Laserfiche WebLink
WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2014-0006 -13- <br />FORWARD INC. AND REPUBLIC SERVICES INC. <br />FORWARD CLASS II LANDFILL <br />SAN JOAQUIN COUNTY <br /> <br /> <br />incorporated into a regular monitoring program as part of a revised MRP. The Discharger’s <br />detection monitoring program for groundwater at the landfill satisfies the requirements <br />contained in Title 27. <br />51. The existing unsaturated zone monitoring system for the landfill consists of: <br />Unit Monitored Type Monitoring Points <br />F – North Suction E-1, E-2, W -1, W -2 <br />F – West Suction LY-Pond-N, LY-Pond-S <br />Background Suction LY-BG-1 <br />Forward <br /> <br />Austin Road <br />Suction <br /> <br />Suction <br />LY-A, LY-E1A, LY-E1B, LY-E2A, LY-E2B, D93A, <br />D93B <br />FU-03, FU-04W, FU-04E, FU-05, FU-06 <br />Forward Pan D-01S, D-01N, D-02 <br />Austin Road Pan FU-03, FU-04W, FU-04E, FU-05, FU-06 <br /> <br />Landfill units built after 2001 are constructed with pan lysimeters below the landfill sump <br />as a final check of the integrity of the base liner. New landfill units at Austin Road have a <br />suction lysimeter in addition to the pan lysimeter. In recent years, lysimeters at new units <br />have not been sampled on a regular basis. This Order requires quarterly monitoring of all <br />currently existing and any future lysimeters if liquid is present. <br />52. Volatile organic compounds (VOCs) are often detected in a release from a MSW landfill and <br />are often associated with releases of landfill gas rather than leachate. Since volatile organic <br />compounds are not naturally occurring and thus have no background value, they are not <br />amenable to the statistical analysis procedures contained in Title 27 for the determination of <br />a release of wastes from a landfill unit. Title 27, sections 20415(e)(8) and (9) allows the use <br />of a non-statistical evaluation of monitoring data that will provide the best assurance of the <br />earliest possible detection of a release from a landfill unit in accordance with Title 27, <br />sections 20415(b)(1)(B)2.-4. However, Title 27 does not specify a specific method for non- <br />statistical evaluation of monitoring data. <br />53. The Central Valley Water Board may specify a non-statistical data analysis method pursuant <br />to Title 27, section 20080(a)(1). Water Code section 13360(a)(1) allows the Central Valley <br />Water Board to specify requirements to protect groundwater or surface waters from leakage <br />from a solid waste site, which includes a method to provide the best assurance of <br />determining the earliest possible detection of a release. <br />54. In order to provide the best assurance of the earliest possible detection of a release of non- <br />naturally occurring waste constituents from a landfill unit, the SPRRs specify a non-statistical <br />method for the evaluation of monitoring data for non-naturally occurring compounds. The <br />specified non-statistical method for evaluation of monitoring data provides two criteria (or <br />triggers) for making the determination that there has been a release of non-naturally <br />occurring waste constituents from a landfill unit. The presence of two non-naturally occurring