From Massachusetts to 

 /te^l^A Hawaii, letters came— hun- 

 ; jK || dreds of them. Each re- 



\ 4wml c ' uested the UN( ^ Sea 

 \ x Ys / nt Publication, Design 



and Installation of Low- 

 Pressure Waste Treatment Systems. 



What spurred the requests? Popular 

 Science, a national science magazine for 

 interested laymen. 



In its April issue, the magazine de- 

 scribed how the low-pressure pipe (LPP) 

 system can be used in areas where con- 

 ventional septic systems will not work. 



Almost 10 years ago, North Carolina 

 State University soil scientists Bobby 

 Carlile and Dennis Osborne developed the 

 LPP system as part of a Sea Grant project. 

 Conventional systems frequently failed in 

 porous coastal soils, spewing sewage into 

 the estuaries and contaminating water 

 sources. 



Coastal residents needed an alternative 

 waste treatment system. 



Under pressure from a pump, the sys- 

 tem uniformly distributes wastewater into 



the soil at intervals. The soil dries between 

 cycles, retaining its ability to purify waste. 



The LPP allowed hundreds of coastal 

 property owners to build on soils that 

 previously had been unacceptable. And it 

 provided the same benefits to inland prop- 

 erty owners trying to treat sewage in the 

 clay soils of the Piedmont. 



Now news of this unconventional system 

 has spread nationwide. If your septic sys- 

 tem is failing or you plan to build on 

 marginal soils, send for a copy of the LPP 

 manual. Ask for UNC-SG-82-03. The cost 

 is $3. 



The booklet includes information on site 

 and soil requirements, design, layout, 

 equipment specifications, installation pro- 

 cedures and maintenance. 



Sea Grant also published two other sep- 

 tic manuals— Design and Installation of 

 Mound Systems for Waste Treatment and 

 Pressure-Dosed Septic Systems: Electrical 

 Components and Maintenance. 



The mound system is a modified septic 

 system designed for use in shallow soils 

 that are not deep enough to properly 



purify effluent. To overcome this problem, 

 the mound system uniformly treats effluent 

 in fill material, using the same pressure- 

 dosed strategy as the LPP The mound 

 manual is $2.50, and its publication 

 number is UNC-SG-82-04. 



The electrical component manual de- 

 scribes dosing controls and accessories 

 suitable for pressure-dosed septic sys- 

 tems. It describes how to select, install and 

 maintain them. 



This manual should be used as a sup- 

 plement to the LPP and mound manuals. 

 Its publication number is UNC-SG-85-06. 

 The cost is $3. 



Coastwatch is published monthly except 

 July and December by the University of 

 North Carolina Sea Grant College Pro- 

 gram, 105 1911 Building, Box 8605, North 

 Carolina State University, Raleigh, N.C. 

 27695-8605. Vol. 16, No. 6, June/July 

 1989. Dr. B.J. Copeland, director. Kathy 

 Hart, editor. Nancy Davis and Sarah Friday 

 Peters, staff writers. 



105 1911 Building Nonprofit Organization 



Box 8605 ~ UR Posta 9 e 



PAID 



North Carolina State University Raleigh NC 



Raleigh, NC 27695-8605 Permit No . 896 



ADDRESS CORRECTION REQUESTED 



