IV. CHEMICAL TESTING 



4-01. LABORATORY SCREENING 



In the Haley & Aldrich, Inc. laboratory, fill and soil samples 

 were screened for the presence of detectable volatile organic 

 compounds. This screening consisted of using an HNU Systems, 

 Inc. PIlOl photoionization analyzer to determine the presence 

 of detectable volatile organic compounds in the headspace of 

 the sample jars. 



Using ultraviolet light, the instrument ionizes trace gases 

 such that the positive ions created are attracted to an 

 electrode having an applied negative potential. The current 

 measured at this electrode is proportional to the trace gas 

 concentration. The instrument readout provides a general 

 indication of the presence of detectable volatile organic and 

 inorganic compounds in parts per million (ppm) . The results of 

 these screening tests are provided in Table I of this report. 



The majority of the soil samples screened did not exhibit 

 elevated HNU readings. However, samples taken from the first 5 

 feet of fill from B102 (SI, S2, S3) exhibited elevated readings 

 of 8.2, 6.4 and 18.4 parts per million (ppm) above the 

 laboratory background level. One fill sample from B103(S5) 

 exhibited an elevated reading of 7.5 ppm above background. 



4-02. GROUNDWATER SAMPLING 



A groundwater sampling program was undertaken on-site to 

 evaluate the quality of the groundwater for environmental 

 purposes. Samples were obtained on 13 April 1988 from each of 

 the three monitoring wells shown on Figure 2 (B102-OW, B103-OW 

 and B104-OW) . 



Before obtaining the samples from the wells, approximately ten 

 well volumes of standing water were removed from B102-OW. Due 

 to poor recharge rates, B103-OW and B104-OW were bailed dry 

 five times before groundwater samples were obtained. After 

 removal of standing water with a stainless steel bailer, a 

 sample was obtained from the well with the bailer and 

 immediately poured into laboratory prepared containers. Prior 

 to bailing each well, the bailer was washed with mild 

 detergent, then rinsed successively with tap water, distilled 

 water, methanol and distilled water. The samples obtained were 



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