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Water System Detail Information

Water System No.:

AZ0407095

Federal Type:

C

Water System Name:

MESA CITY OF

Primary Source:

SW

Principal County Served:

MARICOPA

System Status:

A

Comments:

Activity Date:

1977-06-01


Analyte
Code		 Analyte
Name		 Sample
Type		 Sample
No.		 Date Sample
Point		 Sample
Result		 Sample
UOM		 Sample
Less Than
Indicator		 Detection Limit MCL Laboratory
1038 NITRATE-NITRITE RT 23090046 2023-09-05 EPDS203 3.39792 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 23040110 2023-04-05 EPDS126 0.21763 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 22030476 2022-03-16 EPDS205 3.2676 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 22020043 2022-02-02 EPDS106 1.04826 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 22010182 2022-01-06 EPDS302 5.93108 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 22010028 2022-01-03 EPDS301 2.05537 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21100486 2021-11-18 EPDS126 1.79861 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21110228 2021-11-09 EPDS304 1.21518 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21100390 2021-10-19 EPDS103 1.6 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21100252 2021-10-12 EPDS112 5.6 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21090724 2021-09-28 EPDS117 1.2 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21090126 2021-09-08 EPDS111 4.4 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21070541 2021-07-20 EPDS312 2.2 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21060334 2021-06-16 EPDS110 0.56 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21060151 2021-06-07 EPDS317 1.6 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21060152 2021-06-07 EPDS303 0.43 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21050334 2021-05-06 EPDS203 3.25675 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21040200 2021-04-15 EPDS109 3.24941 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21030258 2021-03-04 EPDS316 1.52054 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21020193 2021-02-10 EPDS113 4.15731 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21020031 2021-02-02 EPDS115 2.20773 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 21010394 2021-01-11 EPDS317 1.63863 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 20030004 2020-03-02 EPDS137 4.35428 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 20030006 2020-03-02 EPDS138 3.45277 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 16060165I 2016-06-08 EPDS317 1.55 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 15070448 2015-07-21 EPDS131 3 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 15070391 2015-07-20 EPDS119 0.314 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 15070119I 2015-07-07 EPDS321 1.33 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 2012112001155I 2012-11-20 EPDS001 0.23 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201209270445I 2012-09-27 EPDS312 0.96 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 12070781 2012-08-28 EPDS313 0.85 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 12070785 2012-08-28 EPDS317 1.57 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 12070772 2012-08-27 EPDS126 0.33 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 12070777 2012-08-27 EPDS303 1.48 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 12070779 2012-08-27 EPDS311 0.87 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 12070778 2012-08-22 EPDS304 1.26 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 12070783 2012-08-22 EPDS315 2.69 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 12070786 2012-08-22 EPDS321 1.04 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208150501I 2012-08-15 EPDS106 1.2 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208150502I 2012-08-15 EPDS111 3.8 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208150503I 2012-08-15 EPDS119 0.30 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208140227I 2012-08-14 EPDS104 0.42 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208140228I 2012-08-14 EPDS109 3.7 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208140229I 2012-08-14 EPDS115 2.2 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208130183I 2012-08-13 EPDS103 3.5 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208130184I 2012-08-13 EPDS110 0.52 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208130185I 2012-08-13 EPDS113 3.9 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208080563I 2012-08-08 EPDS205 2.6 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208080564I 2012-08-08 EPDS322 1.4 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208080565I 2012-08-08 EPDS316 1.2 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 201208070367I 2012-08-07 EPDS301 1.4 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208060115I 2012-08-06 EPDS203 3.0 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201208060116I 2012-08-06 EPDS302 2.2 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 201208060117I 2012-08-06 EPDS306 0.80 MG/L 10 MG/L EUROFINS EATON ANALYTICAL INC
1038 NITRATE-NITRITE RT 201205080126I 2012-05-08 EPDS117 2.9 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 201205070059I 2012-05-07 EPDS102 2.5 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 201205070067I 2012-05-07 EPDS107 0.87 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 201204160112I 2012-04-16 EPDS112 6.6 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 11110459I 2011-11-14 EPDS321 0.17 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 10110646 2010-11-22 EPDS317 1.59 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 201001110070I 2010-01-11 EPDS311 0.85 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2804170315I 2008-04-17 EPDS106 2.5 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601230109I 2006-01-23 EPDS306 0.81 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601170110I 2006-01-17 EPDS115 1.9 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601170112I 2006-01-17 EPDS119 0 MG/L < 0 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601170113I 2006-01-17 EPDS304 1.2 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601170114I 2006-01-16 EPDS117 1.8 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601110138I 2006-01-11 EPDS312 0.71 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601110141I 2006-01-11 EPDS315 2.1 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601110142I 2006-01-11 EPDS108 2 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601110143I 2006-01-11 EPDS109 1.6 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601110144I 2006-01-11 EPDS112 3.8 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601100115I 2006-01-10 EPDS302 1.6 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601100118I 2006-01-10 EPDS303 1.4 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601100120I 2006-01-10 EPDS104 0.58 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601100122I 2006-01-10 EPDS105 2.3 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601100124I 2006-01-10 EPDS107 0.58 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601090108I 2006-01-09 EPDS205 2.1 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601090120I 2006-01-09 EPDS301 2.8 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601090123I 2006-01-09 EPDS313 0.9 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601090127I 2006-01-09 EPDS101 3.5 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601050090I 2006-01-05 EPDS401 1.6 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601050094I 2006-01-05 EPDS404 1.5 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601050095I 2006-01-05 EPDS405 1.6 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601050096I 2006-01-05 EPDS106 1.8 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601050097I 2006-01-05 EPDS116 4.4 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601050098I 2006-01-05 EPDS001 0 MG/L < 0 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040178I 2006-01-04 EPDS203 2.9 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040188I 2006-01-04 EPDS204 4.3 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040189I 2006-01-04 EPDS102 1.3 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040190I 2006-01-04 EPDS103 1.4 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040191I 2006-01-04 EPDS311 0.82 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040158I 2006-01-03 EPDS110 0.56 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040159I 2006-01-03 EPDS111 2.3 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040160I 2006-01-03 EPDS113 3.5 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040161I 2006-01-03 EPDS126 0 MG/L < 0 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2601040162I 2006-01-03 XEPDS202 2.2 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 05110145 2005-11-22 EPDS001 0.31 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 0404W198 2004-04-27 EPDS001 0.26 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 2306110027 2003-06-11 EPDS401 3.8 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 230507008I 2003-05-07 EPDS116 6.8 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2304090148I 2003-04-09 EPDS112 3.3 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 0112W-005 2001-12-18 EPDS001 0.12 MG/L 10 MG/L MESA CITY OF COMPLIANCE LAB
1038 NITRATE-NITRITE RT 2111080098I 2001-11-06 EPDS115 2.1 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2111080106I 2001-11-06 EPDS303 1.3 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2111080107I 2001-11-06 EPDS313 1.6 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2111080108I 2001-11-06 EPDS306 0.86 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2111080109I 2001-11-06 EPDS315 1 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 2111080111I 2001-11-06 EPDS405 0.86 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 010906965001I 2001-09-19 EPDS001 0 < .1 MG/L 10 MG/L LEGEND TECHNICAL SERV OF AZ PHX LAB
1038 NITRATE-NITRITE RT 010604369001I 2001-06-14 EPDS001 0.1 MG/L 10 MG/L LEGEND TECHNICAL SERV OF AZ PHX LAB
1038 NITRATE-NITRITE RT 010302164001I 2001-03-26 EPDS001 0.2 MG/L 10 MG/L LEGEND TECHNICAL SERV OF AZ PHX LAB
1038 NITRATE-NITRITE RT 2102060026 2001-02-05 EPDS401 4 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 60697801 1996-06-28 XEPDS202 .84 MG/L 10 MG/L AMERICAN ENVIRONMENTAL NETWORK
1038 NITRATE-NITRITE RT 60480101 1996-04-18 EPDS306 .96 MG/L 10 MG/L AMERICAN ENVIRONMENTAL NETWORK
1038 NITRATE-NITRITE RT 60480201 1996-04-18 EPDS118 .44 MG/L 10 MG/L AMERICAN ENVIRONMENTAL NETWORK
1038 NITRATE-NITRITE RT 10-96-108954 1996-04-12 EPDS110 .12 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108950 1996-04-10 EPDS102 .72 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108951 1996-04-10 EPDS105 1.03 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108952 1996-04-10 EPDS107 .37 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108953 1996-04-10 EPDS108 .37 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108955 1996-04-10 EPDS109 .47 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108956 1996-04-10 EPDS112 1.39 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108957 1996-04-10 EPDS117 .56 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108958 1996-04-10 EPDS113 1.48 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-108959 1996-04-10 EPDS103 .48 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT BB-00716 1996-02-12 EPDS203 2.35 MG/L 10 MG/L AQUATIC CONSULTING TESTING
1038 NITRATE-NITRITE RT 10-96-103300 1996-02-07 EPDS114 .21 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103303 1996-02-07 EPDS402 1.68 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103305 1996-02-07 EPDS301 2.55 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103297 1996-02-06 EPDS101 3.27 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103298 1996-02-06 EPDS106 .71 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103299 1996-02-06 EPDS111 2.76 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103301 1996-02-06 EPDS115 .14 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103302 1996-02-06 EPDS116 1.5 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103308 1996-02-06 EPDS304 1.19 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103311 1996-02-06 EPDS205 2.34 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT BB-00715 1996-02-06 EPDS404 1.98 MG/L 10 MG/L AQUATIC CONSULTING TESTING
1038 NITRATE-NITRITE RT 10-96-103304 1996-02-05 EPDS405 1.58 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103306 1996-02-05 EPDS302 1.4 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103307 1996-02-05 EPDS303 1.3 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103309 1996-02-05 EPDS305 3.21 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 10-96-103310 1996-02-05 EPDS204 2.61 MG/L 10 MG/L AQUA TECH ENVIRONMENTAL LABS INC
1038 NITRATE-NITRITE RT 9512-09082-1 I 1995-12-19 EPDS001 .133 MG/L 10 MG/L LEGEND TECHNICAL SERV OF AZ PHX LAB
1038 NITRATE-NITRITE RT 940126128I 1994-01-25 EPDS203 .9 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 940126129I 1994-01-25 EPDS101 3.2 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 940126130I 1994-01-25 EPDS104 2.2 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 940126131I 1994-01-25 EPDS105 2.4 MG/L 10 MG/L MWH LABS INC
1038 NITRATE-NITRITE RT 940126132I 1994-01-25 EPDS103 null < 2.7 MG/L 10 MG/L MWH LABS INC