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Table III: List of Organic Persistent and Bioaccumulative Toxic Substances <br />and Their Soluble Threshold Limit Concentration (STLC) <br />and Total Threshold Limit Concentration (TTLC) Values: <br />SUBSTANCE STLC (mg/1) TTLC (mg/kg) <br />Aldrin <br />0.14 <br />Chlordane <br />0.25 <br />DDT, DDE, DDD <br />0.1 <br />2,4-Dichlorophenoxyacetic acid <br />10 <br />Dieldrin <br />0.8 <br />8.0 <br />Dioxin (2,3,7,8-TCDD) <br />0.001 <br />0.01 <br />SUBSTANCE <br />STLC (mg/1) <br />Endrin <br />0.02 <br />0.2 <br />Heptachlor <br />0.47 <br />4.7 <br />Kepone <br />2.1 <br />21 <br />Lead compounds, organic <br />Lindane <br />0.4 <br />4.0 <br />Methoxychlor <br />10 <br />100 <br />Mirex <br />2.1 <br />21 <br />Pentachlorophenol <br />1.7 <br />17 <br />Polychlorinated biphenyls (PCBs) <br />5.0 <br />50 <br />Toxaphene <br />0.5 <br />5 <br />Trichloroethylene <br />204 <br />2,040 <br />2,4,5-Trichlorophenoxy pro pionic acid <br />1.0 <br />10 <br />(3) It has an acute oral LD50 less than 5,000 milligrams per kilogram; <br />(4) It has an acute dermal LD50 less <br />than 4,300 milligrams per kilogram; <br />1.4 <br />2.5 <br />1.0 <br />100 <br />TTLC (mg/kg) <br />13 <br />(5) It has an acute inhalation LC50 less than 10,000 parts per million as a gas or vapor; <br />(6) It has an acute aquatic 96 -hour LC50 less than 500 milligrams per liter when <br />measured in soft water (total hardness 40 to 48 milligrams per liter of calcium <br />carbonate) with fathead minnows (Pimephales promelas), rainbow trout (Salmo <br />gairdneri) or'golden shiners (Notemigonus crysoleucas) according to procedures <br />described in Part 800 of the "Standard Methods for the Examination of Water and <br />Wastewater (16th Edition)," American Public Health Association, 1985 and "Static <br />Acute Bioassay Procedures for Hazardous Waste Samples," California Department <br />Draft HMMP <br />March, 2000 <br />