PURPOSE: This rule establishes that 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. (A) Analyze performance evaluation samples which include those substances provided by the Environmental Protection Agency

3. (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 $0.006 mg/l 2 standard deviations based on study statistics ±15% at $0.15 mg/l ±15% at $0.001 mg/l ±20% at $0.002 mg/l ±15% at $0.01 mg/l ±10% at $0.50 mg/l ±10% at $ to 10 mg/l ±30% at $0.005 mg/l ±30% at $0.0005 mg/l ±15% at $0.01 mg/l ±10% at $0.4 mg/l ±15% at $0.4 mg/l ±20% at $ 0.01 mg/l ±30% at $ 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 Ethylene dibromide Glyphosate

Heptachlor Heptachlor epoxide Hexachlorobenzene

Hexachlorocyclopentadiene

Lindane Methoxychlor Oxamyl

Polychlorinated biphenyls (PCBs) (as decachlorobiphenyl) Picloram

Simazine

Toxaphene Pentachlorophenol

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

Limit provided by the department; (percent)

1. (B) Achieve quantitative acceptance limits

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

1. (C) Achieve a method detection limit of

±45 0.001 mg/l. 2 standard deviations

1. (7) Analysis for disinfection byproducts must

±45 be conducted by laboratories that have ±45 received certification by the department 2 standard except that a party approved by the departdeviations ±40 ment must measure daily chlorite samples at 2 standard the entrance to the distribution system. To deviations receive certification to conduct analyses for 2 standard the TTHM, HAA5, bromate and chlorite, the deviations laboratory must carry out annual analyses of 2 standard performance evaluation (PE) samples apdeviations proved by the department. In these analyses 2 standard of PE samples, the laboratory must achieve deviations quantitative results within the acceptance 2 standard limit on a minimum of eighty percent (80%) deviations ±45 of the analytes included in each PE sample. ±40 2 standard deviations ±45 ±45 2 standard deviations 2 standard deviations ±45 ±45 2 standard deviations

0—200 2 standard deviations 2 standard deviations ±45 ±50 The acceptance limit is defined as the ninetyfive percent (95%) confidence interval calculated around the mean of the PE study data between a maximum and minimum acceptance 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.