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,�Claytori �.`m • Document completed work in a technical report. 5.0 MONITORING WELL INSTALLATION WORKPLAN Figure 7 presents proposed monitoring well locations, based on the analytical results from the most recent quarterly sampling event. Five new monitoring wells are proposed to provide complete delineation of the extent of petroleum hydrocarbons in the groundwater as well as provide information on groundwater quality near areas identified during this investigation. Well 3MW-1 (partially filled with sand) will be abandoned and replaced with a well as close as practical to the location of the previous well. The second well will be placed between location of missing well MW-1 and Weber Avenue to evaluate concentrations along the northern boundary of Parcel 2A, an area where the Goresorber survey indicated increased benzene and TPH levels in soil gas. The third well is proposed north of Weber Avenue, to provide lateral definition to the north. The fourth well will be placed southeast (downgradient) of the former Morton Paint operations. The fifth well will be installed east of the Well MW-7, as this wells contained petroleum hydrocarbons during the last quarterly monitoring event. Detailed procedures for the well installation are presented below. 5.1.1 Pre-Field Activities Prior to beginning any activities in the field, Access Agreements with the property owners must be completed. Once Access Agreements are in place, Clayton will prepare a Public Notice document for distribution to the residents of the apartments. This document will be presented on a single page, with English on one side and the Spanish translation on the other. This document will be prepared with the assistance and final approval of the Department of Toxic Substances Control (DTSC) and coordinated with any notices by the other parties investigating the areas west of Harrison. Interim review of the Public Notice document will also be conducted by the City of Stockton and the RWQCB. Prior to the start of fieldwork, Clayton will obtain drilling permits from the San Joaquin County Department of Public Health Services. Clayton will prepare a site specific Health and Safety Plan (HASP) for the proposed field activities. The HASP, which will be available on site during field activities, will be followed by all workers involved in field activities. The HASP was prepared in accordance with the requirements of Title 29 of the Code of Federal Regulations, Section 1910.120 and Title 8 of the California Code of Regulations, Section 5192. The HASP details the work to be performed, safety precautions, emergency response procedures, nearest hospital location, and onsite personnel respor3Sible for managing emergency situations. At least 48 hours prior to conducting the field activities, Clayton will mark the investigation areas with white paint, and notify Underground Service Alert for utility clearance, as required by law. In addition, Clayton will work with a private underground 5 PUS.\ESWR0JECf5\i001T01439(Jnucol Lincoln mE Weierovkp1N Z)\wkPN(deci)2).doc