§ 250.708. Postremediation care attainment.
(a) After engineering controls are in place and the groundwater concentration levels have stabilized following any effects from the remediation, a statistical test shall be used to demonstrate that regulated substances in groundwater do not exceed the selected standard at the point of compliance. A statistical trend analysis, knowledge of the plume stability, or other acceptable method shall be used to demonstrate that contaminant concentration at the point of compliance will not exceed the selected standard in the future.
(b) If engineering or institutional controls are utilized at a site to maintain the nonresidential Statewide health standard or the site-specific standard, a postremediation care program shall be implemented to protect human health and the environment.
(c) A person implementing engineering controls shall ensure the ongoing achievement of the performance standards in order to maintain attainment.
(d) A person shall implement a postremediation care plan, as identified in an approved final report.
(e) A person may terminate postremediation care as approved in the final report if the person can demonstrate attainment under this chapter without the engineering controls in place, and document a fate and transport analysis that shows the standard will not be exceeded in the future.
TABLE 8
CONSTITUENTS OF POTENTIAL ECOLOGICAL CONCERN
| METALS | ORGANICS |
| Arsenic III | Dichlorobenzene,1,3- |
| Arsenic V | Dichlorobenzene,1,4- |
| Barium | Dieldrin |
| Beryllium | Diethyl phthalate |
| Cadmium | Di-n-butyl phthalate |
| Chromium III | Endosulfan (mixed isomers) |
| Chromium VI | Endosulfan, alpha |
| Cobalt | Endosulfan, beta |
| Copper | Endrin |
| Iron | Ethylbenzene |
| Lead | Fluoranthene |
| Manganese | Fluorene |
| Mercury, inorganic | Heptachlor |
| Mercury, methyl | Hexachloroethane |
| Molybdenum | Hexachlorocyclohexane (Lindane) |
| Nickel | Kepone * |
| Selenium | Malathion |
| Vanadium | Methoxychlor |
| Zinc | Mirex * |
| Cyanide | Naphthalene |
| Pentachlorobenzene |
| ORGANICS | Pentachlorophenol |
| Acenaphthene | Polynuclear aromatic hydrocarbons |
| Aldrin * | Polychlorinated biphenyls (PCB) |
| Benzene | Phenanthrene |
| Benzo(a)pyrene | Pyrene |
| Biphenyl | Tetrachloroethane,1,1,2,2- |
| Bis(2-ethylhexyl)phthalate | Tetrachloroethylene |
| Bromophenyl phenyl ether,4- | Tetrachloromethane |
| Butylbenzyl phthalate | Toluene |
| Chlordane * | Toxaphene |
| Chlorobenzene | Tribromomethane |
| DDT (and metabolites) | Trichlorobenzene,1,2,4- |
| Diazinon | Trichloroethane,1,1,1- |
| Dibenzofuran | Trichloroethylene |
| Dichlorobenzene,1,1- | Xylenes |
| Dichlorobenzene,1,2-
|
Authority
The provisions of this Appendix A amended under sections 104(a) and 303(a) of the Land Recycling and Environmental Remediation Standards Act (35 P.S. § § 6026.104(a) and 6026.303(a)); and section 1920-A of The Administrative Code of 1929 (71 P.S. § 510-20).
Source
The provisions of this Appendix A amended November 23, 2001, effective November 24, 2001, 31 Pa.B. 6395; amended January 7, 2011, effective January 8, 2011, 41 Pa.B. 230; corrected February 11, 2011, effective January 8, 2011, 41 Pa.B. 840; corrected March 19, 2011, effective March 5, 2011, 41 Pa.B. 1458; corrected May 16, 2014, effective March 5, 2011, 44 Pa.B. 2975; corrected May 30, 2014, effective February 2, 2002, 44 Pa.B. 3235; amended August 26, 2016, effective August 27, 2016, 46 Pa.B. 5655; amended March 16, 2018, effective March 17, 2018, 48 Pa.B. 1503; amended November 19, 2021, effective November 20, 2021, 51 Pa.B. 7173; amended November 10, 2023, effective November 11, 2023, 53 Pa.B. 6998. Immediately preceding text appears at serial pages (407386) to (407441).
Cross References
This appendix cited in 25 Pa. Code § 250.301 (relating to scope); 25 Pa. Code § 250.304 (relating to MSCs for groundwater); 25 Pa. Code § 250.305 (relating to MSCs for soil); 25 Pa. Code § 250.306 (relating to ingestion numeric values); 25 Pa. Code § 250.308 (relating to soil to groundwater pathway numeric values); 25 Pa. Code § 250.310 (relating to minimum threshold MSCs); 25 Pa. Code § 250.311 (relating evaluation of ecological receptors); 25 Pa. Code § 250.312 (relating to final report); 25 Pa. Code § 250.605 (relating to sources of toxicity information); and 25 Pa. Code § 250.707 (relating to statistical tests).
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