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Section 2.0 Salo phing 2.1 Sample Collection Procedures The rinse water is tested for pH with an Oakton PH FM I continuous monitor by Premier's wastewater treatment operator. Any waste, including process water, rinse water,_pressure wash wastewater and the filter cake which can potentially exhibit the characteristic of corrosivity and/or toxicity because of California regulated metals, and cannot be treated on-site will be sampled by Shop Hazard Solutions. Shop Hazard Solutions will collect and manage samples in accordance with SW-846 procedures. Samples for the process water,rinse water and pressure wash wastewater will be collected directly from the respective tank with the use of a coliwasa sampler(or equivalent means), a representative sample will be collected of the filter cake once the cake is removed from the filter process. 2.2 Test Methods Samples collected by Shop Hazard Solutions will be submitted to Castle Analytical Laboratory (ELAP Certification 92480) in accordance with the applicable holding times and conditions. The following table identifies the test methods used to characterize aqueous waste (process wastewater &rinse water) and filter cake analysis: Aqueous Waste CAM-17 Metals 3010A & 7470A (Mercury) pH SM4500 Filter Cake CAM-17 Metals 6020 Analytical reports for waste determination are included as Attachment H. 2.3 Sampling Frequency Rinse water and filter cake waste will be re-sampled when a new product is used on the plating line or there is a change to the plating process which could impact the characteristic of either of these waste streams. Process wastewater will be sampled prior to disposal (typically the process wastewater is rarely, if ever changed out). Analytical records will be maintained on-site for a minimum of three years from the date any of these waste streams are sent off-site for disposal in accordance with Title 22 CCR 66262.40(c). + Pren er Finishing YYaste Analysis Plan 4