United Slates Environmental Protection Agency Office of Ground Water and Drinking Water Technical Support Division EPA-814-K-92-002 September 1992 <>EPA Labcert Bulletin Welcome to the Rule Clarification Labcert Bulletin This issue addresses updates to the drinking water regu- lations and gives you a centerfold for handy reference. The center pages can be extracted and hung on your wall and should help you determine the current rule and method that corresponds to each regulated contaminant. The table is to be used as a reference. If there arc any discrepancies between it and 40 CFR, please keep in mind that the Code is correct. If you do notice discrepancies, please bring them to our attention. If this is not your copy and you would like one or a past copy, contact the editors listed below. We will be happy to add your name to our mailing list. Please call or write if we can be of help or if you have comments or suggestions. The Editors Edward M. Glick 513-569-7939 Mary Ann Feige 513-569-7944 Carol Madding 513-569-7402 In This Issue Rule Clarification The Significance of MDLs in the Rules 1 Update on the Total Coliform Rule 2 Update on Ascorbic Acid 2 Resources 3 Update on Phase II 4 Phase V 4 TTHM/VOC Certification 4 SDWA Contaminants Centerfold Labcert Bulletin The Significance of MDLs in the Rules VOCs Attainment of the MDLs listed for VOCs (0.0005 mg/L) is a requirement for certification. A laboratory must be able to achieve the listed MDL in spiked reagent water to be certified to perform compliance monitoring for VOCs. If this level cannot be achieved, the laboratory cannot be certified to perform VOC monitoring. Compositing is allowed for up to five VOC samples, but in compositing, the MDL achieved in the laboratory (as- suming a five-sample composite) must be at least one-fifth the listed MCL. All sample compositing must be done in the laboratory and the composite samples analyzed within the holding time listed in the method. The composited sample is made of an equal volume from each individual sample. The final volume of sample must be adequate for the method used. If a contaminant listed in the Rules is found at a concen- tration >0.0005 mg/L, an individual sample from each sampling site must be analyzed. If the samples used to make up the composite sample were collected in duplicate, and the holding time listed in the method has not been exceeded, then the duplicate samples may be analyzed and resampling is not required. The data must be reported to the state within 14 days of sample collection. (See 40 CFR 141.24 (14) p. 613.) SOCs The MDLs listed for the SOCs in Phases II and V arc used to justify granting waivers to the required monitoring frequency. It is not necessary for the laboratory to attain these listed MDLs to be certified, only levels low enough to ensure the accuracy of the data at the MCL value. If an analyte is not detected above the listed MDL, then a waiver in monitoring frequency may be granted by the state. A petition for the waiver must be made to the state and, on their approval, the frequency of sampling may be reduced. However, if the MDL in the Rule cannot be achieved, then all samples analyzed by the laboratory for that analyte may be considered to have an occurrence and monitoring waiv- ers may be denied. Astate may allow compositing of up to five SOC samples to reduce the number of samples a system must analyze. All sample compositing must be done in the laboratory and the composite samples analyzed within the holding times listed in the method, not to exceed 14 days. The MDL achieved in the laboratory for the individual (Continued on page 3) ------- Update on the Total Coliform Rule The Federal Register notice June 10, 1992 [57 FR 24744] amends 40 CFR 141.21(f) and allows the use of MMO-MUG test for the detection of Escherichia coli (E. coli). This amendment to the Total Coliform Rule concerns the Minimum Medium ONPG-MUG (MMO-MUG) test for total coliform analysis. On January 8,1991 EPA deferred approval of the MMO-MUG test for E. coli detection. EPA also restricted the transfer of cultures from total coliform-positive MMO-MUG tests. This notice relieves the restrictions. In this ammendment, the EPA recommends the use of the 6-watt, 366-nm ultraviolet lamp for the detection of E. coli since, in studies, a 6-watt lamp detected slightly higher MUG-positive reactions than a 4-watt lamp. The MMO-MUG medium was changed from the inorganic phosphate buffer to an organic (hepes) buffer in April 1990. The Agency maintains that this change is minor and should not reduce the effectiveness of the Colilert test. The rationale is based on three factors: 1) Only the buffer was changed. 2) Data show that the hepes buffer is inert to E. coli. 3) Several enzymes produced by E. coli, though not associated with the MMO-MUG test, exhibit higher activity in a prepared test solution containing hepes buffer than in one containing the phosphate buffer. This indicates the hepes buffer may be less inhibitory for the two enzymes of interest in the MMO-MUG test. Data gathered by the Agency indicates that the new MMO-MUG test recovers coliform at least as frequently as the MTF test, and exhibits greater sensitivity than the MF & P-A tests. The E. coli docket contains information and data generated on comparison tests of the two formulations. Ingredients per liter for the new formulation are listed below: Ammonium sulfate 5 g. Manganese sulfate 0.5 mg. Zinc sulfate 0.5 mg. Magnesium sulfate 100 mg. Sodium sulfate 10 g. Calcium chloride 50 mg. Sodium sulfite 40 mg. Amphotericin B 1 mg. Orthonitrophenyl-P-D-galactopyranoside (ONPG) 500 mg. 4-methylumbellifery 1-(5-D-glucuronide (MUG) 75 mg. Solarium1 500 mg. Hepes Buffer: Sodium salt 5.3 g. 2 Organic Acid 6.9 g. Solarium is a mixture of plant extracts used as a dispersent. 2N-2-hydroxy-ethylpiperazine-N-2-ethane-sulfonic acid (The formulation is listed here only for informational purposes. It is expected that no one will try to prepare their own.) EPA encourages laboratories to perform parallel testing between the MMO-MUG test and other approved tests for E. coli for at least several months to assess the effectiveness of MMO-MUG for the specific water type being analyzed. Additional information may be obtained by reading the Federal Register notice. Update on Ascorbic Acid A survey of drinking water samples from eight locations around the country which previously reported losses in brominated THMs preserved with ascorbic acid, was conducted by the Technical Support Division (TSD). Results to date indicate there is no significant loss of brominated THMs. However, it would be wise for each laboratory to determine if such a loss could be occurring in their water samples. 2 ------- Preservation and Holding Times for Regulated Parameters i PARAMETER/ METHOD PRESERVATIVE I SAMPLE E IOLDING I TIME EXTRACT I IOLDING TIME SAMPLE SIZE rYPE OF CONTAINER 1 | Metals (except Hg) HNO3 pH <2 6 months 1 L Plastic or Glass 1 I Mercury HNO3 pH <2 2 8 days 100 mL Plastic or Glass | I Alkalinity Cool, 4C 1 4 days 100 mL Plastic or Glass | | Asbestos Cool, 4C Plastic or Glass | | Chloride none . £8 days 50 mL Plastic or Glass [ 1 Residual Disinfectant mmediately 200 mL Plastic or Glass 1 1 Color Cool, 4C 48 hours 50 mL Plastic or Glass | 1 Conductivity Cool, 4C 28 days 100 mL Plastic or Glass | 1 Corrosivity 1 Cyanide Cool, 4C, NaOH pH>12, Ascorbic acid 14 days 1L Plastic or Glass 1 1 Fluoride none 1 month 300 mL Plastic or Glass I 1 Foaming Agents Cool, 4C 48 hours I Nitrate (chlorinated) Cool, 4C 28 days 100 mL Plastic or Glass 1 1 Nitrate (non-chlorinated) Cool, 4C, H2SO4, pH <2 14 days 100 mL Plastic or Glass | | Nitrite Cool, 4C 48 hours 50 mL Plastic or Glass I 1 Odor Cool, 4C 24 hours 200 mL Glass 1 1 PH none immediately 25 mL Plastic or Glass 1 1 o-Phosphate Cool, 4C 48 hours 50 mL Plastic or Glass 1 | Silica Cool, 4C 28 days 50 mL Plastic | | Solids, Total Dissolved Cool, 4C 7 days 100 mL Plastic or Glass | 1 Sulfate Cool, 4C 28 days 50 mL Plastic or Glass | | Temperature none immediately 1L Plastic or Glass | | Turbidity Cool, 4C 48 hours 100 mL Plastic or Glass | I Coliform, E. Coli, Fecal 1 Coliform Cool, <10C Sodium Thiosulfate 30 hours 100 mL I Heterotrophs Room temperature or Coo 4C 6 hours or 24 hours 100 mL I 501.1,501.2 Sodium Thiosulfate or Sodium Sulfite 14 days min. 25 ml Glass with Teflon-Lined 1 Septum | 1 502.1,502.3,503.1 Sodium Thiosulfate or Ascorbic Acid, 4C, HC1 pH <2 14 days min. 25 m L Glass with Teflon-Lined 1 Septum I I 504 Sodium Thiosulfate Cool 4C, HC1 pH <2 28 days 40 mL Glass with Teflon-Lined 1 Septum 1 505 Sodium Thiosulfate Cool 4C 14 days (7 days for Heptachlor ) 40 mL Glass with Teflon-Lined Septum ------- Primary and Secondary Drinking Water Regulations DATE OF EPA METHOD5,7 PARAMETER REGULATED MCV [SMCLJ MCLG PROMULGATION/ ACCEPTANCE mgfb mg/L PROPOSAL LIMIT Aluminum1 [0.05-0.21 1-30-91 202.1, .2,200.7,8 ,.9 ± 30% Antimony2 0.006 0.006 7-17-92 204.2,200.8,.9, Gaseous Hydride ±15% Arsenic 0.05 _ 2-19-88 206.2..3..4, 200.7A Barium1 2 2 7-1-91 200.7,208.1,.2 ± 15% Beryllium3 0.004 0.004 7-17-92 210.2,200.7,,8,.9 ± 15% Cadmium3 0.005 0.005 1-30-91 213.2,200.7 ±20% 2 Calcium _ 6-7-91 215.1,-2,200.7 Chromium3 0.1 0.1 1-30-91 218.2,200.7 ±15% u g Copper4,1 1.3/90*4 ri.01 1.3 6-7-91,1-30-91 220.1..2,200.7..8..9 ±10% Iron1 [0.3] _ 1-30-91 236.1,-2,200.7 Lead4 0.015/90%4 zero 6-7-91 239.2,200.8,.9 ± 30% Manganese1 [0.05] 1-30-91 243.1,.2,200.7 Mercury1 0.002 0.002 1-30-91 245.1,245.2 ±30% Nickel2 0.1 0.1 7-17-92 249.1,.2, 200.7..8..9 ± 15% Selenium3 0.05 0.05 1-30-91 270.2, Gaseous Hydride ±20% Silver1 [0.1) 1-30-91 272.1,.2, 200.7,.8,.9 Sodium 2010 8*27*80,6-7-91 273.1,200.7 Thallium3 0.002 0.0005 7-17-92 279.2,200.8..9 + 30% Zinc1 [5.0] 1-30-91 289.1,200.7 Alkalinity4 6-7-91 310.1, Titration Asbestos3 7MF/L>10pm 7MF/L>10 pm 1-30*91 TEM 2 StdDev Chloride' 1250] 1-30-91 See rule Residual Disinfectant' detectable 6-29-89 See rule Color1 [15cu] 1-30-91 U0.2 Conductivity4 6-7-91 120.1 Corrosivity1 [non-corrosive] 1-30-91 Lanftlier Index, Aggressive Index y z. Cyanide2 0.2 0.2 7-17-92 Manual distillation followed by 335.1,.2,.3, Electrode ±25% < o Fluoride1 4.012.0] 4-2-86 1-30-91 340.2, distillation followed by 340.1 ,.3 ± 10% 06 Foaming Agents' [0.5] 1-30-91 425.1 Z Nitrate (as N)3 10 10 1-30-91 353.1,.2,.3,300.0A + 10% Nitrite (as N)3 1 1 1-30-91 353.2..3i 354.1.300.0A + 15% Nilrate/N itrite (as N)3 10 10 1-30-91 353.1,.2,,3,300.0A Odor1 [3ton] 1-30-91 140.1 pHM 6.5-8.5 [6.5-8.5] 6-7-91 1-30-91 150.1..2 o- Phosphate4 6-7-91 365.2,.3,300.0A Silica4 6-7-91 370.1,200.7 Solids (TBS)1 1500] 1-30-91 160.1 Sulfate1' deferred [250] deferred 7-17-92 1-30-91 375.4 Temperature4 - 6-7-91 TUrbidity* Treatment 6-29-89 See rule Coliform1 45% positive sample*Ano zero 6-29-89 MF, MTF, P-A, MMO-MUO £3 < E. Coil* no positive repeat sample zero 6-29-89 EC MUG, Nutrient Afar with MUG, MMO-MUG with subculture © 0 *5 *»* Fecal Coliform1 no positive repeat sample zero 6-29-89 EC test » o *2 CO GiarJia Lambtia* lYtetmeot zero 6-29-89 Heterotopic Bacteria or Residual Disinfectant' Treatment 6-29-89 Pour plate, see rule Treatment zero 6-2949 Treatment zero 6-29-89 1 - Secondary Maximum Contaminant Level non-enforceable fedefal guidelines for aesthetic quality 2 Phase V Regulations promulgated 7-17-92 3 Phase II Regulations promulgated 1-30-91 and 7-1-91 4 Led anj Copper Rule promulgated 6-7-91; approved methods must be used for lead, copper, and water quality parameters; lead and copper levels are Action Levels 5 Secondary contaminants must be analyzed using approved methods in laboratories approved by the states; primary contaminants must be analyzed using approved methods in laboratories certified by the states 6 Radionuclides Proposed Rule 7-14-91 7 Only EPA methods have been lifted here; additional methods are listed in the rule. 8 Coliform and Surface Water Treatment Rules promulgated 6-29 -89 9 Methods 505 and 508 are used for s creening and method 5 08A is used to quantify 10 Recommended level * The acceptance limits for VOCs are ±20%0.010mg/L and ±40%mg/L ------- DATE OF PARAMETER REGULATED MCV [SMCLJ MCLG PROMULGATION/ EPA METHOD5'7 ACCEPTANCE mg/L mg/L PROPOSAL LIMIT Trihalomethanes (Total) 0.10 11-29-79 501.1,-2 ± 20% Benzene 0.005 zero 7-8-87 502.2, 503.1, 524.1,2 Carbon tetrtchloride 0.003 zero 7-8-87 502.1,.2,524. U2 Chloro benzene3 0.1 0.1 1-30-91 502.1,.2, 503.1,524.1,2 p-D ich loro benzene 0.075 [0.005] 0.075 7-8-87 5-89 502.1..2,503.1,524.1,2 o-D i chloro ben zene3 0.6 0.6 1-30-91 502.1,.2, 503.1,524.1,.2 1X- Dichloroethane 0.005 zero 7-8-87 502.1,.2,524.U2 g 1, t - Dichlo methylene 0.007 0.007 7-8-87 502.1, .2,524.12 c-l,2*DichJoroethylene5 0*07 0.07 1-30-91 502.1,-2,524. lr2 » t-1 2-Dichloroethylene3 0.1 0.1 1-30-91 502.1 ,.2, 524.1 ^2 o Dichlorom ethane1 0.005 zero 7-17-92 502.1,-2, 524.1..2 > 12- Dichloro pro pane5 0.005 zero 1-30-91 502.1..2. 524.1,2 ±40% Ethyl benzene3 0.7 0.7 1-30-91 502.2, 503.1, 524.1,1 Styrene3 0.1 0.1 1-30-91 502.2,503.1,524.1,2 Tetrachloroethylene3 0.005 zero 1-30-91 502.1,.2, 503.1,524.1,1 Toluene3 1 1 1-30-91 502.2,503.1,524.1,2 1,2,4-Trichlorobenzene1 0.07 0.07 7-17-92 502.2, 503.1,5242 ±40% 1,1.1 -Trichloroethane 01 0.2 7-8-87 502.1,-2,524.1,2 * 1.1 2-Trichloroethane2 0.005 0.003 7-17-92 502.1,.2, 524.1,2 ±40% Trichloroethylene 0.005 zero 7-8-87 502.1,.2, 503.1.524.1,2 Vinyl chloride 0.002 zero 7-8-87 5011,2,524.1..2 Xylenes (Total)1 10 10 1-30-91 502.2,503.1,524.1,2 Alachlor1 0.002 zero 1-30-91 505,507,525.1 ±45% Aldicarb1 Postponed Postponed 5-27-92 531.1 2 StdDev Aldicarb Sulfoxide5 Postponed Postponed 5-27-92 531.1 2 StdDev Aldicarb Sulfone3 Postponed Postponed 5-27-92 531.1 2 StdDev Atrazine3 0.003 0.003 1-30-91 505, 507,525.1 ±45% Carbofuran3 0.04 0.04 1-30-91 531.1 ±45% tS Q O H Chlordane3 0.002 zero 1-30-91 505,508,525.1 ±45% 2.4-D3 0.07 0.07 1-30-91 515.1 ±50% Dalapon2 02 0.2 7-17-92 515.1 2 StdDev 2 DibrDmochloropropane(DBCP)3 0.0002 zero 1-30-91 504 ±40% <3 Dinoseb3 0.007 0.007 7-17-92 515.1 2 StdDev Diquat2 002 0.02 7-17-92 549 2 StdDev a Endothall3 0.1 0.1 7-17-92 548 2 StdDev M u Endrin2 0.002 0.002 7-17-92 505, 508.525.1 ±30% so Elhy lened ibromide( ED B )3 0.00005 zero 1-30-91 504 ±40% u u Glyphosale2 0.7 0.7 7-17-92 547 2 StdDev X lleptechlor1 0.0004 zero 1-30-91 505, 508,525.1 ±45% Heptachlor epoxide' 0.0002 zero 1-30-91 505, 508,525.1 ±45% Lindane3 0.0002 0.0002 1-30-91 505, 508,525.1 ±45% Methoxychlor* 0.04 0.04 1-30-91 505, 508,525.1 ±45% Oxamyl2 (vydate) 02 0.2 7-17-92 531.1 2 StdDev Pentachtoropbenol' 0.001 zero 7-1-91 515.1,525.1 ±50% Pidoram2 0.5 0.5 7-17-92 515.1 2 StdDev Simuine2 0.004 0.004 7-17-92 505. 507,525.1 2 StdDev Tbxaphene3 0.003 zero 1-30-91 505.508,525.1 ±45% 2,4,5-TP (Silvex)3 0.05 0.05 1-30-91 515.1 ±50% Hex achloro benzene2 04301 zero 7-17-92 505, 508,525.1 2 StdDev Hcxachlorocyclopenudtene2 0j05 0.05 7-17-92 505. 525.1 2 StdDev Benzo(a)pyrene2 0.0002 zero 7-17-92 550, 550.1,525.1 2 StdDev E p PCBs3 (as decachlorobi phenyl) 0.0005 zero 1-30-91 505, 508 508A* 0-200 mft/L 2,3,7,8-TCDD( Dioxin)2 3x10-8 zero 7-17-92 1613 2 StdDev o Aery faun ide3 Treatment zero 1-30-91 Epichlorohydrin3 Treatment zero 1-30-91 Di(2-ethylhexyl)adipete2 0.4 0.4 7-17-92 506,525.1 2 StdDev Di(2-ethylbexyl)phthalate2 0006 zero 7-17-92 506, 525.1 2 StdDev Adjusted Gtocs Alpha* lSpCi/L zero 7-18-91 900.0 ±50% Beta Particle Emitter** 4 mrtai ode per year zero 7-18-91 900.0 ±30% radioactive Cesium _ 901.0 ±30% e radioactive Iodine 902.0 ±30% y radioactive Strontium _ 905.0 ±30% 2 tritium - 906.0 ±20% 2 Q gamma&photon emitters 901.1 2 Radium-226* 20 pCi/L zero 7-18-91 903.0, .1 ±30% Radium-228* 20pCi/L zero 7-18-91 904.0 ±50% Radon-222* 300 pCi/L zero 7-18-91 903.1,913.0 ±30% Uranium* 0.02 zero 7-18-91 908.0, .1 ±30% ------- I PARAMETER/ | METHOD 1 506 PRESERVATIVE Sodium Thiosulfate Cool, 4C, Dark SAMPLE HOLDING TIME 14 days EXTRACT HOLDING TIME 4C, dark 34 days SAMPLE SIZE 1L TYPE OF CONTAINER Amber Glass with 1 Teflon-Lined Cap I 507 Mercuric Chloride Sodium Thiosulfate Cool, 4C 14 days (see method for exceptions) 4C, dark 14 days 1 L Glass with Teflon-Lined 1 Cap 1 508 Mercuric Chloride Sodium Thiosulfate Cool, 4C 7 days (see method for exceptions) 4C, dark 14 days 1 L Glass with Teflon-Lined 1 Cap 1 I 508A Cool, 4C 14 days 30 days 1 L Glass with Teflon-Lined 1 Cap I I 515.1 Mercuric Chloride Sodium Thiosulfate Cool, 4C 14 days 4C, dark 28 days 1 L Glass with Teflon-Lined 1 Cap 1 1 524.1,524.2 Ascorbic Acid HC1 pH <2, Cool 4C 14 days 40 mL Glass with Teflon-Lined 1 Septum I 1 525.1 Sodium Sulfite or Sodium Arsenite Cool, 4C, HCI pH <2 7 days 30 days 1L Glass with Teflon-Lined 1 Cap | I 531.1 Monochloroacetic acid, pH <3, Sodium Thiosulfate, Cool, 4C Freeze, -10C, 28 days 60 mL Glass with Teflon-Lined 1 Septum 1 I 547 Sodium Thiosulfate Cool, 4C 14 days (18 mo. frozen) 1 day 60 mL Glass with Teflon-Lined | Septum | 1 548 Cool, 4C 7 days 1 day 60 mL Glass with Teflon-Lined 1 Septum I I 549 Sodium Thiosulfate, H2SO4 pH 2, Cool, 4C, Dark 7 days 21 days 1L High Density Amber PVC I orSilanized Amber Glass 1 I 550,550.1 Sodium Thiosulfate Cool, 4C 7 days 40 days Dark, 4C, HCI pH <2 1L Amber Glass with 1 Teflon-Lined Cap 1 I 1613 Sodium Thiosulfate, Cool, 4C 40 days IL Amber Glass with 1 Teflon-Lined Cap | I All Radionuclides except | the following HNO3 or HCI pH <2 1 year IL Plastic or Glass 1 1 Radon 222 none 4 days 30 mL Glass with Teflon-Lined 1 Septum 1 1 Cesium HCI to pH <2 1 year 1 L Plastic or Glass | 1 Iodine none 7 days IL Plastic or Glass | | Tritium none 1 year 1 L Plastic or Glass | ------- RESOURCES The following manuals are available from NTIS: Organic Methods Manuals ¦ Methods for the Determination of Organic Com- pounds in Drinking Water (EPA/600/4-88/039, NTIS# PB-91-231480/AS, Cost $43.00). This is the latest revision, dated July 1991. It includes EPA methods 502.1,502.2,503.1,504,505,507,508,508A, 515.1, 524.1, 524.2, 525.1, and 531.1. ¦ Methods for the Determination of Organic Com- pounds in Drinking Water, Supplement I (EPA/600/4-90/020, NITS# PB-91-146027, Cost $35.00). Includes EPAmethods 506,513,547,548,549, 550, 550.1, 551, and 552. All quality control is built into each method, each of which is in a standardized format. The EPA's Office of Research and Development Electronic Bulletin Board (ORD BBS) This free bulletin board provides information on meth- ods, research progress, Federal Register citations, EMSL-CI QA materials, environmental publications, and meetings. A communications software program (such as Crosstalk) and a computer modem are necessary to use the system. The Bulletin Board telephone numbers are: 513-569-7610 (1200 and 2400 baud) 800-258-9605 (9600 baud) 513-569-7700 (9600 baud) For information, call Charles Guion at 513-569-7644. The BBS currently contains a complete list of all the whole- sale and retail distributers of EPA-certified quality control samples. It also contains a list of other bulletin boards and environmentally related information sources. The Safe Drinking Water Hotline The Hotline updates and interprets information on EPA regulations and policies, locates technical publications and guidance documents, and recommends sources of public education and information materials. It can also provide the name of your state certification officer, from whom you can obtain the name of a laboratory in your area that is certified to test for drinking water parameters. The Hotline is available Monday through Friday, 8:30 a.m. to 5:00 p.m. EST (excluding federal holidays). Call 1-800-426-4791 (in the United States, Puerto Rico, and the Virgin Islands). Drinking Water Laboratory Workshop A Drinking Water Laboratory Certification Workshop is scheduled in conjunction with the AWWA/WQTC (TC3) in Buffalo, NY on November 19-20. This two-day workshop provides information on the Drinking Water Regulations, analytical methodologies, and State certification programs. For registration information contact AWWAat 303-794-7711. Rule Clarification (Continued from page 1) contaminant must be at least one-fifth of the MCL to allow compositing of five samples. The composited sample is made of an equal volume from each individual sample. The final volume of sample must be adequate for the method used. If a contaminant listed in any Rule is detected, then a sample from each sampling site included in the composite must be analyzed. If the samples used to make up the composite sample were collectedinduplicate and the hold- ing time listed in the method has not been exceeded, then the duplicate samples may be analyzed and resampling is not required. The data must be reported to the state within 14 days of sample collection. (See Federal Register/VcA. 57, No. 138/Friday, July 17,1992 p. 31841.) IOCs For inorganics regulated in the Phase II and V Rules, the MDLs listed in the Rules are for information only. The total number of samples may, upon state approval, be reduced through compositing if the detection limit achieved in the laboratory is less than one-fifth of the MCL. Compositing of the samples must be done in the laboratory. The compo- sited sample must be made of an equal volume from each individual sample. Hie final volume of sample must be adequate for the method used. If the concentration of a detected contaminant in the composite sample is greater than or equal to one-fifth of the MCL of any inorganic chemical in any Rule, an individual sample from each sampling site must be analyzed. If the samples used to make up the composite sample were col- lected in duplicate or sufficient volume of the initial sample remains and the holding time listed in the method has not been exceeded, then this part of the sample may be analyzed, and resampling is not necessary. The follow-up samples must be analyzed for all analytes detected and reported to the state within 14 days of sample collection. (See Federal RegisterfWol. 57, No. 138/Friday, July 17, 1992p. 31838.) Additional information may be obtained by reading the Federal Register notices. ~ u.S. GOVERNMENT HUNTING OFFICE: l*»3 - 7S0-M2/MM* ------- Update on Phase II The MCLs for aldicart), aldicarb sulfoxide, and aldicarb sulfone have been stayed, effective May 27, 1992. This means that the effective date of the MCLs and MCLGs has been postponed, pending review and reconsideration; however, monitoring for and reporting of occurrence data for these pesticides to the minimum detection limits is still required. Parts, of the Phase II rule were undergoing litigation. The Rule was upheld by a three-member panel of judges (August 1992). Phase V )hase V was signed on May 19, 1992. It was printed in the Federal Register on July 17. The full citation is: "Federal Register: U.S. Envi- ronmental Protection Agency. National Primary Drinking Water Regulations - Synthetic Organic Chemicals and Inorganic Chemicals; Final Rule. Volume 57, Number 193, Friday, July 17,1992 - Part III. [57 FR 31847]." The rule: 1. Set MCLs for antimony, beryllium, nickel, thallium, and cyanide. 2. Deferred the sulfate MCL until a later date. 3. Added three VOCs dichloromethane, 1,2,4-trichlorobenzene, and 1,1,2-trichlo- roethane. 4. Added seven pesticides dalapon, dinoseb, diquat, endothall, glyphosate, oxamyl, pi- cloram, and simazine. (Note that several of the pesticide methods are single analyte methods.) 5. Added six other organic contaminants. They are benzo(a)pyrene, di(2-ethyl- hexyl)adipate, di(2-ethylhexyl)phthalate, hexachlorobenzene, hexachlorocyclopen- tadiene, and 2,3,7,8-TCDD (dioxin). 6. Repromulgated the MCL for endrin at 0.002 mg/L (from 0.0002 mg/L) effective August 17, 1992. Phase V makes use of the standardized monitoring framework, reducing the complexity of the monitor- ing requirements by coordinating the monitoring re- quirements among regulations and synchronizing the monitoring schedules. Although the rule is not effective until January 17, 1994, monitoring for the contaminants in the Phase V Rule starts on January 1, 1993. Analytical methods cited in the Rule are effective August 17,1992. TTHM/VOC Certification The requirement that a laboratory must be certified for the TTHMs to be certified for VOCs has been revised. The revision is contained on pp. 612,613,614 of the 40 CFR Ch. 1 (7-1-91 Edition). This requirement no longer exists in Part 141.24 (17) (i). United States Bulk Rate Environmental Protection OGWDW-TSD Postage &Fees Pa* Agency Cincinnati, OH 45268 Permitno. G-35 Official Business, Penalty for Private Use $300 U.S. EPA Region III Regional Center for Environmental Information 1650 Arch Street (3PM52) Philadelphia, PA 19103 4 ------- |