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NOV-:13-2000 10:38 FORWARD INC. 209 982 1009 P.04/06 Evaluation tivities of Stockton dies of numerous bechWcal and hydropologic-rclaftd docummits for she site that would be l for evaluating source contf0l, lun-c oonUnnient, and a0feroat, Review Of the documentation has been initi In its March 8,2 r,the RWQCB requesW installafion of additional ex traction weUS to provide control,plurne conlAnment,and aquiferevaluate Optimum for pamfial additionalextraction well% is proposed. The gmudwftr niodel will ii=rporaw hydrogeol4c and hydrogeochemicalinformation collected t to previous modeling,Including ai waw level drawdowns that: responseobserved in g frOTn eMetion wells -1and EW-Z the purnpings that have beep achievable in h exuaction well,and chmqp in VOC concentrations that have been observed. By incoqmaing 2GUW s1wspecific data and responses to the COUeWvc actiGns that have been incoFporated to dait is believedat the effectiveness o conrctive meAwres e an be confidently evaluated. Esuntial camponents of any groundwater modeling activities for the AustinRoads t are the hydraulic conductivity of ft aqUilbff m3tedal and die degree of hydraulic communication between rogeologic its. i ve ev in vi tin Road L .ow y dl will pay pmficular attentionthese item during die data reviewwill evaluation 'tion suppoft ft groundwater ' g effort. resultsThe groundwater modr-hrit vi t 1 ft need for supplementaryion(if y) rA supplementalded uontrdL plum conta3rullent, and Smundwaftw reawration corrective measures. The s will be providedto facilkAe discussionultimate 49MMM Course Of acdon tD nza ft gWs . As discussed above,the City of Stockton has provided the reqaerxd cMies of previous documeoft.and do data mview task has been inidated. The groundwater nodelingti it s me antichmaodrequire approximately four s to co Supplemental f i11VCsfig&fivC activities,ifneukd w"l be Presenled to the RWQCB bawd on the Mults cf gruundwAff modeling- It is mflcipated that a meeting will be held with the RWQCB by ft end of February 2001 to discuss e groundwater modeling reaft and any aftilml proposed site charaftrizabon acbVilm.additional . t fic data collection activitiesconsidered neccssarYfor tO ft COMPletimof the model,groundwater the RWQCB will be contwied to discuss the prcliased activities and solicit RWQCB'a input and concunCDC0. resultsBased on die input obmined during die replatory meetinX a revised EFS will revised EFS will provide .n infoarkidon to address tbe uncertainties identified including extraction well pumping rates and am of caphM aqUifern conuibution of landfill gas to groundwateranticipated vi ll be submitted withinays of the replatory rneeting, ab=rdng that no acklitional site investigative activities Table 1 piesents a schedule for each of the activities described Ehwe. his neoessary mgulatory requirearnts, activitiesl be peformed wider the direction of apPmPriatelY licensed Califomiaprofessionals.