Laserfiche WebLink
IL <br /> STATE OF CALIFORNIA GEORGE DEUKMEJIAN,Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> -� <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 j 6 L <br /> i 0 1989 <br /> SERWICF­ <br /> 5 July 1989 <br /> Mr. Stephen Chen <br /> Deputy Public Works Director <br /> City of Stockton <br /> Citv Hall <br /> Stockton, CA 95202 <br /> SOLID WASTE ASSESSMENT TEST (SWAT) AND VERIFICATION MONITORING PLAN, AUSTIN ROAD <br /> LANDFILL, STOCKTON, CASE NO. 2148 <br /> We have reviewed the SWAT Report and have the following comments: <br /> 1. In the Executive Summary, you state "An air quality SWAT was <br /> conducted and submitted to the Regional Water Quality Control Board <br /> on September 29, 1989 (sic) by Mandeville and Associates. " We do <br /> not review air quality SWAT reports, and never received a copy of <br /> this report. Was anything found during the air SWAT that would <br /> indicate off-gassing of volatile organics? Please send us a summary <br /> or a copy of the air SWAT. <br /> 2. Also in the Executive Summary, you state that volatile organics were <br /> detected in CYA wells CYA-1 and CYA-2. The summary fails to say that <br /> these wells were sampled two more times, and that no volatile <br /> organics were confirmed. <br /> 3. Figure 4 is a cross section based on the logs of monitoring wells <br /> MW-3 and MW-4. The logs of the four monitoring wells are the basis <br /> for the assumption that the -lenses of clay, silt, and sand are <br /> continuous between the monitoring wells. However, the logs for the <br /> four monitoring wells are not included in the report. The well logs <br /> should either be included in the report, or the SWAT Proposal should <br /> be referenced as including the logs. <br /> 4. Surface water samples from Littlejohns Creek were not collected <br /> because the creek was dry at the time of sampling. Did the creek <br /> have water in it at any time during the course of the SWAT <br /> investigation, and if so, why was it not sampled at that time? <br /> 5. Vadose zone monitoring was accomplished by soil sampling in two <br /> borehole locations: one upgradient, and one downgradient of the <br /> landfill . Soil was sampled at one depth below the surface. At what <br />