, CEG <br /> Sr Remediation Engineer Sr Protect Manager <br /> RHW/JEJ tic <br /> (1) Addressee <br /> Attachments Figure 1 - Vicinity Map <br /> Figure 2 - Site Plan <br /> Figure 3 - Distribution of TPHg in Groundwater - May 1994 <br /> Figure 4 - Distribution of TPHg in Soil <br /> Table I - Summary of UST and Product Line Soil Sample Analyses <br /> Table II - Summary of Soil Sample Analyses <br /> Table III - Summary of Groundwater Elevation and Analytical Data <br />