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k'q KLEINFELDER P screened interval depth, it is Kleinfelder's opinion that the effects of leakage from the canal � P would not significantly affect the groundwater level in this well and would likely be negligible if it did. However, future groundwater soundings and resulting flow and gradients should be assessed for any suspected anomalies, which may be caused by leakage from the Delta Mendota Canal. Mr. Borges from the PHS/EHD has additionally requested that the deep wells be monitored for general minerals on an Annual basis. In addition to the PHS/EHD request, the San Joaquin County Community Development Department of Development Services Division (CDD) has requested that three shallow wells be installed to monitor potential perched water and/or seepage between the Delta Mendota Canal and a proposed settling basin and in the vicinity of the California Aqueduct near the southwest corner of the subject site. Quarterly groundwater-level monitoring of these three wells and annual reporting has been requested. The following scope of service address these items. PROPOSED SERVICES Task E01 -Permitting and Pre-Field Activities Based on the verbal approval of the client, this scope of work(less the cost estimate and contract) will be submitted to the San Joaquin County Public Health Services Department Environmental Health Division (PHS/EHD) and CDD for approval. Kleinfelder will obtain boring/monitoring well permits from the PHS/EHD. The PHS/EHD must approve the proposed scope of work and ' the boring permits prior to any exploratory borings greater than 18 inches in depth. Additionally, PHS/EHD will charge DSS an initial 3-hour minimum and any additional oversight charges above the permit fees to be submitted by Kleinfelder. These fees will be billed directly to DSS by the PHS/EHD. Kleinfelder will forward the appropriate "billing and compliance acknowledgement forms" to DSS for signature. Signed originals of the forms and the initial 3- hour oversight fees must be submitted to PHS/EHD as part of the permit process. The drilling subcontractor will be responsible to contact Underground Service Alert 48 hours prior to conducting fieldwork to notify local utilities of our proposed subsurface assessment. Task E02—Monitoring Well Installation Three (3) monitoring wells will be installed at the DSS Company Tracy facility located west of Koster Road, between the California Aqueduct and the Delta Mendota Canal, in Tracy, California (Plate 1). Two wells will be installed between the Delta Mendota Canal and the settling basin located near the eastern boundary of the site in the vicinity of a proposed gravel pit. The third well -Will be installed near the southwestern Rortion of the site just northeast of the California _Aoue uct. Based upon approximate elevations of the Delta Mendota Canal and California Aqueduct invert reported by DSS, the three shallow monitoring wells will be installed to total depths of approximately 35 feet below ground surface (bgs). The purpose of these 20-YPO-212R/2000P29112000W027 Page 2 of 7 CD 2000 Kleinfelder,Inc. August 16,2000