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| American Water Works Association (AWWA) |
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| Ph (303) 794-7711 |
| www.awwa.org |
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| California Precast Concrete Pipe Assoc. (CPCPA) |
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| Ph (916) 685-6797 |
| www.cpcpa.com |
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| Canadian Concrete Pipe Association (CCPA) |
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| Ph (905) 877-5369 |
| www.ccpa.com |
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| Canadian Standards Association (CSA) |
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Ph (800) 463-6727
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| www.csa.ca |
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| Indiana-Kentucky-Ohio Concrete Pipe Assoc. (IKO) |
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| Ph (614) 227-8985 |
| www.ikocpa.com |
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| National Precast Concrete Association (NPCA) |
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| Ph (800) 366-7731 |
| www.precast.org |
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| Ontario Concrete Pipe Association (OCPA) |
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| Ph (519) 489-4488 |
| www.ocpa.com |
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| Precast Concrete Assoc. of New York (PCANY) |
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| Ph (585) 249-9564 |
| www.pcany.org |
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| Precast Concrete Assoc. of Virginia (PCAV) |
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| Ph (804) 377-2144 |
| www.gopcav.com |
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| Rubber Manufacturers Association (RMA) |
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| Ph (202)682-4800 |
| www.rma.org |
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| Wisconsin Concrete Pipe Assoc. (WCPA) |
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| Ph (608) 297-7070 |
| www.wcpa.com |
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