Laserfiche WebLink
Marci's Diesel Service . �"=� --3= November 28, 2011 <br /> Remediation Summary <br /> • Free Product: sheen in MW-4, MW-5, and MW-7, sheen last noted in June 2009. <br /> • Soil Excavation: excavation, unknown volume, was conducted to 29 feet below grade <br /> • In-Situ Soil/Groundwater Remediation:- Dual phase:extraction_pilot test_conducted in,___=._,_ <br /> ' August 2010,removed approximately 5 pounds of TPHg, <br /> • Groundwater Remediation: Air sparging, ,proposed <br /> General Site Conditions <br /> • Geology and Hydrogeology: The Site is underlain by interbedded and intermixed gravel, <br /> sand, silt and clay. The depth to groundwater at approximately 47 feet bgs and the <br /> groundwater gradient is north at approximately 0.001 feet per foot <br /> • Estimate of Hydrocarbon Mass in Soil: Prior to remediation, Geological Technics Inc. <br /> estimated that approximately 108,000 pounds of TPHd remained in soil and 1 to 8 <br /> pounds dissolved in groundwater. <br /> • Groundwater Trends: There are more than 11 years of groundwater monitoring data for <br /> this-Site. -TPHd-and,depth-to'grourndwater`trends°areshown below; s'ource`area (MW-.7{" <br /> and MW-4) and down gradient (MW-3) t <br /> DIESEL RANGE ORGANICS Results for MW77 <br /> 12000- _ I 43 <br /> 48 - <br /> I -1 1111 <br /> - 8000 -_.._ ....�... � _ ._-- 53 .� .. <br /> 6000 x :.... <br /> � 4000 63 G -, + .• '' i <br /> 68 <br /> 04 73 <br /> Ile 'Ile .0e <br /> ... ._:_._ _ .... ,.... <br /> DIESEL RANGE ORGANICS Depth.to Water Trend <br /> DIESEL RANGE ORGANICS Results for MW-4 <br /> 5000{ 42 <br /> 4500-j ..I .._..- i -.. J �. ._.._ ' <br /> _1. vv ._ .. .. . �4 <br /> 4000-^ <br /> 3500 7 522 <br /> . <br /> c <br /> U. 3000 <br /> ._-.�_....��._Y--_-,..`- - ._,.._ x_2500 ,.... _! - - '-f•.��. r ��,3:r - - ' <br /> 2000 62 <br /> F <br /> 1$00 <br /> 1000 67 <br /> 500.x..,,,.. _�_ i-__ -`.�_ .�-1.=x- .._ _ ___ 72 <br /> 'r" ._ Ste~ <br /> vx:+--+ DIESEL RANGE ORGANICS Depth to Water w r Trend •• ' - <br /> r .j - <br />