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Thatcher Company of California, Inc., Stockton <br /> Sample #(s): TCS-05 Primary Sampler Assistant sampler <br /> Date and Approx. Time Collected: 3:25 pm — 3:50 Dylan Clark Bonny Lew <br /> pm (slow drip from leaking pipe into sample container) <br /> Photographer Documenter Other sampling assists <br /> Bonny Lew Anne Ekker Xiaomei Ma <br /> i <br /> Primary Sampler: ® Inner Gloves ® Outer Gloves ® Suit Kleenquard <br /> ❑ Respirator type Level D <br /> Sample Container Used: <br /> Glass Jars: 16-ounce jar <br /> Other sample container used: N/A <br /> ❑ Co-located sample(s) collected for facility <br /> Sample device used: ❑ Plastic Scoops ❑ COLIWASA ❑ Pond Skimmer ❑ Gloved hand <br /> ® Direct pour into sample container ❑ Other sample devices used (specify): <br /> Sample location description: The sample was collected in the Bleach Filter Waste/Containment #2 Tank <br /> Farm Area from a leaking pipe near a large blue tank labeled "Sodium Hypochlorite". This area is just north <br /> of the Acid Storage Area. GPS Coordinates of sample location: longitude: -121.261741; latitude: <br /> 37.908633 (see Attachment 1, Sample Location Map). <br /> Sample Information/Field Observations: <br /> The sample was collected from a leaking pipe of sodium hypochlorite product solution, and was a clear, <br /> light yellow liquid. <br /> Field Observations: A sign posted in the area said: "Process Make Up Water (containing 1-12% bleach) <br /> Pumped Back for Reprocessing". <br /> Field testing and other pertinent info: a pH strip used to measure the water showed a pH of approximately <br /> 13-14. <br /> Analysis for sample location: ❑ total metals ❑ soluble metals ❑ TCLP ❑ mercury ❑ Chrom 6 ❑ <br /> PCBs ® pH ❑ flash pt ® fish bioassay ❑ asbestos ❑ motor oil range ❑ diesel range <br /> ❑ total petroleum hydrocarbons ❑ VOCs ❑ Semivol ❑ < 100 micron size ❑ other(specify): <br /> Photos: See Attachment 4, Photo #'s: 15-17 and 25-28 <br /> i <br /> Page 7 of 12 <br />