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�gg9 ` .ANDERSON&ASSOCiA�TES, INC. L GFIN L+ R-I C:'R $-TESTING-1 rjao"TuRY&ERHICEs �V1G - SAM MEMITOOFt7CE CORPORA7EOF'F'ICE 4229 Northgate Boulevard Suite 3 22 Houston Lane GHM (MSoq-Ma4 Sacramento, California"Ou Lodi, California 95240 ETCCKTGM Cio"4M10M (910 929-9267 (20 367-S701 S O G�r RANCM CORDOVN Pla)M I-Sass FAX { t 929-9269 FAQ �09) 333-0303 Octtobor 21, 1999 Mr.Jay Yoak=4 R-E.H.S. Past-its Fax Ncfe 7671 °FAte>4-�O-qct mesh - Envirow=tal Health Division TO j-0 Linn 'roa " t U4 W 334 JE.Weber-Avenue 'f4t. advok im'. Co. ' ko" 4- 6`-soC- 3"'Floor Phone S t phone o1-170J $ CA x+5202 RE: Soil Suitabi*/NidraW Loaft ply Report Dated,912,V99 Job No. 599244 Musc o Olive Products 17950 Via Nicolo Tracy,California Dear Mir-YM13u)], Per our weetmg today,you requested a hatter clarilyi g if proposed now septic system at the Musm Olive Site will not negatively wipact the existing grmmd.water_ I u stand your cnmoem is that orrr report did not iarmstu to the relaticsndw between the existing nitrate levels found in the water well and the ukate loading estimaod fi-e m the septic system and ram water(the two sources ofnaratre caatammahm). 1-he water well and septic system are separated by approximately 1300 feet distance with the igpoxual gni www graidient most hlely flowing easttowwd.the galley_ The geologic f+ormaticins along the cast side of ho Diablo l<=ge clip t:award the east. In a o xi med aquifer,ground water will morre east alnag permeable zones imthe dip direction at the dip angle ofthe foamatitoos. k6pecfion awe Museo Olive well log c Mletaion report attached in the Appeadm ofthe refewowd xepmt mdkates the its are quAe heterogeneous and are congK med oftbit>mecbedded sands,clay,and shale. Clay wd shale and other fame-g named sedgtots tend to limit the vocal peircolahm of rairr&ll atm atbor Mand water rwbarge in addMon to providing ak ground water g banirer(atuifuge,aquitud,aquiclude). Our 40 foot bomg found similar carrdhioms in the shallow spa, sandy zwes gated by flute gradedwatmaJ.#batmcludeclay- Nogroundwaterryasencounter+ed_ 1•tnareasaableasumpmethat#bw =diftws occuz throughout the site. 'fie xesWts ofthewater sale f lnn theca uw wsll dicatedtlls -NO3 q�ticao was is 16.9 meNO, This value equates to 3.81 mg/I--N-The C nitod Stas CFec 14r,Sumy pradu!Ged a fto%szional Paper(1401-A)titled"Gmand Water in the Central Valley,Califaania—A Summary lwore,stating an Page ,A,-40, `Hall (1984) esdrnaed- that maximum concentrAian of nitrate under natumt condi6ms of the Sacramento Vallcyto be 3 mg/l(nitrate-I)and considered that areas having S_5 Yee(ni rateo-N)are those in wlvirh<nitrate concentratiam may be increasing_" If similar candi ms prevail hem the nitraite+cx centration ofwell mater 3.81 mg/1-N(dril it i water standard of 10 mON)is very closetothat ofuatuirsl c4neeatraficos fimnd in the Sacramento Valley_ We believe the septic effinedvaill mmwith rain viaw as assumed bythe uitrz6e mass balance formula ofliamaschc_ This fornmb predicts-die nitrate concentrafim ofthe redk-at a water to be belowthe maximum contaminate level for nitres of gra and water(10 nWA N). The paroulating effluerrt may travel down gradient alms impermeable layers and moa lonely not travel deeply. Evaporation,evapcbr mspirataoar, sorpti-cm and decompositiiaa to N2.gas wahm the shallow softs will utast likely cancan_ Because of the ZII d ��Ll '�fJ '008SY+ uosaepUV '0 1 !@N MCI 6661 'U' 100