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AMENDMENT TO FEBRUARY, 1993 REPORT OF DISPOSAL SITE INFORMATION <br />CITY OF STOCKTON FRENCH CAMP LANDFILL <br />Page 2 <br />December 17, 1993 <br />AMENDMENT TO SITE DRAINAGE- PAGE 20 OF RDSI <br />Design and Drainage Calculations for Drainage Collection Elements <br />A storm design sheet and storm water drainage map are attached and <br />made a part of the RDSI. <br />AMENDMENT TO GROUNDWATER MONITORING - PAGE 21 OF RDSI <br />Evaluation Monitoring Program <br />VOC contamination was found in leachate taken from Monitoring Well <br />No. 1 (MW -1) in 1989. MW -1 is located next to French Camp Slough, <br />in the northwest corner of the landfill (see Figure 7 in RDSI) . <br />When MW -1 was drilled, refuse was hit four feet below groundwater. <br />The City suspects that the refuse was dumped in French Camp Slough <br />sometime during the early development of the landfill which opened <br />in 1938. In November 1989 The Regional Water Quality Control Board <br />(RWQCB) ordered the City to do a Verification Monitoring Program <br />(VMP) to determine the extent of groundwater impact. The VMP <br />concluded that the VOC contamination was limited to MW -1 and had <br />not reached downgradient monitoring wells MW -2, MW -3, and MW -4. In <br />December, 1992 the RWQCB ordered the City to conduct an Evaluation <br />Monitoring Program to determine if MW -1 contamination was <br />increasing. This program is now in progress. <br />