Butylbenzene, n- cleanup levels by state
- CAS 104-51-8
- 2 states
CAS 104-51-8 is in the cleanup-level tables of 2 states in this handbook: Pennsylvania (BUTYLBENZENE, N-) and Texas (Butylbenzene, n-). Each state's numbers are below as its agency prints them. The states run different programs and do not define their values the same way, so a number from one is not the same measure as a number from another. A state that lists the substance under another CAS number, or without one, is not shown here.
Pennsylvania
- PA DEP
- Act 2 Statewide Health Standards
For BUTYLBENZENE, N-, DEP's Statewide Health Standard tables print 1,700 μg/L for residential groundwater in a used aquifer with TDS up to 2500, 10,000 mg/kg for residential soil direct contact from 0 to 15 feet, and two residential soil to groundwater values for a used aquifer with TDS up to 2500: 170 mg/kg as 100 X GW MSC and 1,100 mg/kg as the generic value.
- 1,700μg/L 1700 R Table 1: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Groundwater Used Aquifers, TDS ≤ 2500
- 10,000mg/kg 10000 0-15 feet Table 3a: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Soil: A. Direct Contact Numeric Values Residential
- 170mg/kg 100 X GW MSC Table 3b: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Soil: B. Soil to Groundwater Numeric Values Used Aquifers, TDS ≤ 2500, Residential
- 1,100mg/kg 1100 Generic Value Table 3b: Medium-Specific Concentrations (MSCs) for Organic Regulated Substances in Soil: B. Soil to Groundwater Numeric Values Used Aquifers, TDS ≤ 2500, Residential
Texas
- TCEQ
- TRRP Tier 1 PCLs
- February 6, 2025
For Butylbenzene, n-, TCEQ's Tier 1 table prints 3,300 mg/kg for TotSoilComb and 150 mg/kg for GWSoilIng (residential soil, 0.5 acre source area), and 1.2 mg/L for GWGWIng (residential groundwater).
- 3,300mg/kg 3.3E+03 TotSoilComb Table 1: Tier 1 Residential Soil PCLs 0.5 acre source area
- 150mg/kg 1.5E+02 GWSoilIng Table 1: Tier 1 Residential Soil PCLs 0.5 acre source area
- 1.2mg/L 1.2E+00 GWGWIng Table 3: Tier 1 Groundwater PCLs - Residential and Commercial/Industrial Residential
Each agency's own publication governs: its current table, or the published rule where the agency says so. This page is a reference copy and not a cleanup decision. Check each agency's page before relying on a value.
Source
- Pennsylvania Department of Environmental Protection, Statewide Health Standard Medium-Specific Concentrations.
- Table 1: DEP's file dated April 14, 2022, read October 5, 2026.
- Table 3a: DEP's file dated January 4, 2022, read October 5, 2026.
- Table 3b: DEP's file dated January 19, 2022, read October 5, 2026.
- Texas Commission on Environmental Quality, Texas Risk Reduction Program Tier 1 Protective Concentration Levels, last revised February 6, 2025. File read October 1, 2026.