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STECHER•AINSWORTH & ASSOCIATES <br /> LEONARD S. STECHER, M.E. <br /> MECHANICAL ENGINEERS <br /> KENNETH H. AINSWORTH. M.E. <br /> r' May 28, 1974 . <br /> San Joaquin Local Health District <br /> P. 0, Box 2009 <br /> Stockton, California 95201 <br /> Subject: Maintenance Facility Manteca Unified School District <br /> Our Project #1837 <br /> Gentlemen: <br /> Enclosed are prints showing proposed on site sewage disposal system <br /> to be provided at the subject project. This project is located in <br /> the vicinity of the existing administration facility at Louise and <br /> Airport Roads in Manteca. You may recall that a similar on site <br /> disposal system was installed on this site to serve the administration <br /> building in the early part of 1971 . <br /> It is our understanding that this facility will be used primarily for <br /> bus maintenance and warehousing of school district inventory. On that <br /> basis, we have designed the disposal system to accommodate 50 people <br /> at a rate of 30 gallons per day, per person. We feel that this design <br /> criteria is very liberal . In addition we used the "soil type constant" <br /> of . 175 which was previously given to us by your office in designing <br /> the existing on site disposal system. <br /> Based on the above criteria we have established system requirements as <br /> follows : <br /> (1) Septic tank size equals 1 ,500 gallons. <br /> (2) Linear feet of trench equals 1 ,500 x . 175 = 262 feet. <br /> We would appreciate receiving your comments with regard to the proposed <br /> system at your earliest convenience. It is our understanding that the <br /> facility is to be put out for bid in the very near future. <br /> Thank you for your cooperation. <br /> Very truly yours, <br /> STECHER-AINSWORTH & ASSOCIATES <br /> 1 <br /> Kenneth H. Ainsworth <br /> KHA/mac <br /> Encl . <br /> 5709 FREEPORT BLVD, • SACRAMENTO, CALIFORNIA 95822 • (916) 428 2381 <br />