Laserfiche WebLink
` PAGE 02 r <br />'M 06/07/2001 07:29 2099412574 <br /> _. HE EARNER <br /> OMPAN <br /> SCRAP <br /> METALS <br /> 2711 NAVY DRIVE STOCKTON, CA 95208 <br /> (209)948.3486 <br /> June 4, 2001 <br /> l <br /> Harlin Knoll, Senior REHS, <br /> LOP/Site Mitigation Unit IV <br /> Eavi rownenta3 Health Division ' <br /> San Joaquin County Public Health Services <br /> 304 East Weber,Avenue, Third Floor <br /> Stockton, California, 95202 <br /> Subject: 2711.Navy Drive, Local Oversight Program Site Code: 11204 <br /> i Limited Soil and Groundwater Sampling Report--Contaminant <br /> ( Calculations <br /> Dear Mr, Knoll: <br /> This transmittal is a follow-up to our recent telephone conference in which you requested <br /> that The Learner Company provide an estimate of the mass of all contaminants in the soil 3 <br /> and groundwater related to the subject project. The attached spreadsheet presents the <br /> requested information. ,Also,for ease of review, we have attached plot plans with <br /> contaminant concentrations and isopleths/areas used in the calculations. <br /> The soil volume calculations are conservatively assumed to represent a 5-foot depth <br /> } interval as are the groundwater volume calculations for all constituents. <br /> As discussed in the Limited Soil and Groundwater Sampling Report transmittal letter, <br /> ' approximately 93 cubic yards of impacted soil that was excavated during the tank 4 <br /> removal process was characterized on December 19, 1996 and, with approval from the <br /> EHD, was used to backfill the excavation, in general, based on the laboratory analytical <br /> data and the locations of the borings,the majority of the contamination remains within <br /> the limit of the former UST excavation (and within this backfiRed material), due to the <br /> E fine-grained nature, and related low permeability of the native soil. Therefore, the <br /> Jrrkattached calculations account for this area individually by impact and depth. As shown <br /> A;,�Lw„,.�F7tJP1;8 p501a1.dx <br /> I <br /> i <br /> f <br />