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==- ENVIRONMENTAL <br /> Analytical Chemists <br /> February 13, 1998 INORGANIC Quality Assurance Report for sample: 830410 <br /> Luhdorff & Scalmanini, Consulting Eng. <br /> 500 First Street <br /> Woodland CA 95695 <br /> BATCH BLANK QA/QC CALIBRATION QA/QC METHOD QA/QC { <br /> Constituent ID Method Units DLR Result NOTE Type Conc. % REC AR NOTE Type Conc. % REC % REC AR % DIF MAV NOTE. <br /> Calcium 20 2A 200.7 mg/L 1.0 ND CCV 50.0 101 90-110 MS 25.0 98.6 94.7 75-125 1.1 20.0 <br /> Magnesium 2D 2A 200.7 mg/L 1-0 ND CCV 50.0 101 90-110 MS 25.0 99.9 97.5 75-125 1.3 20.0 <br /> Potassium 20 2A 200.7 mg/L 1.0 NO CCV 50.0 97.5 90-110 MS 25.0 98.0 98.4 75-125 0.3 20.0 <br /> Sodium 21) 2A 200.7 mg/L 1.0 ND CCV 50-0 100 90-110 Ms 25.0 100 94.9 75-125 1.4 20.0 <br /> Boron 2D 2A 200.7 mg/L 0.10 NO CCV 2.00 103 90-110 MS 2.50 99.6 97.4 75-125 1.6 20.0 <br /> Copper 2D 2A 200.7 ug/L 50 ND CCV 2000 102 90-110 M5 500 98.1 96.7 75-125 1-2 20.0 <br /> Iron 2D 2A 200.7 ug/L' 50 ND CCV 2000 103 90-110 MS 2500 93.8 62.6 75-125 1.6 20.0 410 <br /> Manganese 2D 2A 200.7 ug/L 30 ND CCV 1000 102 90-110 MS 500 96.9 91.1 75-125 1.4 20.0 <br /> Zinc 2D 2A 200.7 ug/L 50 NO CCU 1000 102 90-110 MS 500 101 99.1 75-125 1.4 20.0 <br /> Total Alkalinity 2A 2A 23208 mg/L N/A CCV 236 102 90-110 Dup 187 N/A N/A NIA 0.7 6.5 <br /> Hydroxide 2A 2A 2320E mg/L N/A NIA Dup 0.000 N/A N/A N/A 0.0 20.0 <br /> Carbonate 2A 2A 2320B mg/L N/A N/A Dup 0.000 N/A N/A N/A 0.0 20.0 <br /> Bicarbonate 2A 2A 2320B mg/L N/A N/A Dup 228 N/A N/A N/A 0.7 6.5 <br /> Sulfate OA 2A 300.0 mg/L 1.0 ND CCV 100 104 90-110 Ms 300 96.1 94.8 80-120 0.9 20.0 <br /> OA 2B 300.0 mg/L 1.0 ND CCV 100 105 90-110 MS 300 91.2 96.5 80-120 4.5 20.0 - <br /> 7A 2C 300.0 mg/L 1.0 ND CCV 100 103 90-110 MS 300 96.9 97.3 80-120 0.4 . 20.0 <br /> Chloride OA 2A 300.0 mg/L 1.0 NO CCV 50.0 102 90-110 MS 400 103 102 86-106 0.6 4.2 <br /> OA 2B 300.0 mg/L 1.0 0.3 CCV 50.0 102 90-110 MS 400 105 106 86-106 0.4 4.2 <br /> 7A 2C 300.0 mg/L 1.0 ND CCV 50.0 103 90-110 MS 400 106 106 86-106 0.5 4.2 <br /> Nitrate OA 2A 300.0 mg/L 0.40 ND CCV 40.0 102 90-110 MS 440 107 106 88-113 1.2 4.1 <br /> OA 2B 300.0 mg/L 0.40 NO CCV 40.0 103 90-110 MS 440 106 106 88-113 0.2 4.1 <br /> F61- ID = 19980128 ND => Not Detected at ar above DLR. DLR => Detection Limit for Reporting purposes. N/A => Not Applicable NOTE => See note indicated below. <br /> Table continued next page . . . . . <br /> Corporate O Office&Laboratory Field Office <br /> P.O.Dox 2721 853 Corporation Street 2500 Stagecoach Road Visalia,California <br /> Santa Paula,CA 93061-0272 Stockton,CA 95215 TEL:(209)734-9473 <br /> TEL: (805)659.0910 TEL: (209)942.0181 Mobile:(209)737-2399 <br /> FAX: (8051525-4172 FAX: (209)942.0423 FAX:(2nd)7,34-A4'15 <br />