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• DDJOacy Well Installation Work Plan <br /> 2.2.3 Lithologic logging of the soils obtained 2.5 Location Surveying <br /> from the borehole will be documented in <br /> accordance with the procedures outlined in the Coordinates and elevation surveying will be <br /> Comprehensive Field Work Plan. performed in accordance with the <br /> Comprehensive Field Work Plan. <br /> 2.3 Monitoring Well Construction <br /> 2.3.1 Monitoring well construction procedures 2.6 Investigation Derived Wastes <br /> will be performed in accordance with those <br /> outlined in the Comprehensive Field Work Plan. Investigation derived wastes (IDW),consisting <br /> The proposed monitoring well location is shown of soil cuttings and groundwater purged during <br /> in Figure 2-1. Monitoring well construction well development,will be managed in <br /> details for proposed well LM174AU are accordance with procedures described in the <br /> presented below. DDRW-Sharpe/Tracy Waste Management Plan <br /> (August 1996). <br /> • Well casing will be 6-inch nominal diameter <br /> Schedule 40 blank PVC casing from to 20 3.0 REFERENCES <br /> feet(6-inch diameter casing and screen will <br /> be installed for possible future conversion to Rust Environment and Infrastucture, <br /> a groundwater extraction well,if needed). 1999.Summary of Dieldrin Data and <br /> Recommendations for the Northwest Corner of <br /> • The well screen will be 6-inch nominal the DDJC-Tracy Site and the Western Annex. <br /> diameter stainless steel slot screen, 0.020 19 May 1999. <br /> inch slot size from approximately 20 feet to <br /> 40 feet bgs. Radian Corporation, 1998. Defense <br /> Distribution Depot San Jacquin(DDJC)- <br /> • The wellhead will be constructed with a Sharpe/Tracy Sites. Comprehensive Field Work <br /> flush-mounted,traffic rated,utility box. Plan. Final(Version 2.0). October. <br /> 2.3.2 Filter pack material, bentonite seal Radian Corporation, 1996.DDRW- <br /> support sand, bentonite seal, and annular space Sharpe/Tracy Waste Management Plan. Final. <br /> grout seal will be placed in accordance with <br /> guidelines set forth in the Comprehensive Field August. <br /> Work Plan. <br /> 2.3.3 Precise well screen placement will be <br /> determined based on observed lithology from <br /> soil cores and depth at which groundwater is <br /> encountered. All well construction details will <br /> be documented accordingly. <br /> 2.4 Well Development <br /> The monitoring well will be developed after <br /> well casing installation. Well development <br /> procedures will follow those outlined in the <br /> Comprehensive Field Work Plan. <br /> WELLINSTI 3 October 1999 <br />