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E NV1ft()1lME ti i Al.HEALI H KLEINFELDER PFPMlr '.' ' �t. ,u, ,1111��tI�.,'�Y 02 DEC 19 PM 4= 34 File No. 20-0268-01 December 19, 2002 Mr. Neil Pollard 10464 N. Highway 99 Stockton, CA 95212-1818 Subject: ADDENDUM TO SOILS SUITABILITY AND NITRATE LOADING STUDY DATED DECEMBER 5, 2002 POLLARDVILLE RESTAURANT AND THEATRE COMPLEX 10464 N. HIGHWAY 99 STOCKTON, CALIFORNIA Dear Mr. Pollard: Following our meeting with Mr. Ray Borges of the San Joaquin County Environmental Health Department (EHD), attached is the design of the reserve septic system prepared by Don Chesney Consulting of Turlock, California. Apparently, in the use permit dated July 12, 2000 operations other than the restaurant and theatre described in our nitrate loading study were mentioned, such as guided tours, special events, weddings in the gazebo, museum retail sales, etc. Based on our discussions with you, we understand that these activities have always occurred at this facility but may not be reflected in the flow quantities calculated from your pump test and electric bills. EHD requires that these activities be incorporated into the nitrate loading study. We understand that these events are sporadic at best therefore, the increase in sewage flow is difficult to evaluate. For simplicity we have proposed a daily flow of 5,000 gallons per day seven days a week compared to the 3,500 gallons per day figure described in the referenced report. Mr. Borges has approved the use of this conservative figure which amounts to a 43 percent increase. The only parameter this change impacts is the value of"A" which is the number of units per acre. Instead of approximately 24 equivalent residential units on the 12.2 acre parcel the increased wastewater flow now corresponds to 33 units. The revised value for "A" is therefore 33 divided by 12.2 which is approximately 3. The revised calculations are presented below. Ne = 3(2)(5)(1 — .35) +.5(10.8) = 19.5 + 5.4 = 1.5 mg/1 as N 3(2)+ 10.8 6+10.8 As noted above the revised calculation for Nc is still less than the permissible value of 10 mg per liter. The value for Ne is 9.6 mg/1 even if Nµ, is assumed equal to 40 mg/1 as shown on Page 5 of the previously referenced report. The other item requested by Mr. Borges is a plan for the reserve septic system. Attached please find the report prepared by Don Chesney Consulting as well as the site plan showing the location of the replacement system. This site plan also shows the locations of all existing leach lines,pits, 20-0268-01 /ST02R398 Page 1 of 2 Copyright 2002 Kleinfelder,Inc. December 19,2002 KLEINFELDER 2825 East Myrtle Street,Stockton,CA 95205-4794 (209)948-1345 (209)948-0621 fax