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Zone 7 - Hansen Park Test Well <br />Mass Balance Analysis <br />June 3, 2025 <br />Sample Sample Zone Sample Flowrate Measured Concentration Calculated Concentration Measured <br />Zone Depth Depth (GPM) As Cr6+ Mn As Cr6+ Mn PFHxS Spec. Cond. <br />(feet) (feet) mg/L µg /L mg/L mg/L µg/L mg/L µg /L µmhos/cm <br />1 298 to 318 Surface 92 0.00089 4.200 0.063 0.00034 5.8500 0.1565 2.7300 930 <br />2 458 to 518 448 293 0.00099 3.900 0.046 0.00069 4.6270 0.0133 2.7000 933 <br />3 518 to 578 518 121 0.00140 2.900 0.091 0.00110 4.1165 0.0385 0.0000 773 <br />4 602 to 628 598 25 0.00180 1.300 0.160 0.00207 1.8360 0.0528 0.0000 665 <br />5 656 to 676 646 31 0.00170 1.100 0.200 0.00270 2.2822 0.1535 0.0000 693 <br />6 736 to 756 726 36 0.00084 0.082 0.240 0.00084 0.0820 0.2400 2.5300 894 <br />Calculated Concentration Calculated Concentration <br />0.000 <br />298 to 318 <br />458 to 518 <br />518 to 578 <br />602 to 628 <br />656 to 676 0. <br />\. <br />0.00 <br />736 to 756 0.00 <br />0.00 <br />800.919.7555 <br />909.625.6262 <br />0.001 <br />1.00 <br />Database File <br />Dataset Pathname <br />Presentation Format <br />Dataset Creation <br />Charted by <br />As (mg/L) and Cr6+ (µg/L) <br />As (mg/L) <br />0.001 0.002 0.002 0.003 0.003 0.000 0.050 <br />5.85 <br />I <br />4.63 I I ■0.0133 I <br />4.12 ■As Cr6+ I <br />I <br />0.00110 MCL <br />-+85 As = 0.01 mg/L 3 Cr6+ = 10 µg/L <br />0.00207 <br />....,"°�'2.28 <br />0.00084 <br />2.00 3.00 4.00 <br />cr6+ (µg/L) <br />33555.db <br />33555_fldgpm <br />spinmerg <br />5.00 <br />0.00270 <br />6.00 7.00 <br />1785 w. arrow rte., bldg. d, ste 3,4 <br />upland, ca 91786 <br />www.pacificsurveys.com <br />Wed Jul 02 11 :47:39 2025 Imported depthlog <br />Depth in Feet scaled 1 :240 <br />Mn (mg/L) <br />Mn (mg/L) <br />0.100 0.150 0.200 0.250 0.300 <br />0.1565 <br />■Mn <br />MCL <br />0.2400 <br />fax: 909.399.3180 <br />GPM Delta GPM 0 Fluid Velocity (ft/min) 300 Fluid Velocity <br />(ft/min) ---------------+----------------------------------------------- <br />,:,.,J,J <br />f------+--233_-+------I <br />f------+--232--+------1 <br />f------+--231 --+---I <br />f------+--230--+------1 <br />f------+--228_-+------I <br />f------+--227--+------1 <br />f------+--227_-+------I <br />f------+--230--+------1 <br />f------+--244_-+------I <br />f------+--261 --+---I <br />f------+--263_-+------I <br />"Tl C <br />r 0 <br />I <br />I l <br />,:,.;Ju <br />300 <br />0 GPM 800 <br />GPM