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~1 <br />1 <br />Ltr/Revw Bsln Env Data - 8 - July 2, 1986 <br />i. The "Recommended Depth of Maximum Salvage" for Bankard LS is 24 <br />inches ("). However, the information presented in Table 2.04.9-7 <br />"Evaluation of Soil Stability for Reclamation by Typical Soil <br />Pedon" would lend support to a greater soil depth to salvage. <br />Table 2.04.9-7 depicts a salvageable depth for Bankard Pedon 15 of <br />60"; whereas, the salvageable depth for Youngston Pedon 19 is <br />listed at 24". The limiting factor for not going deeper than 24" <br />in the Youngston soils is due to an "unsuitable" electrical <br />conductivity (EC ). A review of the data presented in the appendix <br />specifies an EC of 14.2 mnhos/cm for 24"-41" depth of Youngston, <br />which is within the "Poor" category of Table 2.04.9-6 "Criteria for <br />Topsoil Suitability". Due to the extremely limited amount of <br />topsoil medium at this site, the applicant should consider <br />increasing the salvageable depth to 41" for the following reasons. <br />1. The EC measurements for Bankard soils are from "Good" to "Fair" <br />(for depths of 0-9", 9"-41" and 41"-60" the respective EC <br />readings are 4.2 mmhos/cm, 3.0 and 2.7). <br />2. The EC measurements for Youngston soil above 24" are "Good" <br />(for depths 0-5" and 5"-24" the EC measurements are 1.8 <br />mnhos/cm and 2.0, respectively). <br />3. The Bankard LS soils consist of 90% Bankard soils versus only <br />10% for the Youngston soils. <br />4. The dilution effect created by the minimal Youngston soil and <br />even more minimal high Youngston EC soil should allow for <br />greater salvaging depth. <br />ii. The "Recommended Depth of Maximum Salvage" for Persayo SiL is 7". <br />However, the specified "Restrictive Feature(s)" is siltstone below <br />16". Therefore, the salvage depth should be increased to 16" <br />rather than the listed 7". <br />iii. The "Recommended Depth of Maximum Salvage" for Torriorthents, Very <br />shallow and Torriorthents, moderately deep is 10". However, a <br />review of Table 2.04.9-7 indicates a salvage depth of 29" for <br />Torriorthents, moderately deep. The applicant should split this <br />latter soil into a separate category to reflect correct salvage <br />depth. <br />(D). The Division's 1984 PAR requested verification of the depth of <br />"A" and "B" horizon material by sampling a minimum four sites for each <br />soil type for every 25 acres or portion of 25 acres to be disturbed at <br />each facility area. In response, the applicant submitted the <br />Walsh 8 Associates' field notes for the soil samples taken when <br />preparing the November 15, 1983 soil report. The submittal of these <br />field notes does not satisfy the Division's concern about the limited <br />amount of available salvageable soil medium. The applicant must <br />provide the information requested in the original PAR. <br />