Laserfiche WebLink
KLEINEE L D E R <br /> CONCLUSIONS <br /> The results of our percolation tests indicate that the property is suitable for septic tank usage <br /> utilizing a leach trench disposal field designed in accordance with SJCPHS/EHD criteria. <br /> ow'ever, our nitrate loading calculation for the proposed commercial center indicates that the <br /> wastewater generated will have a nitrate as nitrogen (1) concentration at the groundwater level <br /> Zthan 10 mg/1. Based on these results, an on-site sewage disposal system consisting of a <br /> conventional septic tank and leach trench disposal field will not be acceptable per SJCPHS/EHD <br /> requirements. An on-site sewage disposal system will need to be installed at the proposed <br /> commercial center that will result in the wastewater discharged having a nitrate as nitrogen (I) <br /> concentration at the groundwater level no greater than 10 mg/l. Such a disposal system is the de- <br /> nitrification system manufactured by MicroSepTec of Laguna Hills, California. This sewage <br /> disposal system consists of a multi-chamber unit that recirculates the wastewater through four <br /> chambers to reduce the nitrate concentration of the effluent to 10 mg/1 or less. We understand <br /> that a similar system was approved by the SJCPHS/EHD and has been in operation for almost <br /> two years at an existing facility in Tracy, California. MicroSepTec reports that periodic testing <br /> on the effluent discharged by this system has resulted in a nitrate as nitrogen (1) concentration <br /> no greater than 10 mg/l. <br /> LIMITATIONS <br /> The conclusions of this report are based on the information provided regarding the existing and <br /> proposed development and on the site conditions encountered. <br /> This completes the scope of work requested. Our work was performed in general accordance <br /> with the standard of care that exists in San Joaquin County. No other guarantee or warranty, <br /> expressed or implied, is made. <br /> Respectfully submitted, <br /> KLEINFELDER,INC. <br /> a <br /> Anthony P. Mazzei Ron Heinzen, G.E. <br /> Senior Engineer Senior Principal <br /> APM:lr <br /> Attachments <br /> 20601.GO1/STO2R581 October 9,2002 <br /> ©2002 Kleinfelder,Inc. Page 4 of 4 <br />