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MONITORING AND REPORTING PROGRAM -8- FORWARD INC.,FORWARD LANDFILL SAN JOAQUIN COUNTY I . Constituents of Concern a. For landfills lacking a functioning LCRS: For any landfill that does not have both a liner and a leachate collection and removal system (LCRS) that produces leachate: i. The"COC list" (list of Constituents of Concern required under 23 CCR 2550.3) shall include all constituents listed in Attachment F, and the following additional COCs: dissolved or total organic carbon, dissolved iron,carbonate, bicarbonate, alkalinity, dissolved aluminum, dissolved chromium VI, and dissolved manganese. The discharger shall monitor all COCs every five years. ii. For each Attachment F constituent that is newly added to the landfill's COC list due to this order,the Discharger shall establish a reference background value by analyzing at least one sample each quarter from each Background Monitoring Point for a period of at least one year, beginning with the date of this Program. Once this reference set of background data is collected,the Discharger shall include it as a separate, identified item in the next monitoring report submittal. b. For WMUs having a functioning LCRS: For any WMU equipped with both a liner and a leachate collection and removal system (LCRS) that produces leachate: i. The COC list shall include: (1) all waste constituents listed in the waste discharge requirements as of the effective date of this Order; and (2) each Attachment F constituent that is not already a COC for the WMU, and that both: (a) is detected in a sample of the WMU's leachate which the discharger shall collect during Fall of each year; and (b) is also detected in a retest leachate sample collected the following Spring. The discharger need take and analyze this retest sample only in cases where the annual leachate sample, taken the previous Fall under this section, identifies new-COCs. The retest sample shall be analyzed only for the new-COCs detected in the Fall sample; and (3) the following additional COCs: dissolved or total organic carbon, dissolved iron,carbonate,bicarbonate, alkalinity, dissolved aluminum, dissolved chromium VI, and dissolved manganese.