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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 />