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G..yau Coaea1- <br /> Table 3 <br /> Analytical Data Summary <br /> Western Farm Service,Inc.,Vernalis,California <br /> Pesticides(pg/L)In <br /> EPA 504(Mod.) SRL 524M EPA 632/8321A VOCs(µg/L)EPA 8010/EPA 8021B/8260B R91 <br /> Total Oxidizable N Ammonia as N <br /> Well No. (TOC Groundwater EPA 353.2/353.3/ EPA 350.3/SM `e d 8 <br /> Sample Date Elevation <br /> Elev.Feet MSL) SM 4500 4500 u <br /> (R MSL)* (mom)of (mg/L) DBCP EDB 1,2,3-TCP Bromacil Diuron Other e e q q q q a <br /> m U D <br /> 2/12 2002 62.78 11.9 3.5 <0.02 0.5 0.29 <1 <l ND 10.5 <0.5 10.5 <0.5 <0.5 <0.5 3.5 <0.5 NA <br /> 12/6/2001 63.19 16.3 3.5 <0.02 0.43 0.16 <1 <l ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1.50 <0.5 NA <br /> 8/6/2001 64.03 19.8 4.7 <0.02 0.39 0.1 <1 <1 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1.10 <0.5 NA <br /> 6/11/2001 63.75 19.8 6.0 0.08 <0.02 0.44 <1 <1 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 0.88 <0.5 NA <br /> 2/5/2001 63.36 16.6 8.90 <0.02 0.4 <0.02 <1 <1 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1 <0.5 NA <br /> 11/6/2000 63.89 -- 5.40 <0.02 0.23 <0.5 <1 <1 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1.2 <0.5 NA <br /> 8/15/2000 63.05 - 2.65 '0.0100 0.133 0.642 - <2.0 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 0.574 <0.500 NA <br /> 5/15/2000 65.12 -- 6.54 0.0560 0.743 <0.500 -- <2.0 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1.30 <0.500 NA <br /> 2/10/2000141 64.64 - 10.2 <0.0100 0.376 0.679 - <2.0 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1.26 <0.500 NA <br /> 11/18/19991"1 64.82 - 7.79 <0.0100 0.288 <0.500 - <2.0 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 1.34 <0.50 NA <br /> 8/17/1999 65.85 -- 7.99 <0.0100 0.288 <0.500 -- <1.0 ND <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.500 <0.50 NA <br /> 6/10/1999161 65.60 - 9.50 <0.010 0.183 11.0 - <1.0 ND <0.50 <0.50 <0.50 <0.50 <0.5 '0.50 1.4 <0.50 NA <br /> 3/2/19991'1 65.24 - 6.5 <0.010 0.41 <0.50 - 4.0 ND <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 1.8 <0.50 NA <br /> 12/8/1998 65.51181 -- 6.1 <0.010 0.42 <0.50 -- <2.5 ND <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 3.2 <0.50 NA <br /> 9/3/1998 66.95 - 5.7 <0.010 0.60 '0.50 - <2.5 ND <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 3.6 <0.50 NA <br /> 6/10/1998 67.21 -- 5.3 <0.010 1.1 <0.50 -- <2.0 ND <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 9.8 <0.50 NA <br /> 3/18/19981121 65.81 -- 6.1 <0.010 0.52 -- -- 'S.0 ND <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 2.3 <0.50 NA <br /> California Maximum <br /> Contaminant Level(MCL), <br /> June 2001 10 NA 0.2 0.05 NA NA NA NA (B) NA -- <br /> (IS) (IS) 115, 600 NA 16) (1]) (1]) 5 5 <br /> Notes: <br /> /=sample result/duplicate result. <br /> --=not analyzed <br /> J=Estimated value,below quantitation limit <br /> "NA"=not available <br /> "NR"=not reported <br /> `Groundwater Elevations based on 31 August 2007 Survey(NAVD 29) <br /> MSL-mean sea level <br /> (1)Beginning in 2005,samples analyzed for nitrate-nitrite as N by SM 4500 <br /> (2)All target compounds below reporting limits unless listed. (12)Monitoring wells MW4 and MW-5 were also analyzed for EPA Methods 619 and 8150 pesticides because March 1998 was first round <br /> (3)VOCs analyzed by EPA Method 8010(1996-August 1999),EPA Method 8021B(November 1999-August 2003),EPA Method 8260B(March 2004-current) of monitoring for these new wells.All EPA Method 619 and 8150 target analytes were below reporting limits. <br /> (4)Nitrate as nitrate concentrations reported by the laboratory we converted to nitrate as nitrogen by dividing by 4.43. (13)In past sampling events,MW-2 samples/duplicates had one-time detections of methiocarb(EPA 632)on 6/5/97 at 6.2/6.0 ug/L(no MCL), <br /> (5)Estimated value,sample analyzed outside holding time. propham(EPA 632)on 12/10/97 at 25 ug/L(no MCL),diazinon(EPA 8140)on 12/23/96 at 0.52/1.0 ug/L(14 ug/L AL), <br /> (6)Samples were analyzed for nitrate-nitrite as nitrogen. 1,4-dichlorobenzene on 3/18/98 at 2.7/2.3 ug/L(5 ug/L MCL),chlompropham on 8/15/00 at 5.7/4.7 ug/L(no MCL),and carbohman at 7.1 ug/L(18 ug/L MCL). <br /> (7)The equipment blank had detected concentrations ofnitrate(1.2 mg/L)and ammonia(0.18 mg/L).Ammonia analyzed using SM4500. (14)Laboratory reanalyzed samples and confirmed results.The 223 mg/L measurement in MW-2 is identical to the nitrate detected in <br /> (8)There was an error in 12/8/98 well gauging measurements collected during the sampling event.Measurements shown are from 1/20/99 re-gauging MW-3,and is suspected to be an error in mislabeling sample bottles in the field.Future monitoring will be used to confine this assumed error <br /> (9)Analyzed using EPA Method 8260. (15)Total trihalo nethanes(sum of bromodichlorr methane,dibromochloromethane,bromof rmn,and chloroform),MCL=100 ug/L. <br /> (10)Laboratory indicated that methylene chloride detection may be from laboratory contamination. (16)Chemical listed with California Drinking Water Standards as an unregulated compound requiring monitoring. <br /> (11)Dec.1996 samples also analyzed using EPA Methods 619 and 8150;all target compounds below reporting limits in all samples. (17)California taste and odor threshold action level=130 mg/L for sum of 1,2-dichlorobenzene and 1,3-dichlorobenzene. <br /> Page 10 of 13 4/21/2020 <br />