attachment-5-rfp-des-2025-14.xlsx

This is an analytical laboratory results spreadsheet for the New Hampshire Department of Environmental Services' Winnipesaukee River Basin Program, documenting testing performed by Eastern Analytical, Inc. on biosolids samples from the Franklin Wastewater Treatment Facility. The samples (EAI Sample ID 279258.01), collected on May 28, 2024, from the Franklin WWTF Casella biosolids, underwent comprehensive hazardous waste characterization testing including Toxicity Characteristic Leaching Procedure (TCLP) analysis, total petroleum hydrocarbon (TPH) testing, polychlorinated biphenyl (PCB) screening, volatile organic compound (VOC) analysis, and semi-volatile organic compound (SVOC) testing. Analysis dates ranged from May 30 through June 12, 2024, with testing conducted according to EPA methods 8100mod, 6020A, 8082A, 8260C, 8270E, 8081B, and other standard analytical protocols. The samples contained 23.8% total solids with a pH of 7.73 and demonstrated an "Absent" result for free liquid content, indicating characteristics relevant to the Secondary Digester Number 1 cleaning project scheduled for April 1 through May 16, 2025.

The analytical results indicate that the biosolids samples met non-hazardous waste criteria, with all TCLP metals (arsenic, barium, cadmium, chromium, lead, mercury, selenium, and silver) testing below regulatory thresholds, all PCB congeners reported as less than 1 mg/kg, all volatile organic compounds below detection limits, and all semi-volatile organics (including chlorinated pesticides and herbicides) below quantifiable levels. Notable findings include TPH (C9-C40) at 22,000 mg/kg, sulfate less than 40 mg/kg, reactive cyanide less than 1 mg/kg, and reactive sulfide less than 10 mg/kg. Quality assurance surrogate recovery percentages ranged from 25% to 105%, with most analytical results carrying "U" (undetected) qualifiers at specified detection limits. These results provide the technical baseline for evaluating the dewatering and disposal requirements specified in the contract, particularly regarding the 24% minimum cake solids target and the 95% solids recovery requirement during the secondary digester cleaning operations.