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t <br /> TABLE 4 SUMMARY OF MONTGOMERY WATSON'S MONITORING ROUNDS FOR METALS -- ARSENIC, CHROMIUM, AND MANGANESE -- <br /> ABOVE BACKGROUND CONCENTRATIONS (SEPTEMBER 1992, JANUARY 1993. AND APRIL 1993) (continued) <br /> DISSOLVFD(NR/L) TOTAL(pB/L) <br /> WELL NO, ARSENIC CHROMIUM MANGANESE WELL ARSENIC CHROMIUM MANGANESE <br /> 9/92 1193. 1193 9192 1193 4193 9/92 1/93 4/93 NO• 1 9192 1 1/93 4/93 9/92 1193 4/93 9191 1/93 4193 <br /> 'LM 103A 3.0 2.R 4.3 <7.4 <7.4 <5.0 NA 1.8 <25 LM103A 4.6 65" 4.6 17.4 9.4 10.9 NA 83 H' 104.0 <br /> LM 104A 5,4` 5.2" 5.3 <7.4 <7.4 5.0 NA 67.2 121.0 LM104A 5.2° 5.1" 3.2 <7.4 <7.4 6.0 NA 51.9 45.2 <br /> •LMIOfiA <2.3 NA <2.5 NA NA 8.6 NA NA 6.0 •LM106A <2.3 NA 7.4 11B NA 97.8 NA NA 1,100.0 <br /> LM107C 25 NA <25 22.3 NA 14.6 NA NA 35 LM107C 2.3 NA <25 20.3 NA 17.6 NA NA 13.7 <br /> EPA MCL 50.0 100.0 50.0' EPA MCL 50.0 100.0 50.01 <br /> DI IS MCL/ DIIS <br /> ACI1(IN LEVEL 50.0/5.0" 50.0 50.01 MCL/ 50.0/5.0' 50.0 [3.5 <br /> 0.p <br /> ACDON <br /> LEVEL <br /> 11M M R(IUND <2A- <2.3 16.6-241 3. DACKGR <2.0- <2.3 19.6- 267 - ).7 <br /> OUND <br /> ' Note:'Mcsc wells are to be Redeveloped in August 1993: LM14A, LM15A,LM17A,LM25A, LM27AA,LM32A, LM43A, LM103A and LM106A. <br /> • <br /> Sccond:vy M(l.!nr mangancsc. <br /> " (':difilt rim (1•rnposilion 65)Action Level. <br />