Laserfiche WebLink
MEMORANDUM <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL"W'' <br /> 3443 Routier Road, Suite A - Phone: (915) 58!9j3000 <br /> Sacramento,California 95827-3098 w!-PA I-NqT <br /> TO: Robert Fujii, Manager FROM: William J. Marshall, Chief <br /> Closure and Remediation Branch Chapter 15 Unit <br /> Integrated Waste Management Board <br /> 8800 Cal Center Drive <br /> Sacramento, CA 95826 <br /> DATE: 11 April 1994 SIGNATURE: <br /> v' <br /> SUBJECT: FORWARD LANDFILL,SAN JOAQUIN COUNTY (Case No.2209) <br /> We have reviewed the closure and postclosure maintenance plans dated September 1993 for <br /> Forward Landfill (the plans) . Our review indicates that most of the water quality protection <br /> aspects of the plans are in compliance with California Code of Regulations, Title 23, Division 3, <br /> Chapter 15 and the facility's waste discharge requirements (WDRs). However, several items need <br /> to be revised, primarily due to the recent implementation of Subtitle D. Changes to the cost <br /> estimates associated with these items are also necessary. <br /> The plans specify a standard Chapter 15 cap including one foot of clay barrier layer. Both Chapter <br /> 15 and Subtitle D require that landfill covers have the same or lower permeability than the liners <br /> under the landfill. Given the current requirements for composite (clay+geomembrane)base liners, <br /> the cover system should be revised to include a composite design. The static and seismic design <br /> calculations should be reviewed and revised if necessary to account for the use of a geomembrane <br /> in the cap. The cost estimate also needs to be revised. <br /> The monitoring and reporting program specified in Forward's WDRs, Order No. 94-014, has been <br /> changed since the plans were submitted. The monitoring program and associated cost estimates <br /> should be reviewed and revised as necessary. The plans omit sampling and analysis of the landfill <br /> leachate sumps. This omission should be corrected and the requirements of WDRs followed. <br /> With the revision to the cap design, the construction quality assurance (CQA) plan should be <br /> revised to include geosynthetics. The heading for Table 3, Column 4 in the CQA plan should read <br /> maximum loose lift thickness, not minimum. <br /> If you have any questions,please call Steve Rosenbaum at(916) 255-3131. <br /> SER <br /> cc: Mr. Harry Sneh,Department of Toxic Substances Control, Sacramento <br /> Mr. Greg Oliveira, San Joaquin County Public Health Services, Stockton <br /> Ms. Carrie Fisher,Forward Inc., Stockton <br /> Ms. Sangeeta Lewis, CH2M-Hill, Oakland <br />