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Information Sheet IS-39 Reissued Waste Discharge Requirements General Order No. R5-2013-0122 Existing Milk Cow Dairies Table 1. Regional, State, and National Pond Liner Design Requirements Top 10 Milk Producing States (in order of highest Pond Liner Design Requirements to lowest milk production) California Title 27 of the California Code of Regulations: 10% clay and no greater than 10% gravel. Wisconsin Wisconsin Natural Resources Conservation Service (NRCS) Practice Standard 313: In-place soils (more than 50 percent fines and three feet thick), clay(maximum permeability of 1 x 10-' cm/sec), geomembrane (60 mil high density polyethylene or 60 mil linear low density polyethylene), geosynthetic clay liner, or concrete . New York No pond liner design requirements. Pennsylvania Pennsylvania NRCS Conservation Practice Standard 313: In place soils with acceptable permeability(see Appendix 10D below) or lined (soil liner with maximum seepage rate of 1 x 10- cm/sec, flexible membrane, bentonite, soil dispersant, or concrete Minnesota Any material that meets maximum seepage rate of 500 gallons per acre per da 5.0 x 10-' cm/sec). Idaho NRCS Agricultural Waste Management Field Handbook Appendix 10D see below). New Mexico Case-by-case but compacted clay orsynthetic is standard, maximum permeability of 1 x 10-' cm/sec Michigan Michigan NRCS Conservation Practice Standard 313: In soils with acceptable permeability (per ATendix 1 OD (see below) or lined (with one foot compacted earth with maximum seepage rate of 1 x 10- cm/sec and a minimum one foot compacted operations layer, flexible membrane, bentonite, or concrete). Washington Washington NRCS Conservation Practice Standard 313: Maximum soil permeability of 1 x 10-6 cm/sec or a compacted clay liner, amended soil or synthetic liner required meeting requirements of NRCS Conservation Practice Standards 521A through 521 D. Texas When no site specific assessment completed, one and a half foot of compacted clay with maximum permeability of 1 x 10-'cm/sec. Otherwise, "designed and constructed in accordance with technical standards of NRCS, ASAE, ASCE, or ASTM that are in effect at time of construction."