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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2003-0049 -22- FORWARD INC. AND ALLIED WASTE INDUSTRIES FOR OPERATION OF FORWARD CLASS II LANDFILL SAN JOAQUIN COUNTY c. Background for water samples or soil-pore gas samples shall be represented by the data from all samples taken from applicable background monitoring points during that reporting period (at least one sample from each background monitoring point). The Discharger may propose an alternate statistical method [to the methods listed under 27 CCR §20415(e)(8)(A-D)] in accordance with §20415(e)(8)(E) of Title 27, for review and approval by the Executive Officer. 19. The method shall be implemented as follows: a. For the Volatile Organic Compounds Monitoring Parameter For Water Samples [V0CWQ1e,]. For any given monitoring point, the VOC�at,Monitoring Parameter is a composite parameter addressing all "qualifying VOCs" (in this case, VOCs that are detected in less than 10% of background samples). The Discharger shall conduct verification testing(see Detection Monitoring Specifications E.21. and E.23 below, as appropriate)to determine whether a release of VOC,at,Monitoring Parameter has occurred if the data for any monitoring point meets either of the following triggering conditions: 1) The data contains two or more qualifying VOCs that equal or exceed their respective MDLs; or 2) The data contains one qualifying VOC that equals or exceeds its PQL. b. For the Volatile Organic Compounds Monitoring Parameter For Soil Pore Gas Samples[VOCspgl: the VOCspg Monitoring Parameter is a composite parameter for soil pore gas addressing all "qualifying VOCs"detectable using either GC or GC/MS analysis for at least a ten liter sample of soil pore gas (e.g., collected in a vacuum canister). It involves the same scope of VOCs as does the VOCwater Monitoring Parameter. For the VOCspg test, "qualifying VOCs"consist of all those VOCs which are detectable in less than 10% of background soil pore gas samples. The Discharger shall conduct verification testing(see Detection Monitoring Specifications E.21. and E.23 below, as appropriate)to determine whether a release of VOCspg Monitoring Parameter has occurred if the data for any monitoring point meets either of the following triggering conditions: 1) The data contains two or more qualifying VOCs that equal or exceed their respective MDLs; or 2) The data contains one qualifying VOC that equals or exceeds its PQL.