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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 2/4/2026 6263328 4060018101 GOOD <br /> TIME <br /> 8:28 PRE-CALIBRATION 3.99 7.02 10.03 1411 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 2/5/2026 6263328 4060018101 GOOD <br /> TIME <br /> 8:58 PRE-CALIBRATION 3.97 7.01 9.98 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. M.M. <br /> DATE 2/6/2026 6263328 4060031101 GOOD <br /> TIME <br /> 920 PRE-CALIBRATION 3.99 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. b1.M. M.M. M.M. M.M. I M.M. <br /> DATE 2/9/2026 6263328 4060031101 GOOD <br /> TIME <br /> 10:15 PRE-CALIBRATION 3.95 6.97 9.99 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: -t--'[ M.M. M.M. M.M. M.M. M.M. M.M. <br /> DATE 2/10/2026 6263328 4060031101 GOOD <br /> TIME <br /> 9:50 PRE-CALIBRATION 3.99 7.07 10M 1411 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 /> r..[ <br /> CALIBRATED BY: - _t_ M.M. M.M. M.M. M.M. M.M. 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 />