PURPOSE: This rule establishes required analyses must be done by laboratories certified by the department.

1. (1) For the purpose of determining compliance with this chapter, analytical results will be acceptable only if the samples have been analyzed by a laboratory certified by the department.

2. (2) To receive approval to conduct analyses for antimony, asbestos, barium, beryllium, cadmium, chromium, cyanide, fluoride, mercury, nickel, nitrate, nitrite, selenium, and thallium the laboratory must— 1 pCi/l 3 pCi/l 1000 pCi/l 10 pCi/l 2 pCi/l 1 pCi/l 10 pCi/l 4 pCi/l 1/10 of the acceptable limit

   and

   that

1. (A) Analyze performance evaluation samples which include those substances provided by the Environmental Protection Agency

2. (EPA) Environmental Monitoring and Support Laboratory or equivalent samples provided by the department; and

   1. (B) Achieve quantitative results on the analyses that are within the following acceptance limits:

Contaminant

Antimony Asbestos

Barium Beryllium Cadmium Chromium Copper Fluoride Lead Mercury Nickel Nitrate Nitrite Selenium Thallium

1. (3) To receive certification to conduct analyses for the contaminants in 10 CSR 60- 4.100(2)(A)2.–7. and (B)1.–13., the laboratory must—

   1. (A) Analyze performance evaluation samples which include these substances provided by EPA Environmental Monitoring and Support Laboratory or equivalent samples provided by the department;
   2. (B) Achieve the quantitative acceptance limits in subsections (3)(C) and (D) of this rule for at least eighty percent (80%) of the regulated organic chemicals listed in 10 CSR 60-4.100(2)(A)2.–7. and (B)1.–13.;
   3. (C) Achieve the quantitative results on the analyses performed under subsection (3)(A) of this rule that are within plus or minus twenty percent (±20%) of the actual amount of the substances in the performance evaluation sample when the actual amount is greater than or equal to 0.010 mg/l;
   4. (D) Achieve quantitative results on the analyses performed under subsection (3)(A) of this rule that are within plus or minus forty percent (±40%) of the actual amount of the substances in the performance evaluation sample when the actual amount is less than 0.010 mg/l; and
   5. (E) Achieve a method detection limit of 0.0005 mg/l. Acceptance Limit

±30% at (cid:2)0.006 mg/l 2 standard deviations based on study statistics ±15% at (cid:2)0.15 mg/l ±15% at (cid:2)0.001 mg/l ±20% at (cid:2)0.002 mg/l ±15% at (cid:2)0.01 mg/l ±10% at (cid:2)0.50 mg/l ±10% at (cid:2) to 10 mg/l ±30% at (cid:2)0.005 mg/l ±30% at (cid:2)0.0005 mg/l ±15% at (cid:2)0.01 mg/l ±10% at (cid:2)0.4 mg/l ±15% at (cid:2)0.4 mg/l ±20% at (cid:2) 0.01 mg/l ±30% at (cid:2) 0.002 mg/l (4) To receive certification for vinyl chloride, the laboratory must—

1. (A) Analyze performance evaluation samples provided by EPA Environmental Monitoring and Support Laboratory or equivalent samples provided by the department;
2. (B) Achieve quantitative results on the analyses performed under subsection (4)(A) of this rule that are within plus or minus forty percent (±40%) of the actual amount of vinyl chloride in the performance evaluation sample;
3. (C) Achieve a method detection limit of 0.0005 mg/l; and
4. (D) Obtain certification for the contaminants listed in 10 CSR 60-4.100(2)(A)2.–7. and (B)1.–13.

1. (5) To receive certification to conduct analyses for the contaminants in 10 CSR 60- 4.040(1), the laboratory must—

   1. (A) Analyze performance evaluation samples which include those substances provided by EPA Environmental Monitoring and Support Laboratory or equivalent samples provided by the department.

   2. (B) Achieve quantitative results on the analyses that are within the following acceptance limits:

      Acceptance

Contaminant

2,3,7,8-TCDD (Dioxin) 2,4-D 2,4,5-TP Alachlor Aldicarb

Aldicarb sulfoxide

Aldicarb sulfone

Atrazine Benzo(a)pyrene

Carbofuran Chlordane Dalapon

Dibromochloropropane Di(2-ethylhexyl)adipate

Di(2-ethylhexyl)phthalate

Dinoseb

Diquat

Endothall

Endrin 10 CSR 60-5

Ethylene dibromide ±40 Glyphosate 2 standard deviations Heptachlor ±45 Heptachlor epoxide ±45 Hexachlorobenzene 2 standard deviations Hexachlorocyclopentadiene 2 standard deviations Lindane ±45 Methoxychlor ±45 Oxamyl 2 standard deviations Polychlorinated biphenyls (PCBs) (as decachlorobiphenyl) 0—200 Picloram 2 standard deviations Simazine 2 standard deviations Toxaphene ±45 Pentachlorophenol ±50

1. (6) To receive approval to conduct analyses for copper and lead, the laboratory must—

   1. (A) Analyze performance evaluation samples which include those substances provided by EPA Environmental Monitoring and Support Laboratory or equivalent samples provided by the department;
   2. (B) Achieve quantitative acceptance limits

Limit for copper plus or minus ten percent (±10%) (percent) of the actual amount in the performance eval- 2 standard uation sample when the actual amount is ±50 greater than or equal to 0.050 mg/l; lead plus ±50 or minus thirty percent (±30%) of the actual ±45 amount in the performance evaluation sample 2 standard when the actual amount is greater than or deviations equal to 0.005 mg/l; and 2 standard

1. (C) Achieve a method detection limit of

deviations 0.001 mg/l. 2 standard deviations (7) Analysis for disinfection byproducts must be conducted by laboratories that have ±45 2 standard received certification by the department except that a party approved by the departdeviations ±45 ment must measure daily chlorite samples at the entrance to the distribution system. To ±45 2 standard receive certification to conduct analyses for the TTHM, HAA5, bromate and chlorite, the deviations ±40 laboratory must carry out annual analyses of 2 standard performance evaluation (PE) samples apdeviations proved by the department. In these analyses of PE samples, the laboratory must achieve 2 standard deviations quantitative results within the acceptance 2 standard limit on a minimum of eighty percent (80%) deviations of the analytes included in each PE sample. 2 standard The acceptance limit is defined as the ninetydeviations five percent (95%) confidence interval calcu- 2 standard lated around the mean of the PE study data deviations between a maximum and minimum accep- ±45 tance limit of plus or minus fifty percent (±50%) and plus or minus fifteen percent (±15%) of the study mean.

1. (8) The department has the authority to allow the use of previously collected monitoring data for purposes of monitoring, if the data were collected and analyzed in accordance with the requirements of this rule.
2. (9) All lead levels measured between the Practical Quantification Level (PQL) and Method Detection Limit (MDL) must be either reported as measured or they can be reported as one-half (1/2) the PQL (0.0025 mg/l). All levels below the lead MDL must be reported as zero (0).
3. (10) All copper levels measured between the PQL and the MDL must be either reported as measured or they can be reported as one-half (1/2) the PQL (0.015 mg/l). All levels below the copper MDL must be reported as zero (0).
4. (11) Operational monitoring measurements required by 10 CSR 60-4.080(3) shall be performed on-site by persons acceptable to the department.
5. (12) The department will consider acceptance of analytical results from out-of-state laboratories upon written request.

AUTHORITY: section 640.100, RSMo Supp. 1999.* Original rule filed May 4, 1979, effective Sept. 14, 1979. Rescinded and readopted: Filed March 31, 1992, effective Dec. 3, 1992. Amended: Filed Aug. 4, 1992, effective May 6, 1993. Amended: Filed May 4, 1993, effective Jan. 13, 1994. Amended: Filed Feb. 1, 1996, effective Oct. 30, 1996. Amended: Filed Dec. 15, 1999, effective Sept. 1, 2000.

*Original authority: 640.100, RSMo 1939, amended 1978, 1981, 1982, 1988, 1989, 1992, 1993, 1995, 1996, 1998, 1999.