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pEL-TECH OEL-TEGH <br /> DEL TECH GEOTECHNICAL SUPPORT SERVICES, INC. <br /> (209)232-7967 (OFFICE) cassandra@deltech1.com (EMAIL) <br /> INSTRUMENT CALIBRATION LOG 2026 <br /> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> PROJECT NAME: FORWARD LANDFILL PROJECT MANAGER: ARCADIS <br /> ADDRESS: 9999 S.AUSTIN ROAD SAMPLER: DEL TECH/MANUEL MORENO <br /> CITY,STATE: MANTECA,CA SIGNED: — <br /> SITE CONTACT: OSVALDO CORDERO SAMPLE MEDIA: GROUNDWATER <br /> CONSULTANT: ARCADIS MONTH: FIRST QUARTER 2026 <br /> CALIBRATION RECORDINGS <br /> CALIBRATION STANDARDS <br /> INSTRUMENT METER SERIAL Ph Ph Ph COND. TURBIDITY I TURBIDITY INSTRUMENT <br /> CALIBRATION # 4 7 10 1413 MHOS 20 1 100 CONDITION <br /> READING READING READING (CeLsios) (N.T.U.) I (N.T.U.) <br /> DATE 1/28/2026 6263328 4060018101 GOOD <br /> TIME <br /> 10:21 PRE-CALIBRATION 3.99 7.02 10.02 1410 20 100 <br /> CALIBRATION 4.00 7.00 10.00 1413 20 100 <br /> CAL.SUCCESSFUL(Y/N) YES YES YES YES YES YES <br /> SATIFIES PROTOCOL? YES YES YES YES YES YES <br /> CALIBRATED BY: M.M. M.M. M.M. M.M. M.M. I M.M. <br /> DATE 1/29/2026 6263328 4060018101 GOOD <br /> TIME <br /> 8:26 PRE-CALIBRATION 4.01 6.99 10.01 1412 20 100 <br /> CALIBRATION 4.00 7.00 10.00 1413 20 100 <br /> CAL.SUCCESSFUL(Y/N) YES YES YES YES YES YES <br /> SATIFIES PROTOCOL? YES YES YES YES YES YES <br /> CALIBRATED BY: � M.M. M.M. M.M. M.M. M.M. M.M. <br /> DATE 1/30/2026 6263328 4060018101 GOOD <br /> TIME <br /> 830 PRE-CALIBRATION 3.97 7.01 9.98 1409 20 100 <br /> CALIBRATION 4.00 7.00 10.00 1413 20 100 <br /> CAL.SUCCESSFUL(Y/N) YES YES YES YES YES YES <br /> SATIFIES PROTOCOL? YES YES YES YES YES YES <br /> CALIBRATED BY: — M.M. b1.M. M.M. M.M. M.M. I M.M. <br /> DATE 2/2/2026 6263328 4060018101 GOOD <br /> TIME <br /> 9:30 PRE-CALIBRATION 3.91 6.96 9.96 1412 20 100 <br /> CALIBRATION 4.00 7.00 10.00 1413 20 100 <br /> CAL.SUCCESSFUL(Y/N) YES YES YES YES YES YES <br /> SATIFIES PROTOCOL? YES YES YES YES YES YES <br /> CALIBRATED BY: -t--' M.M. M.M. M.M. M.M. M.M. I M.M. <br /> DATE 2/3/2026 6263328 4060018101 GOOD <br /> TIME <br /> 8:15 PRE-CALIBRATION 3.94 ('9- 10M 1409 20 100 <br /> CALIBRATION 4.00 7.00 10.00 1413 10 100 <br /> CAL.SUCCESSFUL(Y/N) YES YES YES YI s 1'F.S YES <br /> SATIFIES PROTOCOL? YES YES YES YES YES YES <br /> CALIBRATED BY: } M.M. M.M. M.M. M.M. M.M. I M.M. <br /> * NOTE: UPON COMPLETING THE INITIAL READINGS OF THE INSTRUMENT,WE WILL ALWAYS ADJUST TO THE <br /> INSTRUMENT TO THE CALIBRATION STANDARD SOLUTION THAT IS BEING USED AT THAT TIME AND AT THE <br /> CURRENT AMBIENT TEMPERATURE. <br />