1600 MADISON ST 2016-01-01 MF Import

C D. Rittenhouse-Zeman & �ssociates, Vapor Study To pro��ide a ouick in�•estigation to determine that th2 James �rcuerty caas not impacted on Jul:% '=1 a so±l �'apoc sur��=�• t:as oerfermed by the ebo�:= conir2cto= a 3/-4" solid pipe �+as to be d�iven intc =he glacial `ill to a maxim+im of lo feet, removed and replac�d with a 3/-1" pipe with a sma11 clear plastic hose inside. Then a pump was attached to vacuum out an air sample which �ras chec�ed for hydrocarbon type and concentration on the gas chromata�raph equipment. Because the ci:l was so dense the stainless steel rod could not be driven and samples could only be taken in the vadose zone (rooted or organic region of the soil) and to 6 ft. maximum depth. In addition to the vapor probe: the contractor performed four hand a�iger borings at the locations shown in Figure 1, the R-ZA Report in Appendix a. Two soil samples were taken from hand.auger boring B-1 and B-6 which were the closest 6orings to the tank spill area (See the R-ZA report for location and test results). Boring B-1 is about 7 ft. due south of the former tar.k site an3 B-6 is approximately 12 Peet to the southeast of the site. Neither soil sample on top of hardpan on the James prapert� showed Iaboratory detectable hydrocarbons. The vapor probes V-2 through 4 were performed south of t��.= tank site ne::t to and north of the James garage and also between the house and qarage. Shis latter probe V-3 showed minor amounts of ��apor while vapor probe V-4, about 12 ft. southeast of the tank site showed strong hydrocarbon vapors. Yrobe ti-4 shows that the soil on the James property at this point is infiltrated and affected. The source of the gasoline vapors is unknown but is most likelS coming from the contaminated soils under and west of the. southwest curner of the Fire Station. The contractor's L.E.L meter showed that at V-4 the hydrocarbon concentrations were up to 559G of L.E.L. while the V-3 probe which had almost undetectable hydrocarbon concentrations would probably not measure on an L.E.L. meter. Seacor Boring Study 1. On August 8, Seacor a boring contractor diameter borings at (See their report in Environmental Engineering directed to perform 5 Lruck-mounted 8 in. the locations shown on Figure 2 Appendis A). Due to the overhead electric service lines to the Pire Station and to the James residence the large 19 ft. boom could not be: maneuvered into position to do borings on the James property within the four fe�t north of the garage. Also, a 16 in. high concrete wali along the common property line interfered. �