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Dommber 16,2M <br />Job Number. LG02-213 <br />PW4 <br />period of 12 bours prior to collection of the seanple, The analysis indicated that nitrate was <br />found at 77 tnV -NO, for the lune 28, 2002 samples This lcvel is approximately 1.7 times <br />higher than the drinking water limit for nitrate. <br />'Ilse occupants of the residence on site were verbally notified regarding the highnitmle <br />level measured in the well water by Rollin Hall of out office. We understand that the occupants <br />had beat aging bottled water far cottstunption. Tablc-2 pro rides a summary of the ground water <br />information available for the site_ <br />Thble 2. <br />Summary bf Available Ground Water Information: <br />Mte,,Dt"ptian, Source <br />- Gmundwater tkpth <br />Nates <br />AMC 13.,fc f� `r"16ratory_t ) <br />Greater than 10 feat to depth- <br />No growsd water found to u <br />boring, Feil 0. A.nderum &awes <br />trawl depth of 10 feet <br />Inc. <br />June 7, 2002, Cyst p-vund-water sample <br />Ground -water depth not mcasored <br />Nim ie: 124 mplL •N0., <br />obtained from the cxistiing domestic we1L <br />in wc1L <br />VBCP: Not Detected <br />June 28'. 2002. second ground-waic� sample <br />Ground -crater depth nae measured <br />Nittme_ 77 mj%4 -no, <br />obtained fmrn the existing dnmcs- is wr.1L <br />in wetL <br />Neo Q. Anderson & Assoc., Inc. <br />Fall 1998 ; &3 i Joaquin County Ground <br />About 23 feet in depth <br />Gradirm above S.3 fihni. <br />Water Shap_ See Plates 2 & 4. <br />flowing ncnth <br />Spmn� -1999, Saar krauluin County Ground <br />About 23 feet in depth. <br />Gredwm about 5.0 Mini. <br />water Maps .^,err Plate 3 & i <br />flowing iuo %Vest <br />The presence *17 nitrates and OBCP ide not unaymman in shallow ground -water aquifers <br />in San Joaquin County and other parts of the Central Valley. Nitratc in ground water occurs as a <br />result of the application of fertilizers, livestock waste, and untreated septic tank waste, Nitrate is <br />ile <br />moband olien accumulates in the shallow ground -water zones. <br />In tho early 1900's, natural levels of nitrate in ground water were measured in font' -three <br />(43) wells throughout -the Sacrwnenm Vatley by Bryan! It was thought that gmvnd water at that <br />1 Brpw. K., 103. Geology wad ground -"ver rewurces of Sacrww ca Valley -of t Lbfi tn,ia-- U.S_ <br />(%�►tog;att SutvGy Wrier -Supply Paprer 495, 28Sp, <br />