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+•+ Work Plan for Refined Plume Definition and Management offloating Product-9500 W 111h St., Tracy, CSI. Page 31 <br /> a� <br /> Well Casing Total Purpose <br /> Number Diameter Depth <br /> MWFP-3 continued <br /> �,. 75 ft down-gradient of MW-7. If no LNAPL is present <br /> on the groundwater at that location, the well will assist <br /> ... �J� fit. ti definition of the northern limit of' down-gradient <br /> y�'e floating product migration. If LNAPL is present in that�� well, it will serve to monitor the progress of the <br /> �• v' �' proposed floating product remediation program. <br /> MWFP-4 0.75 in. 15 ft. To assist definition of the extent of the plume in that <br /> -- area, this floating product monitoring well is located <br /> l� ��°� some 450 ft down-gradient from the point of release of <br /> fuel hydrocarbons on the 7500 West Eleventh Street <br /> property, a short distance to the west of the area that is <br /> currently estimated to be affected by LNAPL. <br /> .� MWFP-5 0.75 in. 15 ft. This floating product monitoring well is also located <br /> some 450 ft down-gradient from the point of release of <br /> fuel hydrocarbons on the 7500 West Eleventh Street <br /> property, but it is positioned a short distance to the east <br /> �. of the area that is currently estimated to be affected by <br /> N sd LNAPL. <br /> f f <br /> MW-15 6 in 25 ft. This dual-function monitoring well will serve to check <br /> for the presence of LNAPL along the plume axis <br /> N� approximately 450 ft down-gradient from the point of <br /> release of fuel hydrocarbons on the 7500 West Eleventh <br /> Street property. If, at the time of its installation, no <br /> LNAPL is found in the groundwater, the well will serve <br /> its primary function as a groundwater-quality <br /> monitoring well, but will also provide a means to detect <br /> the first arrival of floating product at that down-gradient <br /> location should the plume of LNAPL advance that far. <br /> It will have a 6-in diameter casing so that, if necessary, <br /> this well may also be used to recover floating product. <br /> 8.2 Well Drilling and Soil Sampling <br /> Permits for construction of the proposed floating product monitoring wells will be obtained <br /> from the SJCEHD. Where necessary, application will be made to the San Joaquin County <br /> +" Department of Public Works (SJCDPW) for encroachment permits to install wells in the <br /> public highways. Bonds to ensure proper maintenance of such wells will also be secured. <br /> ` The well borings will be advanced using hydraulic push boring technology. The drill pipe <br /> �-► and cutting head will be 2 in. in _r, The hydraulic push boring equipment will be <br /> Na <br /> sic <br />