Laserfiche WebLink
Mr. Theodore I. Wittmayer, Attorney at Law January 27, 1993 <br /> Stone Brothers and Associates Page 2 <br /> phases. The work plan proposes installation of one soil boring to a total depth of 50 feet in the <br /> center of the former UST location through the concrete slab which is present at approximately <br /> 12 feet below the surface. This boring will be sampled at 5 foot intervals starting at 15 feet <br /> down to the total depth of 50 feet. The work plan indicates that the drilling subcontractor will <br /> be able to drill through the concrete slab with either standard hollow stem auger equipment or <br /> with a diamond core drilling bit. <br /> The work plan proposes soil sample analysis for TPH by EPA Method 8015 on all pies, <br /> Volatile Organic Compounds (VOCs) by EPA Method 8240 on the three samples ith the <br /> highest TPH and "fingerprint testing" on the sample with the highest TPH. <br /> EHD Response to the Phase V Work Plan <br /> The EHD responded to the Phase V work plan in a letter which stated that the scope of work <br /> proposed in the Phase V work plan was not adequate. The EHD letter, dated November 19, <br /> 1992, stated that the EHD does not agree with the EAI assertion that hydrocarbons fund in <br /> boring B-9 are not from gasoline and further stated that the soil sample analyses from B-9 <br /> indicate the presence of gasoline constituents in the soil within the depths of historical <br /> groundwater presence. Therefore a groundwater investigation is warranted on the site. <br /> The EHD also required that the product piping which was left in place when the tanks were <br /> removed be properly abandoned. With regard to sample analysis, the EHD letter stated hat the <br /> soil samples will be analyzed for TPH (total petroleum hydrocarbons) BTEX (benzene, t luene, <br /> ethylbenzene and xylene) and EDB (ethylene dibromide). Additionally, each sample ill be <br /> analyzed for total lead and samples which contain total lead concentrations exceeding 13 ppm <br /> must be subsequently analyzed for soluble lead. <br /> Summary of Phase V Work Plan Amendment <br /> In response to the EHD letter, EAI prepared an amendment to the Phase V work plan. The <br /> work plan amendment proposes removal of the product piping, a groundwater investigation and <br /> some revision to the originally proposed suite of analyses. As in the original work plan, a soil <br /> boring is proposed to be installed through the concrete slab and if the soil beneath the ncrete <br /> slab has not been impacted by hydrocarbons, Ward proposes to leave the slab in place. <br /> The groundwater investigation will consist of installation of two monitoring wells on tie site. <br /> Each well will be approximately 80 feet deep, constructed of 4-inch diameter PVC cas ng and <br /> screen and will be completed flush with the surface of the asphalt parking lot. Soil samples will <br /> be collected from the well borings at 5 foot intervals and analyzed for TPH, BTEX, ED 3, total <br /> lead and potentially for soluble lead. Groundwater samples will also be analyzed fo TPH, <br /> BTEX, EDB, total lead and potentially soluble lead. <br /> MX=MS\WITMYRI.WP <br />