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Foothill Landfill Monitoring Implementation Plan MIP Page 11 4.0 Sample Management One grab sample of discharge from each outfall is collected for discharges during the reporting year as described in MIP Section 3.0. This section describes the management of the samples after collection. Included in this section are sample preservation techniques, sample storage, descriptions of the analyses and parameters to be analyzed, the appropriate analytical methods to be used, required documentation, and the proper quality assurance/quality control (QA/QC) procedures to follow. 4.1 Narrative Assessments San Joaquin County annually reviews and evaluates its activities in light of the storm water discharge observations and analytical data from each outfall. 4.1.1 Sampling Parameters The General Permit in Section XI.B outlines storm water sampling parameters that are to be analyzed. The sampling parameters are to be analyzed using sufficiently sensitive test methods in compliance with 40 CFR Part 136, or 40 CFR Chapter I, subchapters N and O in order “to detect and quantify pollutants at or below the applicable water quality criteria, action levels, or effluent limitations” for any applicable NPDES permit.20 4.1.2 Universal Sampling parameters All storm water discharges are to be sampled for Total suspended solids (TSS), oil and grease (O&G), and pH. 4.1.3 Facility-Specific Sampling Parameters The General Permit requires in Section X.G.2.a.ii to assess “pollutants likely to be present in industrial storm water discharges and authorized NSWDs.” Then in Section XI.B.6.c the General Permit also requires that dischargers are to include in their monitoring programs other parameters that are facility-specific (based on the General Permit Section X.G.2.a.ii assessment) and are indicators of the presence of potential pollutants present in storm water from the facility’s industrial pollutant sources. In addition, the General Permit requires dischargers to include in their monitoring programs other parameters that are facility-specific and are indicators of the presence of potential pollutants present in storm water from the facility’s industrial pollutant sources. Since paper and organic trash and debris are a common waste stream handled at this facility, the facility will add Biochemical Oxygen Demand (BOD) and ammonia to its list of analytes. Heavy metals aluminum, cadmium, copper, iron,21 lead, nickel and zinc are also potential pollutants associated with landfill activities and the equipment maintenance and are added to the list of analytes. Since oils, greases, diesel and gasoline fuels, and propylene glycol are present and potential pollutants, indicator tests of oil & grease; benzene, toluene, ethylbenzene, and xylenes (BTEX) will be used to test for the potential presences of these 20 see 2018 Industrial Storm Water General Permit Amendment Fact Sheet at https://www.waterboards.ca.gov/water_issues/programs/stormwater/docs/industrial/igp_factsheet_final.pdf or Amended General Permit Section I.K.69 21 See SWPPP Section 12.3.2 - Level 2 ERA Technical Report