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Advonced <br /> GeoEnviron mental , Inc . <br /> 19 April 2000 <br /> AGE-NC Project No. 98-0426 <br /> /!P/y <br /> Mr. Jeff Wong P V <br /> SAN JOAQLTN COUNTY PHS-EHD Erql"Iw <br /> 304 East Weber Avenue, 3rd Floor <br /> Stockton, California 95202 <br /> Subject: INIonitoring Well Installation Work Plan - Addendum <br /> CHARLIE'S DAY & NITE <br /> 706 North El Dorado Street, Stockton, California <br /> Dear Nlr. Wong: <br /> At the request of--\2r. Charles Skobrak of Charlie's Day& Nlite. Advanced GeoEnviroiunental, Inc. <br /> (AGE) has prepared this work plan addendum for the installation of two additional ground water <br /> monitoring <br /> c, wells at 706 North El Dorado Street, Stockton, California. The site setting is illustrated <br /> in Figure 1. A plan of the site is 'Illustrated on Figure 2. <br /> This work plan addendum is prepared in accordance Nvith San Joaquin County Public Health <br /> Services - Environmental Health Division (PHS-EHD) and Central Valley Regional Water Quality <br /> Control Board (CN7RWQCB) guidelines for the investi2ation of under-round storage tank (UST) <br /> C <br /> sites. Background Information for the site was summarized in Prelimina)-1? lnvesligalioiz and <br /> Evaluation Report - 3furch 1999, prepared by AGE. <br /> SCOPE OF NVORK <br /> Based on the results of laboratory analysis of soil and around water samples collected during <br /> previous site assessment activities, additional assessment is required to determine the lateral extent <br /> of the hydrocarbon-impact to ground water northeast of the forrner UST location and the vertical <br /> extent near the former UST location and <br /> The first monitoring well (temporary designation "A") will be installed approximately 15 feet <br /> northeast of?11W-3 to a depth of approximately 66Q feel sg and completed with 5 feet of slotted <br /> casing. The proposed screened interval is based on a possible confining laver encountered at a depth <br /> of 50 feet in boring B-1. The second monitoring well (temporary designation "B") will be Installed <br /> approximately 30 feet northeast of MW-3 to a depth of 35 feet below surface grade and completed <br /> with 20 feet of slotted casing. The proposed monitoring well locations are illustrated on Figure 2. <br /> -100 Nojih IvVikon <br /> Tclephorle 1209 1 10()() 1 AX i 2W); -467-I I P,' <br />