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Eco: LOGIC <br /> _ ri <br /> June 18, 200$ Consulting Engineers _ 4 <br /> ,SUN .2 3 24 8 <br /> ` Principals <br /> ENVIE ON'I�IE'111 1 EALTR David R.,Bennett <br /> PRIMi /5ERVI✓ES Charles G. Bunker <br /> Jack A. Harbour <br /> Jeffrey R.Hauser <br /> 0.Todd,Kotey <br /> Richard E.Stowell <br /> Hobert W.Emerick <br /> • Gerry O.LaBudde <br /> Mr. Ted Tasiopoulos, REHS Steven L. Beck <br /> San Joaquin County Environmental Health Department . <br /> 600.East MainStreet <br /> Stockton,'CA 95202 <br /> ARE:_ `Holt sf` 4alif6rnia On-Site Wastewater System, 8'853 S. M'anthey Road, French `-- <br /> Camp, CA <br /> Dear Ted <br /> We are writing you to confirm certain design requirements far'the on-site wastewater treatment <br /> system for treating equivalent domestic wastewater for the proposed Holt of California facility to be <br /> located at 8853 S. Manthey Road. ECO:LOGIC has been retained by Holt'of California and .KSN <br /> Inc. to provide design services for the domestic wastewater treatment`system.. We understand.that a <br /> revised Soil .Suitability;'Nitrate-Loading Study,'dated Novembers 30;".2007 ?prepared by Neil O. <br /> Anderson & Associates was submitted'6 the'Environmental Health Department (EHD)'_early this <br /> month. -Based-on that report;,we also understaiid that the EHD will require that="tlie''on-site-treatment <br /> system. de designed .to "mitigate the..potential impact to groundwater" from eff_ luent nitrogen by' <br /> providing supplemental treatment. - <br /> In order to proceed with design of the on-site-domestic wastewater treatment system for review and <br /> permitting by the EHD, we are requestind4revievvi of the revised Soil Suitability/Nitrate Loading <br /> Study and confirmation of its approval. We are also requesting confirmation of the design effluent . <br /> limit to meet the "mitigation" recommendation contained in the Nitrate Loading Study. Assuming, <br /> the same wastewater nitrogen strengt ilu'1tbn, and soil -denitrificaiton factors contained in the <br /> _ <br /> Nitrate Loading Sludv, an. approxi ate.AM,o reduction in wastewater nitroven,:would be required <br /> through treatment to result in an ave e_p olaied water nitrogen concentration less thamgl - <br /> However, we understand.that supplemental treatment systems that are to be designed to }pro ater <br /> -quality will be requiredto .meet a 30-day average effluent-total nitrogen concentration of 10 mb/L <br /> (Section 24913 (0) of the draft March 13, 2007 draft regulations for Onsite Wastewater Treatment <br /> Systems) regardless of the possibility of_justification of-an alternative limit. The.draft_regulations <br /> also contain performance requirements for- effluent BOD and/or-TSS for supplemenWa -treatrnent <br /> systems, where zither a 3 average-effluent BOD of 25.mg/L must be met or both the 3.0-day <br /> average c Fflu,nt BOD and-total suspended'solids must be less than 30 mgiL: each. <br /> Plea corikirm t at these effluent,limits'wi 1.1 be 'ap'licable f6l"this site for the. n7-site vh,�:�tewatei.. <br /> treat ent sys to meet the-`requirements"to mitigate the potential impact'to groundvv!ateir from" <br /> wastewater nitrogen. Up.�n-your confirmation,. we will be proceeding with design of chis system fc:i <br /> submittal tai the EHD. <br /> 3520 Brookside Road's--suite 141 •Stockton,.California 95219 • Phone (209) 242-0292 • Fax (209) 461-6444 <br />