Simplified Testing for Lead and Copper in Drinking Water, Booklet No. 19
12Pages

שHach Company, 1994. All rights are reserved. Lit. No. 7038F42Printed in U.S.A. >

lead levels can varygreatly from tap to tap in the same structure. Thepresence of copper at the tap results mainly from low-pH water dissolving copper from the copper piping used in plumbing systems. > Current USEPA regulations for lead and copper are long, complex and comprehensive. Maximum contaminant level goals (MCLG) and action levels, as well as treatment techniques and monitoring requirements, are mandated. The usual requirements for public notice, record keeping and reporting, variances, exemptions, and compliance schedules (based on system size) are in effect. In addition,...

CharacteristicGFAASLeadTrak 1. Can be doneon sitenoyes in laboratoryyesyes2. Approved by USEPAyes pending (note 1)for reporting(furnace)3. Skill level neededhighlow/med 4. Time requiredto set up30 minutes3 minutes per test5 minutes10minutes5. Costto set up$10-100,000$300-1600 per test$20-35$4-56. Detection limit1 g/L2 յg/L 7. Range1-100 g/L2-150 յg/L8. Calibrationweekly/direct reading/daily check weekly check 9.Interferencesmolecular absorbanceSee listas well as chemical andin methodmatrix effectsӔ (note 2) Notes: (1) Submitted data to USEPA for approval in January, 1990. As of February 1,...

1. the water in the system being tested is assumed to haveconsistent characteristics; and 2. once a comparability study has been done and consistentresults are obtained, the compared method may be used by anyone. 10 different water source samples 3-4 sub-samples from each, and 3 analyses using each of the 2 methodsThis is a total of 180-240 tests plus a number of qualitycontrol (QC) checks. Screening tests are also required to determine if the samples contain a detectable level of analyte. If not, they must be spiked. The data manipulation for proving the two sets of resultsare equivalent...

precision and accuracy on a range of standards determination of operator-related bias comparison of results to GFAAS results on standards effects of interferences recovery of spikes in various drinking waters sample preservation and QC considerations > While the authors purpose was not to approve the test kit,the results are encouraging for using the kit as a practical field analysis method. They found the detection limit of the test kit to be 4 ҵg/L. Above that level they determined that the accuracy of the GFAAS and test kit procedures in spiked deionized water [standards] were...

p. 353-363.11. Hach Co. unpublished data. (1990) 12. P. Wiese, ԓMonitoring Method for Lead in First-DrawDrinking Water Samples, presented at the 1989 AWWA Annual Conference (June 19-23, 1989).13. D. A. Lytle et al, ԓInvestigating the PreferentialDissolution of Lead from Solder Particulates, Schock and George also found the method does require neutralization of nitric acid added for preservation (per instructions). They determined the best approach for split sample comparison was to split the sample and them use the appropriate preservative for each halfԗpPb-1 for LeadTrak samples and nitric...

- x 24.4397 - y 24.5603 Slope 1.0464r = .9926 Outlier(Suspected error) = Best Fit of Data = Perfect Fit r value = Scatter of Points (1.000 = no scatter) > Hach LeadTrakg/L Pb Intercept = 1.014 >

Required Reagents Required Reagents (Using Powder Pillows) > LeadTrak, reagent set, 20 tests/pkgŅŅ1ŅŅ23750-00 Qty/DescriptionTestUnitCat.No. CuVer 1 Copper Reagent Powder PillowsŅŅŅŅ1 Ņ50/pkg14188-66 Qty/DescriptionTestUnitCat.No. Required Apparatus > Cylinder, graduated, polypropylene, 100 mLŅŅŅŅŅŅ1ŅeachŅ1081-42Cylinder, graduated, polypropylene, 25 mLŅŅŅŅŅŅ1ŅeachŅŅ1081-40Beaker, polypropylene, 250 mLŅ1ŅeachŅ1080-46Beaker, polypropylene, 150 mLŅ1ŅeachŅŅ1080-44Support, ring standŅŅŅ1ŅeachŅŅ563-00 Clamp, two-prong extensionŅ1ŅeachŅ21145-00 Clamp, holderŅŅŅŅŅ1ŅeachŅ326-00 Clippers,...