diff --git a/cs-config/cs_config/functions.py b/cs-config/cs_config/functions.py
index b396fe2c..cef61206 100644
--- a/cs-config/cs_config/functions.py
+++ b/cs-config/cs_config/functions.py
@@ -11,9 +11,11 @@
 from .helpers import retrieve_puf
 import cs2tc
 
-AWS_ACCESS_KEY_ID = os.environ.get("AWS_ACCESS_KEY_ID", "")
-AWS_SECRET_ACCESS_KEY = os.environ.get("AWS_SECRET_ACCESS_KEY", "")
-
+AWS_ACCESS_KEY_ID = os.environ.get("AWS_ACCESS_KEY_ID")
+AWS_SECRET_ACCESS_KEY = os.environ.get("AWS_SECRET_ACCESS_KEY")
+PUF_S3_FILE_LOCATION = os.environ.get(
+    "PUF_S3_LOCATION", "s3://ospc-data-files/puf.20210720.csv.gz"
+)
 
 class MetaParams(paramtools.Parameters):
     """
@@ -174,7 +176,9 @@ def run_model(meta_param_dict, adjustment):
     meta_params.adjust(meta_param_dict)
     # Get data chosen by user
     if meta_params.data_source == "PUF":
-        data = retrieve_puf(AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY)
+        data = retrieve_puf(
+            PUF_S3_FILE_LOCATION, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY
+        )
     else:
         data = "cps"
     # Get TC params adjustments
diff --git a/cs-config/cs_config/helpers.py b/cs-config/cs_config/helpers.py
index dac7d0cd..f411efd0 100644
--- a/cs-config/cs_config/helpers.py
+++ b/cs-config/cs_config/helpers.py
@@ -5,18 +5,21 @@
 import os
 from pathlib import Path
 import warnings
+import os
 
-try:
-    from s3fs import S3FileSystem
-except ImportError:
-    S3FileSystem = None
 import pandas as pd
 from ccc.utils import TC_LAST_YEAR
 
-AWS_ACCESS_KEY_ID = os.environ.get("AWS_ACCESS_KEY_ID")
-AWS_SECRET_ACCESS_KEY = os.environ.get("AWS_SECRET_ACCESS_KEY")
+try:
+    from s3fs import S3FileSystem
+except ImportError as ie:
+    S3FileSystem = None
 
-PUF_S3_FILE_NAME = "puf.20210720.csv.gz"
+AWS_ACCESS_KEY_ID = os.environ.get("AWS_ACCESS_KEY_ID", None)
+AWS_SECRET_ACCESS_KEY = os.environ.get("AWS_SECRET_ACCESS_KEY", None)
+PUF_S3_FILE_LOCATION = os.environ.get(
+    "PUF_S3_LOCATION", "s3://ospc-data-files/puf.20210720.csv.gz"
+)
 
 POLICY_SCHEMA = {
     "labels": {
@@ -79,8 +82,7 @@
 
 
 def retrieve_puf(
-    aws_access_key_id=AWS_ACCESS_KEY_ID,
-    aws_secret_access_key=AWS_SECRET_ACCESS_KEY,
+    puf_s3_file_location=PUF_S3_FILE_LOCATION, aws_access_key_id=AWS_ACCESS_KEY_ID, aws_secret_access_key=AWS_SECRET_ACCESS_KEY
 ):
     """
     Function for retrieving the PUF from the OSPC S3 bucket
@@ -89,15 +91,12 @@ def retrieve_puf(
     has_credentials = (
         aws_access_key_id is not None and aws_secret_access_key is not None
     )
-    if has_credentials and s3_reader_installed:
-        print("Reading puf from S3 bucket.")
-        fs = S3FileSystem(
-            key=AWS_ACCESS_KEY_ID,
-            secret=AWS_SECRET_ACCESS_KEY,
-        )
-        with fs.open(f"s3://ospc-data-files/{PUF_S3_FILE_NAME}") as f:
+    if puf_s3_file_location and has_credentials and s3_reader_installed:
+        print("Reading puf from S3 bucket.", puf_s3_file_location)
+        fs = S3FileSystem(key=AWS_ACCESS_KEY_ID, secret=AWS_SECRET_ACCESS_KEY,)
+        with fs.open(puf_s3_file_location) as f:
             # Skips over header from top of file.
-            puf_df = pd.read_csv(f, compression="gzip")
+            puf_df = pd.read_csv(f)
         return puf_df
     elif Path("puf.csv.gz").exists():
         print("Reading puf from puf.csv.gz.")
@@ -107,7 +106,8 @@ def retrieve_puf(
         return pd.read_csv("puf.csv")
     else:
         warnings.warn(
-            f"PUF file not available (has_credentials={has_credentials}, "
+            f"PUF file not available (puf_location={puf_s3_file_location}, "
+            f"has_credentials={has_credentials}, "
             f"s3_reader_installed={s3_reader_installed})"
         )
-        return None
+        return None
\ No newline at end of file
diff --git a/cs-config/install.sh b/cs-config/install.sh
index 5c74c541..f93f1afa 100644
--- a/cs-config/install.sh
+++ b/cs-config/install.sh
@@ -1 +1,2 @@
-conda install -c conda-forge ccc s3fs
+conda install -c conda-forge s3fs
+pip install -e .
\ No newline at end of file