What is the best estimate of the tph concentration

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Question 1: What is the best estimate of the TPH concentration after remediation? What is the range within which the inspector can be 95% con?dent that the true TPH concentration lies within the 1000 mgfkg soil TPH regulatory limit?

Question 2: De?ne what is the detection limit of an analytical method (in general, not for a speci?c method). What is the detection limit for MA EPH method? Here, provide a value.

Question 3: What is the recommended calibration range for MA EPH? Do the concentrations in the report lie within the calibration range? If no, what did the technician who analyzed these samples had to do?

Question 4: What are adequate blanks, ?eld blanks, and positive controls for this case?

Question 5: The soil samples from the table were received on August 1 in a cooler with ice and were analyzed on August 3, 2019. We do not have information on when they were sampled from the site and how they were handled. If the soil samples were collected and left in a warehouse for a few days (temperate of 30°C) before shipping, would that be an issue?

Question 6: If Euro?ns Lancaster Lab could not do the analysis for 38 days because of an employee strike, how should the samples be preserved until analysis?

Reference no: EM133223406

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