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A total of 15 soil samples from the geoprobe survey (including one shallow and one deep sample <br /> from SB-5) will be submitted to the laboratory for analysis. The soil sample analytical program <br /> ' for each sample location is summarized in Table 5. To investigate potential sources of nitrate, all <br /> geoprobe soil samples will be analyzed for nitrate by EPA Method 300.0. To investigate <br /> ' potential sources of ammonia known to exist in the three northernmost wells at the site, soil <br /> samples from the geoprobe locations in the central and northern portion of the site will be <br /> ' analyzed for ammonia by EPA Method 350.2. To evaluate a possible source of triazine <br /> pesticides from the former storage trailers southwest of MW-2, one geoprobe soil sample from <br /> ' SB-7 will be analyzed by EPA 619. To better define the downgradient and vertical extent of <br /> petroleum hydrocarbons, one deep and one shallow soil sample from the deeper geoprobe boring <br /> ' (SB-5) will be analyzed for petroleum hydrocarbons. <br /> ' Fifteen groundwater grab samples (including one shallow and one deep sample from SB-5) will <br /> be collected and analyzed for pesticides and nitrate. The analytical program for each boring is <br /> summarized in Table 5. Eleven of the groundwater grab samples from locations in the vicinity of <br /> ' known herbicide concentrations in groundwater will be analyzed for herbicides. Six groundwater <br /> grab samples collected in the vicinity of known petroleum hydrocarbon concentrations in MW-1 <br /> ' will be analyzed for petroleum hydrocarbons. <br /> The analytical program will include the following methods and quantities: <br /> Methods Number of soil Number of water <br /> • EPA 602 M - expanded BTEX 6 6 <br /> ' EPA 8015 M - TPH-Gas 6 6 <br /> • EPA 8015 M - TPH-Diesel 6 6 <br /> i EPA 608 - organochlorine pesticides 0 15 <br /> • EPA 619 -triazine pesticides 1 15 <br /> • EPA 615 -herbicides 0 7 <br /> ' EPA 300.0 -nitrate as Nitrogen 15 15 <br /> • EPA 350.2 - ammonia as Nitrogen 11 1 I <br /> ' 6 <br />