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J DISCUSSION As shown in Tables I and ll, the results were compared to the Total Threshold Limit Concentration (TTLC) and all metals were found to be either well below the regulatory levels or non detectable. The results indicate that the waste is non hazardous for metals. The total metal results were further compared with the Soluble Threshold Limit Concentration (STLC). Because the STI-Cs are based on the Waste Extraction Test (WET), which requires a 10:1 dilution of the sample, the results are not compared directly to the STLC levels. The maximum result that could be expected if the same sample were to undergo a WET is 10% of the total metal detected. Therefore, 10% of the total metal results were compared to the STLC levels. Based on this comparison, none of the metals are above the STLC levels and therefore are not potentially at hazardous waste levels. Therefore, a WET was not performed. Table III shows the results of the corrosivity screening; the pH is 5.57. Per 22 CCR §66261.22 if a solution has a pH less than or equal to 2 or greater than or equal to 12.5, it is hazardous. Central Spring's rinse water is not hazardous. Table IV summarizes the results of the acute 96-hour aquatic bioassay for hazardous waste determination per 22 CCR §66261.24(a)(6). The LC5o, is a numerical indicator of the toxicity of a waste to aquatic life. The regulations state a waste is hazardous if the LC50 is less than 500 mg/L. The rinse water solution of Central Spring has an LC50 greater than 750 mg/L. The sample is deemed to be not hazardous. CONCLUSION The analysis results showed that the rinsing solution that Central Spring, Inc. generates onsite is not hazardous waste according to the test methods for toxicity per 22 CCR §66261.24 and 22 CCR §66261.24(a)(6) or corrosivity per 22 CCR §66261.22. ATTACHMENTS Attached are copies of the laboratory test results and chain of custody forms. Central Spring, Inc. Waste Determination/Analysis Report 3/5/10 Page 4