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07/21/1999 14:06 2099430415 LESOVSF(V/DONALDSON D PAGE 03 <br /> 71 IL-19-;49- rq.— �Pn`l 0 iHALTT', '70HTROL Ct SP Tn 9430415 P.rig <br /> Og1110( f <br /> QIU <br /> ality Control Inspection nc. <br /> O raw 7O o..ca� � ,f\s ratYw\rwun.a�oc a.rorXSYo.ca\wtMwu f\iit .ewer:noel Ml+NO <br /> YraYK1 69 <br /> fitlC[TfMI(}M)\\\.\an r[acse floe gl?IU <br /> July 14, 1999 �+ A <br /> QCIN: E.-99-830 <br /> FOR: Mr Randy Smith <br /> Lesovsky-Donaldson Architects <br /> 4 South Central Court <br /> Stockton, CA 95204 <br /> PRO•TFCT! proposed University Public Schools <br /> 10042 North Highway 99 Frontage Road <br /> Stockton(Morada), CA <br /> SUBJECT: Percolation Testing for Septic System Design <br /> INTRODUCTION <br /> Quality Control inspection,Inc. has been retained by Mr. Randy Smith of Lesovsky-Donaldson <br /> Architects to conduct percolation testing at the above-referenced project. The proposed school <br /> building consists of a former strip center that is called the Morada Center. It is our understanding <br /> the school will occupy the entire building. Mr. Chance Wong of Wong Engineers. Inc. is the <br /> Civil Engineer for the project. <br /> The purpose of this investigation was to 1.)examine the underlying soil structure, 2.)conduct <br /> percolation testing and 3.)provide an interpretation of the data obtained. As requested by the <br /> San Joaquin Fnvironmental Health Department, information on the reliability of existing septic <br /> systems at this location was also evaluated. <br /> SUBSURFACE SOIL STRUCTURE <br /> Our subsurface soil investigation began with the preparation of the percolation test borings. A <br /> Mobile Drill B-53 Drill rig was used to bore two shallow test holes of 42 inches in depth and two <br /> deep bonngs of 25 feet As denoted on the attached site plan,one shallow and one deep boring <br /> was drilled in the area of the primary drainfield (denoted as "East Shallow/Deep") and a shallow <br /> and deep boring was drilled in the 100%replacement area(denoted as "West Shallow/Deep"). <br /> The deep borings were not extended past 25 feet since the County ordinances specify seepage pit <br /> depth to be a maximum of 25 feet. Sampling was accomplished with a split spoon sampler,with <br /> 18 inch samples retrieved from every five feet in depth The attached log of borings illustrate the <br /> subsurface s�i( stricture. <br /> 1 <br /> Oyr nOMI tn0 1\TIO\I\WdwUW Oi 111<COn1100nU\1 plOp\f1)'el puI CIIMIfi rd MII ee<IV41 V11.MY\VOb\IMn M rprp<y<UOn er arsleTOny.COnO!V OIOnO Ov OYXOOIO rrOT er <br /> reo Yr�InO>V.rpOn\Or INIMf Ir/\OOM1OC.!OMIngMI ue0IM wrrytT eul\OUi011en el OUO1XY r-Onfnal lnY}rtrlOn,Inc <br />