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North County Recycling Center and Sanitary Landfill Monitoring Implementation Plan Page 10 4.1.4 Standard Industrials Classification Code Sampling Parameters The San Joaquin County facility operates under the Standard Industrial Classification (SIC) code 4953 for “landfills, land application sites, and open dumps”. Landfills are listed under Category #5 of Attachment A of the General Permit requiring permit coverage. Section XI.B.6.d requires that facility with General Permit coverage are to sample additional sampling parameters listed in Table 1 based on a facility’s SIC code or codes. For the SIC code of 4953, Table 1 adds iron to the sampled parameter sampling listing. Should a Table 1 listed sampling parameter not be a potential pollutant based on industrial activities, a facility can be exempted from sampling that Table 1 listed sampling parameter upon approval of the Regional Water Quality Control Board (Regional Board). 4.1.5 Applicable TMDLs & 303(d) Listed Impairments General Permit Sections I.F and X.G.2.ix requires a facility to include as part of its pollutant assessment any applicable TMDLs listed in General Permit Attachment E and applicable impairments listed in California 2010 303(d) list [303(d) list] found in Appendix 3 for the receiving Hydrologic Unit Code 10 watershed (HUC 10 watershed). Currently Attachment E has no TMDLs listed for the landfill’s receiving water body. Any applicable TMDLs, and 303(d) listed impairments for North County Landfill’s Bear Creek HUC 10 (ID# 1804000304) are listed in MIP Table 4.1.8. 4.1.6 Regional Water Board Required Sampling Parameters A facility is to add any additional sampling parameters required by the Regional Board to its list of sampling parameters. To date the Regional Board has not added to San Joaquin County any additional sampling parameters. 4.1.7 Effluent Limitation Guidelines Sampling Parameters Any facility subject to Subchapter N, Effluent Limitation Guidelines (ELGs) as outlined in General Permit Attachment F of the General Permit. Landfills are listed under Category #5 of Attachment A of the General Permit requiring permit coverage. Furthermore, operators of landfills are required to comply with Part 445 of 40 CFR Chapter I, Subchapter N, which specifies effluent limitation guidelines (ELGs) for specific categories of industrial storm water discharges. Applicable ELGs for this facility are listed in Table 4.1.8. 4.1.8 Toxic Release Inventory (TRI) Chemicals Also, Section X.G.1.d.ii of the General Permit states that facilities with toxic chemicals identified in 40 Code of Federal Regulations Section 302 and oil and hazardous substances in excess of reportable quantities from 40 C.F.R. §§ 110, 117, and 302 (TRI reported chemicals) that have discharged from the facility’s storm water conveyance system within the previous five-year period must be include as sampling parameters. The San Joaquin County has no TRI reporting chemicals.